Shared Flashcard Set

Details

nervous system
for shu nursing biochem exam
35
Biochemistry
Undergraduate 1
11/07/2015

Additional Biochemistry Flashcards

 


 

Cards

Term
How many segments in the spinal cord?
Definition
31
Term
What is the central nervous system?
Definition
The brain and the spinal cord
Term
What part of the brain is involved in the autonomic bodily functions ie breathing, blood pressure, digestion?
Definition
Medulla oblongata
Term
the specialist membranes around the spinal cord is...?
Definition
the spinal meninges
Term
the spinal cord contains what type of nerves?
Definition
mixed nerves, sensory and motor
Term
What is the tough outermost covering of the spinal cord?
Definition
the dura mater
Term
which meninges is tightly bound to the nueral tissue and closely follows the contours of the brain?
Definition
the pia mater
Term
the posterior horns of the spinal cord contain the...?
Definition
sensory nuclei
Term
the anterior horns of the spinal cord contain the....?
Definition
somatic motor nuclei
Term
what brain structure links the nervous system and the endocrine system?
Definition
the hypothalamus
Term
what highly vascular structure adheres closely to the surface of the brain?
Definition
the choroid plexus
Term
which space does the cerebrospinal fluid circulate?
Definition
the subarachnoid space
Term
higher conscious thought and highest level processing is contained in the....?
Definition
the cerebrum
Term
voluntary control is by the ------- nervous system?
Definition
somatic
Term
the ------- part of the nervous system brings information TO the central nervous system
Definition
afferent
Term
the axon is connected to the cell body by the.....?
Definition
axon hillcock
Term
neurotransmitters are released from....?
Definition
synaptic knob
Term
where do neurons communicate with each other?
Definition
synapse
Term
what is the ion pump doing at the normal resting potential of the neuron?
Definition
two potassium in and three sodium out
Term
membrane channels that are always open are called...?
Definition
leakage or passive channels
Term
when the sodium channels are open what happens in the neuron
Definition
depolarization ie the cell becomes positively charged
Term
where can voltage regulated channels be found?
Definition
along the membrane of the axon
Term
how many pairs of cranial nerves are there?
Definition
12
Term
During saltatory conduction
Definition
action potentials occur at successive nodes along the length of the stimulated axon
Term
The all-or-none principle states that
Definition
all stimuli great enough to bring the membrane to threshold will produce identical action potentials.
Term
The sodium-potassium exchange pump
Definition
requires ATP to function.
Term
Which type of synapse dominates the nervous system?
Definition
chemical
Term
The ion needed to initiate the release of acetylcholine into the synaptic cleft is
Definition
calcium
Term
Cholinergic synapses release the neurotransmitter
Definition
acetylcholine
Term
The effect that a neurotransmitter has on the postsynaptic membrane depends on
Definition
the characteristics of the receptors.
Term
EPSPs (excitatory postsynaptic potentials) occur when
Definition
sodium channels are opened
Term
If the axolemma becomes more permeable to potassium ion
Definition
it will take a stimulus of larger magnitude to initiate an action potential.
Term
what is the function of the myelin sheath?
Definition
to increase the rate of impusle along the axon
Term
When cholinergic receptors are stimulated,
Definition
sodium ions enter the postsynaptic neuron.
Term
Which type of membrane channels are found at dendrites and the cell body
Definition
chemically regulated Na+ and K+ channels
Supporting users have an ad free experience!