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Biology
Professional
01/25/2009

Additional Biology Flashcards

 


 

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Term
Cholinergic receptor
Definition
Binds Ach
Term
Cholinergic Nn receptor
Definition
Receptors found on sympathetic and parasympathetic post-ganglionic neurons and on chromaffin cells of the adrenal medulla.
Term

1. Post-ganglionic sympathetic neurons

2. Post-ganglionic parasympathetic neurons

3. Chromaffin cells of the adrenal medulla

Definition
Where are Nn cholinergic receptors found?
Term
Cholinergic Nm receptor
Definition
Receptor found at the motor endplate of skeletal muscles
Term
Cholinergic M receptor
Definition
Receptor found at the parasympathetic target organs, also found in the sweat glands.
Term
Adrenal medulla
Definition
This structre secretes epinephrine
Term
The sweat gland is the only receptor that binds Ach to elicit a sympathetic response.
Definition
Why is the sweat gland unique?
Term

1. blood vessels

2. sweat glands

3. kidney

4. adrenal medulla

 

Definition
Organs or areas that are innervated by sympathetic only (4).
Term
CN 3, 7, 9, 10 of the parasympathetic
Definition
Cranio out flow is what nerves? of what system?
Term

1. bladder

2. genitalia

3.  lower bowels

 

S2, S3, S4

Definition
Sacral outflow innervates what 3 things? What levels do they originate from?
Term
T1-L2
Definition
Levels of outflow of the sympathetic nervous system
Term
Intermediolateral horn of the spinal cord. They exit the cord via the ventral roots.
Definition
Where, in the spinal cord, do the cell bodies of the sympathetic neurons originate? Which side do they exit?
Term

1. synapse on the sympatheic chain gain.

2. go up or down the chain to synapse.

3. pass thru the ganglia (unsynapsed) and synapse on a visceral ganglia

Definition
The 3 options that a sympathetic nerve can do about synapsing.
Term
Sympathetic chain gang
Definition
Paravertebral
Term
Sympathetic nervous system
Definition
Noxious stimuli, such as excessive stretch, is communicated to CNS via _______.
Term
Parasympathetic nervous system
Definition
Physiologic conditions such as stretch, temp, pH, hypoxia are communicated to the CNS via ______.
Term
blood vessels
Definition
Sympathetic activity is always on in ____ ____. It can be increased or decreased.
Term
Vagal
Definition
____ activity is always on to the heart.
Term
Miosis
Definition
Pupil constriction mediated by the parasympathetic response circular sphincter muscle.
Term
Mydriasis
Definition
Pupil dialation mediated by the sympathetic response of the radial muscle.
Term
Salivary gland
Definition
Gland that is atypical in that it is innervated by both the sympathetic and parasympathetic.
Term
Ach
Definition
Binds to ALL pre-ganglionic receptors and post-ganglionic parasympathetic receptors.
Term
Norepinephrine
Definition
Released from sympathetic post-ganglionic neurons
Term

1. Sympathetic cholinergic innervations of sweat glands

2. Dopaminergic innervations of renal blood vessels causing renal dilation.

Definition
2 exceptions in the ANS neurotransmission
Term
NEpi  Alpha 1
Definition
Binding of ____ to this receptor___ causes contraction of smooth muscle found in blood vessels, GI and bladder sphincters, and radial muscle of iris.
Term

Gq mediated activation of phospholipase C -->increased production of IP3 --> increased levels of intracellular Ca++

 

Gq--> activated phospholipase C--> higer IP3--> higher Ca++ in cell

Definition
Mechanism of action of Alpha 1 receptor
Term
Gi protein mediated inhibition of adenyl cyclase--> this leads to decreased levels of cAMP
Definition
Mechanism of action of Alpha 2
Term
Gs stimulates adenyl cyclase--> increased cAMP
Definition
Mechanism of action of Beta 1 receptors
Term
Beta 1 receptors
Definition
Stimulates the heart and juxtaglomerular cells of the kidney that produce renin.
Term
Beta 2 receptors
Definition
Stimulates relaxation of the bronchioles and skeletal muscle blood vessels
Term
Gs protein stimulation of adenlyl cyclase --> converts ATP to increase cAMP
Definition
Mechanism of action of Beta 2 receptors
Term

Beta 1, than Alpha 1

Stimulates the heart and the kidney

Definition
Catechcolamines are more potent at _____ receptors than at ____ receptors. Thus, the epinephrine release produces more of a ____ response.
Term
Beta 1
Definition
Norepi and epi have equal potencies at _____ receptors
Term
Beta 2
Definition
Epinephrine is more potent than NorEpi at ____ receptors.
Term

Nn

Hexamethonium

Definition

Receptor between the pre and postganglionic neurons _______. These are found in the sympathetic and parasympathetic system.

It is blocked by this ganglion blocking drug ____.

Term
ligand
Definition
Nicotinic receptors are ____ gated ion channels.
Term
Muscarinic
Definition
Receptor located on the sweat glands and the parasympathetic smooth muscle and glands.
Term
Gprotein mediated increase of IP3--> increase in Ca++ in the cell.
Definition
Mechanism of action of muscarinic receptor
Term

1. reuptake

2. breakdown

Definition
2 ways that neurotransmitters are degraded.
Term
No, it is broken down too quickly
Definition
Can Ach be measured in blood plasma?
Term

Botulism

 

 Myasthenia Gravis, Neostigmine is an AchEsterase inhibitor

Definition

What blocks the release of Ach from the terminal?

 

What disease blocks the Ach receptors? What drug is used to treat and how does it work?

Term
Pesticides and Sarin gas
Definition
What 2 things can act as a AchEsterase inhibitor?
Term
Tyrosine--> L-dopa--> Dopamine--> NorEpi--> Epinephrine
Definition
These are precursors of epinephrine
Term
Yes
Definition
Can epi and norepi be measured in blood plasma and urine?
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