What happens as a result of Ca++ ion flow at a presynaptic terminal? (draw it out..it may...

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Medical Sciences

What happens as a result ofCa++ ion flow at a presynaptic terminal? (drawit out..it may help)

a) synaptic vesicles migrate to theplasma membrane and release acetylcholine.

      b)acetylcholine is passively transported from thepresynaptic neuron.

      c)acetylcholine is actively transported to the postsynapticneuron.

      d)ligand-gated sodium channels open.

      e)sodium ions diffuse into the cell.

Which of the following statements istrue?   Metabolicpathways  ____________.

a) occur in a controlled series ofchemical reactions    b) are controlled byenzyme activity

c) only assemble molecules fromatoms   d) all of the above aretrue   

e) only a and b are true

You react to an odor byvomiting.  This information was processed in the ________ofthe            _________.

      a)   temporallobe; cerebralcortex     b)  thalamus;cerebellum   

      c)   reticulo-spinaltract; nervous system   d)  frontal lobe;cerebellum      

      e)   none of theabove

Your reaction to the above odor would _______.

      a)  be areflex              b)  utilizeboth afferent and efferentpathways     

      c)  utilize bothsensoryand  motor  pathways      d)  twoof the above     e)  all of theabove

What is the receptor type used by the post ganglionic neuron ofthe para-sympatheticsystem        at thecardiac synapse?

  a) cholinergic; nicotinic   b)adrenergic; alpha    c) cholinergic;muscarinic   d) adrenergic; beta  

Your blood pressure suddenly decreases.  What nucleusor nuclei in the central nervous system provides the stimulus tospeed the heart rate and restore pressure?

      a)  cardio-excitatorycenter   b) basalnuclei   c)  pons   d)  cerebellum  e)  noneof the above

      

Answer & Explanation Solved by verified expert
4.0 Ratings (692 Votes)
1Option b acetylcholine is passively transported from the presynaptic neuron Neurotransmitters are made in the cell body of the neuron and then transported down the axon to the axon terminalNeurotransmitters are released from the axon terminal when their vesicles fuse with the membrane of the axon terminal spilling the    See Answer
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