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SP 8RG: The Autonomic Nervous System
SP 8RG: The Autonomic Nervous System Notecards
173
Physiology
Undergraduate 3
11/16/2012

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Term
The __________ __________ __________ controls the body's internal environment in a coordinated manner.
Definition
1) Autonomic Nervous System
Term
What are five bodily functions the ANS helps to control?
Definition
1) Heart rate
2) Blood pressure
3) Digestion
4) Respiration
5) Blood pH
Term
__________ is a dynamic balance between the autonomic branches.
Definition
1) Homeostasis
Term
The __________ actively dominates rest-and-digest while the __________ actively dominates fight-or-flight.
Definition
1) Parasympathetic
2) Sympathetic
Term
Which division of the ANS is responsible rest-and-digest behaviors? For fight-or-flight?
Definition
1) Parasympathetic
2) Sympathetic
Term
Which division of the ANS is also known as the vegetative system?
Definition
1) Parasympathetic
Term
What are nine common fight-or-flight responses?
Definition
1) Increased heart rate and contractility
2) Dilation of bronchioles for easier breathing
3) Constriction of arterioles in the skin, digestive system, and non-exercising muscles
4) Inhibition of digestive functions
5) Widening of pupils
6) Increased glucose in blood due to glycogenolysis in the liver
7) Increased fatty acid in the blood from adipose tissue
8) Piloerection
9) Cold sweat (stimulated sweating with constricted skin arterioles)
Term
__________ nerves come from the thoracic and lumbar regions of the spinal cord.
Definition
1) Sympathetic
Term
Where do sympathetic nerves come from?
Definition
1) Thoracic and lumbar regions of the spinal cord
Term
The __________ nerves are short and synapse in paired ganglia adjacent to the spinal cord.
Definition
1) Preganglionic
Term
Where do preganglionic nerves synapse?
Definition
1) In paired ganglia adjacent to the spinal cord
Term
True or False: The adrenal medulla is technically an exocrine gland.
Definition
1) False: The adrenal medulla is technically an ENDOCRINE gland
Term
The __________ __________ is like a modified autonomic ganglion and postsynaptic nerve.
Definition
1) Adrenal medulla
Term
The adrenal medulla, technically an __________ __________, is functionally a part of the __________ nervous system.
Definition
1) Endocrine gland
2) Sympathetic
Term
The __________ nerves come from the cranial and sacral regions of the CNS; they have long preganglionic nerves which synapse at ganglia near or on the organ innervated.
Definition
1) Parasympathetic
Term
Where do the parasympathetic nerves come from?
Definition
1) The cranial and sacral regions of the CNS
Term
__________ fibers of the SNS emerge from the spinal cord at levels __________-__________.
Definition
1) Preganglopnic
2) T1 - L2
Term
The __________ and __________ work together in reciprocal fashion to regulate body function.
Definition
1) SNS
2) PNS
Term
Preganglionic fibers of the PNS are associated with what cranial nerves? Where do they emerge from?
Definition
1) Nerves III, VII, IX, and X
2) The sacral spinal cord at S2-S4
Term
The parasympathetic system is involved in __________ processes such as digestion and homeostasis.
Definition
1) Vegetative
Term
True or False: The adrenal medulla is a modified part of the SNS.
Definition
1) True
Term
In the adrenal medulla, there are modified sympathetic ganglion which do not give rise to __________ fibers.
Definition
1) Postganglionic
Term
The stimulation of what prompts the secretion of hormones into the blood?
Definition
1) Preganglionic fibers
Term
About 20% of the hormone released into the blood is __________ and about 80% is __________.
Definition
1) Norepinephrine
2) Epinephrine (adrenaline)
Term
What is the percentage of norepinephrine is released into the blood? Epinephrine?
Definition
1) 20%
2) 80%
Term
What are the nine targets of the ANS?
Definition
1) The heart (cardiac muscle)
2) Nearly all blood vessels (smooth muscle)
3) Nearly all organs (smooth muscle)
4) The lungs
5) Exocrine glands (sweat, salivary, digestive)
6) Some endocrine glands
7) Metabolic tissue (adipose tissue, liver)
8) Kidneys
9) Lymphoid tissue
Term
What type of muscle is the heart composed of? The blood vessels? Nearly all organs?
Definition
1) Cardiac
2) Smooth
3) Smooth
Term
The two branches of the ANS use the same neurotransmitter, __________ in the ganglia.
Definition
1) Acetylcholine
Term
What neurotransmitter does the PNS primarily use? The SNS?
Definition
1) Acetylcholine
2) Norepinephrine
Term
True or False: Norepinephrine is not the same thing as noradrenaline.
Definition
1) False: Norepinephrine IS the same thing as noradrenaline
Term
There are a few __________ nerves where the transmitter at the organ is for accetylcholine
Definition
1) Sympatetic
Term
What sympathetic fibers release acetylcholine?
Definition
1) Sweat glands
2) Piloerector muscles
3) Some blood vessels
Term
What are ten functions of sympathetic stimulation?
Definition
1) Pupil dilation
2) Stimulate sweat glands
3) Constrict peripheral vessels
4) Increase blood to skeletal muscles
5) Increase chronotropic and inotropic effects
6) Bronchodilation
7) Reduce blood flow to abdomen
8) Decrease digestive activity
9) Relax smooth muscle in wall of bladder
10) Release glucose stores from the liver
Term
What are five functions of the PNS?
Definition
1) Pupillary constriction
2) Secretion by digestive glands
3) Increased smooth muscle activity along the GI tract
4) Bronchoconstriction
5) Reduced heart rate
Term
Most __________ and __________ receive only sympathetic nerve fibers (arteries and capillaries are not innervated)
Definition
1) Arterioles
2) Veins
Term
Most __________ __________ are innervated only by sympathetic nerves.
Definition
1) Sweat glands
Term
Sweat glands are innervated by only what type of nerves?
Definition
1) Sympathetic
Term
__________ __________ are innervated by both ANS divisions but activity is not antagonistic - both stimulate salivary secretion.
Definition
1) Salivary glands
Term
Salivary glands are innervated by what divisions of the ANS?
Definition
1) Both
Term
The __________ __________ __________ extends from the CNS to an innervated organ.
Definition
1) Autonomic nerve pathway
Term
A __________ __________ __________ is a cell body in the CNS that synapses with the cell body of a second neuron.
Definition
1) Preganglionic fiber neuron
Term
What is a preganglionic fiber neuron?
Definition
1) A cell body in the CNS that synapses with a cell body of a second neuron
Term
A __________ __________ innervates an effector organ.
Definition
1) Postganglionic fiber
Term
Preganglionic neurons (N1) from __________ region of the spinal cord.
Definition
1) Thoracolumbar
Term
What region of the spinal cord can preganglionic neurons be found in?
Definition
1) Thoracolumbar
Term
Long postganlionic neurons (N2) secrete nonepinephrine onto __________ __________.
Definition
1) Adrenergic receptors
Term
What type of neurons secrete NE onto adrenergic receptors?
Definition
1) Long postganglionic neurons
Term
Where do fibers originate in the SNS?
Definition
1) In the thoracic and lumbar regions of the spinal cord
Term
Where do fibers originate in the PNS?
Definition
1) In cranial and sacral areas of the CNS
Term
Most preganglionic fibers of the SNS are __________.
Definition
1) Short
Term
Preganglionic fibers of the PNS are __________.
Definition
1) Long
Term
Preganlionic fibers of the SNS release what neurotransmitter?
Definition
1) Acetylcholine
Term
Preganglionic fibers of the PNS release whay neurotransmitter?
Definition
1) Acetylcholine
Term
Most postganglionic fibers in the SNS release what neurotransmitter?
Definition
1) Norepinephrine (noradrenaline)
Term
Postganglionic fibers in the PNS release what neurotransmitter?
Definition
1) Acetylcholine
Term
Where is the origin of postaganglionic fibers in the SNS?
Definition
1) The sympathetic ganglion chain or collateral ganglia
Term
Where is the origin of postganglionic fibers in the PNS?
Definition
1) The terminal ganglia (in or near effector organs)
Term
What effector organs are innervated by the SNS?
Definition
1) Cardiac muscle
2) Almost all smooth muscle
3) Most exocrine glands
4) Some endocrine glands
Term
What effector organs are innervated by the PNS?
Definition
1) Cardiac muscle
2) Most smooth muscle
3) Most exocrine glands
4) Some endocrine glands
Term
What type of receptors are used for neurotransmitters in the SNS for preganglionic neurons? For postganglionic neurons?
Definition
1) Nicotinic
2) a1, a2, B1, B2
Term
What type of receptors are used for neurotransmitters in the PNS for preganglionic neurons? For postganglionic neurons?
Definition
1) Nicotinic
2) Muscarinic
Term
What the four neurotransmitters of the ANS?
Definition
1) Acetylcholine
2) Norepinephrine
3) Epinephrine
4) Dopamine
Term
__________ is a simple molecule synthesized from choline and acetyl-CoA through the action of choline acetyltransferase.
Definition
1) Acetylcholine
Term
What enzyme greatly assists in the creation of acetylcholine?
Definition
1) Choline acetyltransferase
Term
What are the three catecholamines? What are they formed from?
Definition
1) Norepinephrine
2) Epinephrine
3) Dopamine
4) Pheylalanine and tryosine
Term
Tryosine is produced in the __________ from phenylalanine through the action of __________ __________.
Definition
1) Liver
2) Phenylalanine hydroxylase
Term
What enzyme is vital in the creation of tryosine?
Definition
1) Phenylalanine hydroxylase
Term
In latin, __________ means above and __________ means kidney.
Definition
1) Ad
2) Renal
Term
What are the two most common autonomic neurotransmitters?
Definition
1) Acetylcholine
2) Norepinephrine
Term
Acetylcholine neurons and receptors are called __________ (__________ or __________).
Definition
1) Cholinergic
2) Nicotinic
3) Muscarinic
Term
What are the neurons and receptors called for acetylcholine?
Definition
1) Cholinergic
2) Nicotinic
3) Muscarinic
Term
Where are acetylcholine receptors located?
Definition
1) Autonomic preganglionic and parasympathetic postganglionic synapses
Term
What are the NE neurons and receptors called?
Definition
1) Adrenergic (alpha and beta)
Term
Where are the NE neurons and receptors located?
Definition
1) At the sympathetic postganglionic synapses
Term
Acetyl-coenzyme A is synthesized from __________ by mitochondria within __________ nerves.
This acetyl-CoA combines with choline that is transported into the nerve axon to form __________.
The enzyme responsible for this is __________ __________.
The newly formed acetylcholine is then transported into __________ for storage and subsequent release
After acetylcholine is released, it is rapidly degraded with __________ to form acetate and choline.
Definition
1) Pyruvate
2) Cholinergic
3) Acetylcholine
4) Choline acetyltransferae
5) Vesicles
6) Acetylcholineesterase
Term
The amino acid __________ is transported into the sympathetic nerve axon.
Tryosine is converted to __________ by tryosine hydroxylase (__________-__________ step for NE synthesis).
DOPA is converted to dopamine by __________ __________.
Definition
1) Tryosine
2) DOPA
3) Rate-limiting
4) DOPA decarboxylase
Term
What enzyme is responsible for combining acetyl-CoA with choline?
Definition
1) Choline acetyltransferase
Term
What enzyme is responsible for the degradation of acetylcholine?
Definition
1) Acetylcholineesterase
Term
What enzyme is responsible for converting tryosine into DOPA?
Definition
1) Tryosine hydroxylase
Term
What enzyme is responsible for converting DOPA to dopamine?
Definition
1) DOPA decarboxylase
Term
Dopamine is transported into vesicles then converted to NE by __________ __________-__________ ; transport vesicles can be blocked by the drug __________.
Definition
1) Dopamine beta-hydroxylase
2) Reserpine
Term
What enzyme is responsible for converting norepinephrine to NE? What may block transport into the vesicle?
Definition
1) Dopamine beta-hydroxylase
2) The drug reserpine
Term
What are the steps for the release of a neurotransmitter?
Definition
1) An action potential traveling down the axon depolarized the membrane and causes Ca2+ to enter the axon
2) Ca2+ causes the vesicle to migrate to the axonal membrane and fuse with the membrane, permitting the NE to diffuse out of the vesicle into the extracellular space
3) DBH, and depending on the nerve other secondary neurotransmitters is released along with the NE; NE then binds to the postjunctional receptor and stimulates the effector organ response
Term
__________ receptors bind to acetylcholine.
Definition
1) Cholinergic
Term
What type of receptors bind to acetylcholine?
Definition
1) Cholinergic
Term
__________ receptors can be found on a postaganglionic cell bodies of all autonomic ganglia.
Definition
1) Nicotinic
Term
Where can nicotinic receptors be found?
Definition
1) On postganglionic cell bodies of all autonomic ganglia
Term
__________ receptors can be found on effector cell membranes.
Definition
1) Muscarinic
Term
Where can muscarinic receptors be found?
Definition
1) On effector cell membranes
Term
__________ receptors bind to NE and epinephrine.
Definition
1) Adrenergic
Term
Where do adrenergic receptors bind?
Definition
1) To norepinephrine and epinephrine
Term
The binding of the NE to its receptor depends on the __________ of NE in the vicinity of the receptor.
If the nerve stops releasing NE, then the NE concentration in the junctional cleft will decrease and NE will leave the receptor.
Definition
1) Concentration
Term
Most (__________) of the NE is transported back into the nerve terminal by a neuronal __________ __________ __________. This transporter can be blocked by __________; therefore, __________ increases junctional NE concentrations by blocking its reuptake and subsequent metabolism
Definition
1) 90%
2) Reputake transport system
3) Cocaine
4) Cocaine
Term
Some of the junctional NE diffuses into capillaries and is carried out of the tissue by the circulation. Therefore, the high levels of __________ activation in the body increase the __________ concentration of NE and its metabolites.
Definition
1) Sympathetic
2) Plasma
Term
Some of the junctional NE is metabolized within the __________ __________ before reaching the capillaries.
Definition
1) Extracellular space
Term
A small amount of NE (__________) is taken up by the __________ __________ and metabolized.
Definition
1) 5%
2) Postjunctional tissue
Term
What occurs with high levels of sympathetic activation?
Definition
1) The increase of plasma concentration of NE and its metabolites
Term
Where is some of the junctional NE metabolized before reaching the capillaries?
Definition
1 Extracellular space
Term
What is the process of extraneuronal uptake?
Definition
1) When a small amount of NE (5%) is taken up by the postjunctional tissue and metabolized
Term
From the medulla, the __________ (Vagus) ganglia releases __________ to the heart and vessels.
Definition
1) Parasympathetic
2) Acetylcholine
Term
All __________ __________ release acetylcholine.
Definition
1) Presympathetic ganglia
Term
From the spinal cord, the post sympathetic adrenergic releases __________ to the heart and vessels.
Definition
1) Norepinephrine
Term
From the spinal cord, the post sympathetic cholinergic releases __________ to the sweat glands and vessels
Definition
1) Acetylcholine
Term
From the spinal cord the post sympathetic dopaminergic releases __________ to the renal vessels.
Definition
1) Dopamine
Term
From the spinal cord the adrenals release __________ and __________ into the blood; this goes to the heart and blood vessels.
Definition
1) Epinephrine
2) Norepinephrine
Term
Axons of __________ fibers branch extensively to innervate many cells.
Definition
1) Postganglionic
Term
Neurotransmitters are released from multiple __________ with each action potential; synthesis of a __________ is in the varicosity.
Definition
1) Varicosities
2) Neurotransmitter
Term
__________ __________ __________ is when synapses occur where varicosities pass closely over the surface of the muscle cells.
Definition
1) Synapse en passant
Term
What is synapse en passant?
Definition
1) When synapses occur where varicosities pass closely over the surface of muscle cells
Term
What are the steps for norepinephrine release at a varicosity of a sympathetic neuron?
Definition
1) Action potential arrives at the varicosity
2) Depolarization opens voltage-gated Ca2+ channels
3) Ca2+ entry triggers exocytosis of synaptic vesicles
4) NE binds to adreneric receptor on target
5) Receptor activation ceases when NE diffuses away from the synapse
6) NE is removed from the synapse
7) NE can be taken back into synaptic vesicles for re-release
8) NE is metabolized by monoamine oxidase (MAO)
Term
The heart is regulated by the __________ adrenergic receptor.
Definition
1) Beta 1
Term
Adipose tissue is regulated by the __________ adrenergic receptor.
Definition
1) Beta 1
Term
Vascular smooth muscle is regulated by the __________ adrenergic receptor.
Definition
1) Beta 2
Term
Airway smooth muscle is regulated by the __________ adrenergic receptor.
Definition
1) Beta 2
Term
Kidney-renin release from JG cells is regulated by the __________ adrenergic receptor.
Definition
1) Beta 1
Term
What are the two types of cholinergic receptors?
Definition
1) Nicotinic
2) Muscarinic
Term
Nicotine is an __________ in the autonomic ganglia and SNS. It directly opens __________ and __________ channels. The antagonist for nicotine is __________.
Definition
1) Agonist
2) Na+
3) K+
4) Curare
Term
What does nicotine do in the autonomic ganglia of the SNS? What is it's antagonist?
Definition
1) Opens Na+ and K+ channels
2) Curare
Term
Muscarine is an __________ found in the neuro-effector junctions of the PNS. It utilizes __________-__________ __________ mechanisms and it's antagonist is __________.
Definition
1) Agonist
2) G-protein coupled mechanisms
3) Atropine
Term
Where can muscarine be found? What is it's antagonist?
Definition
1) Neuro-effecor junctions of the parasympathetic branch
2) Atropine
Term
What are the muscarinic receptors in the PNS? In the SNS?
Definition
PNS:
1) Cardiac conduction system
2) Exocrine glands
3) Smooth muscles
SNS:
1) Sweat glands
Term
Muscarinic acetylcholine are __________-__________ mediated.
Definition
1) G-protein
Term
Adrenergic receptors are found in the neuroeffector junctions of the sympathetic branch and are __________-__________ linked with various __________ __________.
The neurotransmitter here is __________ and the receptors can be subdivided into __________ and __________.
Definition
1) G-protein
2) 2nd messengers
3) Norepinephrine
4) Alpha and beta
Term
What is the neurotransmitter for alpha sympathetic receptors? What occurs when Ca2+ is increased?
Definition
1) Nonepinephrine
2) Muscle contraction or secretion by exocytosis followed by inhibition of the GI tract and pancreas
Term
Which neurotransmitter is more important in beta 1 receptors?
Definition
1) Norepinephrine = Epinephrine
Term
The beta 2 sympathetic receptor is usually __________ causing smooth muscle relaxation of some blood vessels and the bronchioles.
What neurotransmitter is more important in the beta 2 receptors?
Definition
1) Inhibitory
2) Epinephrine > Norepinephrine
Term
The beta 2 sympathetic receptors target __________ tissue and the neurotransmitter __________ is preferred over __________.
Definition
1) Adipose
2) Norepinephrine
3) Epinephrine
Term
What is the function of beta 2 receptors?
Definition
1) Are inhibitory and cause the smooth muscle relaxation of blood vessels and the bronchioles.
Term
The binding of norepinephrine to it's receptor causes the dissociation of __________-__________.
Binding of the alpha G-protein to the enzyme __________ __________ activates this enzyme, leading to the production of __________ __________.
In turn, cyclic AMP activates __________ __________ which can open ion channels and produce other effects.
Definition
1) G-protein
2) Adenylate cyclase
3) Cyclic AMP
4) Ion channels
Term
Norepinephrine and epinephrine are metabolized by __________-__________-__________ and monoamine oxidase (MAO).
The final product of these pathways is __________ __________; this final product with its precursors __________ and __________ is measured in urine and plasma in the diagnosis of __________ which can cause severe hypertension and cardiac arrhythmias.
Definition
1) Catechol-O-methytransferase (COMT)
2) Vanillylmandelic acid (VMA)
3) Normetanephrine
4) Metanephrine
5) Pheochromocytoma
Term
What is pheochromocytoma? What are the methods for detecting this disorder?
Definition
1) A disorder that can causes severe hypertension and cardiac arrhthmias
2) It can be detected through the combined measurements of vanillylmandelic acid (VMA), normetanephrine, and metanephrine
Term
__________ of the ANS are those that bind to the same receptor as the neurotransmitter and elicit an effect that mimics that of the neurotransmitter.
Definition
1) Agonists
Term
__________ of the ANS are those that bind with the receptor and block the neurotransmitter's response.
Definition
1) Antagonists
Term
__________ bind to receptors and simulate or enhance a neurotransmitter's actions
Definition
1) Agonists
Term
What are agonists?
Definition
1) Agents of the ANS that bind to receptors and stimulate or enhance a neurotransmitter's actions
Term
__________ have the opposite effect of agonists by blocking the receptor and inactivating it; this nullifies or diminishes the effect of the neurotransmitter.
Definition
1) Antagonists
Term
What are antagonists?
Definition
1) Agents of the ANS that have the opposite effects of agonists by blocking the receptors and inactivating them; this will nullify or diminish a neurotransmitter's effects
Term
__________ drugs mimic the effects of neurotransmitter substances of the sympathetic nervous system such as catecholamines
Definition
1) Sympathomimetic
Term
What are sympathomimetic drugs?
Definition
1) Drugs which mimic the effects of neurotransmitter substances of the SNS such as catecholamines
Term
__________ drugs act by stimulating or mimicking the PNS.
Definition
1) Parasympathomimetic
Term
What are parasympathomimetic drugs?
Definition
1) Drugs which act by stimulating or mimicking the PNS.
Term
__________ drugs are medications which inhibit the postganglionic functioning of the SNS.
Definition
1) Sympathiocolytic
Term
What are sympathicolytic drugs and what are their uses?
Definition
1) Sympathicolytic drugs are medications which inhibit the postganglionic functioning of the SNS.
2) They have been used as antihypertensives and to treat anxiety.
Term
__________ drugs are substances that reduce the activity of the PNS.
Definition
1) Parasympathicolytic
Term
What are parasympathicolytic drugs?
Definition
1) Substances which reduce the activity of the PNS.
Term
The CNS and control of the ANS can be influenced by __________ __________ __________ through its involvement with emotional expression which is characteristic of an individual's personality.
Definition
1) Prefrontal association complex
Term
The __________ plays an important role in integrating autonomic, somatic, and endocrine responses that automatically accompany various emotional and behavioral states.
Definition
1) Hypothalamus
Term
What plays an important role in integrating autonomic, somatic, and endocrine responses that automatically accompany various emotional and behavioral states?
Definition
1) The hypothalamus
Term
The __________ within the brain stem is a region directly responsible for autonomic output.
Definition
1) Medulla
Term
What region of the brain stem is directly responsible for autonomic output?
Definition
1) The medulla
Term
What are a few examples of autonomic reflexes that are integrated at the spinal cord level?
Definition
1) Urination
2) Defecation
3) Erection
Term
The __________ is responsible for controlling water balance, temperature, and hunger.
Definition
1) Hypothalamus
Term
Name three autonomic bodily functions of the hypothalamus?
Definition
1) Control of water balance
2) Temperature
3) Hunger
Term
The __________ is responsible for respiration.
Definition
1) Pons
Term
What autonomic bodily function is the pons responsible for?
Definition
1) Respiration
Term
The __________ is responsible for respiration, cardiac, vomiting, and swallowing.
Definition
1) Medulla
Term
What four autonomic bodily functions is the medulla responsible for?
Definition
1) Respiration
2) Cardiac contractions
3) Vomiting
4) Swallowing
Term
The __________ is involved in the coordination of ANS responses.
Definition
1) Hypothalamus
Term
Electrical stimulation of the anterior hypothalamus, particularly the suproptic area, triggers a __________ response.
Conversely, activation of the posterior hypothalamus, particularly the tuberal area, triggers a __________ response.
Definition
1) Thermolytic
2) Thermogenic
Term
How can a thermolytic response be generated? A thermogenic?
Definition
1) By stimulating the supraoptic area
2) By stimulating the tuberal area
Term
The extreme lateral part of the __________ __________ regulates food intake.
Definition
1) Ventromedial nucleus
Term
What is the purpose of the ventromedial nucleus?
Definition
1) Regulates food intake
Term
What are the three areas that have been proposed as vital in the participation of thirst?
Definition
1) The lateral hypothalamic area
2) The hypothalamic paraventricular nucleus
3) The periaqueductal gray
Term
__________ proposed that a circulatory consortium of neural components and their connections participate in concert harmoniously to elaborate emotional awareness.
Definition
1) Papez
Term
The __________ __________ helps control emotional behavior, in part by influence of the hypothalamus.
Definition
1) Limbic system
Term
What is the role of the limbic system?
Definition
Processes emotions, including:
1) Anger
2) Fear
3) Sexual arousal
4) Pleasure
5) Sadness
Term
What are Cannon's properties of homeostasis?
Definition
1) Maintenance of the internal environment
2) Tonic control
3) Antagonistic control
4) Variable tissue responses
Term
Most sympathetic pathways originate in the __________ and __________ regions of the spinal cord.
Most sympathetic ganglia lie either close to the __________ __________ or along the __________ __________.
Definition
1) Thoracic
2) Lumbar
3) Sympathetic ganglia
4) Descending aorta
Term
Parasympathetic pathways originate in the __________ __________ or the __________ __________ of the spinal cord.
Parasympathetic ganglia are located on or near their __________ __________.
Definition
1) Brain stem
2) Sacral region
3) Target organs
Term
The synapse between an autonomic neuron and its target cells is called the __________ __________.
Definition
1) Neuroeffector junction
Term
Postganglionic autonomic axons end with __________ from which neurotransmitter is released.
Definition
1) Varicosities
Term
The __________ __________ secretes epinephrine and is controlled by sympathetic preganglionic neurons.
Definition
1) Adrenal medulla
Term
__________ __________ receptors are also G protein-coupled receptors.
Definition
1) Cholinergic muscarinic
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