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11.Select the incorrect statement about the parasympathetic nervous system. a.It inhibits

Question : 11.Select the incorrect statement about the parasympathetic nervous system. a.It inhibits : 1417064

 

11.Select the incorrect statement about the parasympathetic nervous system.

a.It inhibits all cardiac muscle and smooth muscle.

b.Neurotransmitter from all its postganglionic fibers bind to muscarinic receptors.

c.Neurotransmitter from all its preganglionic fibers bind to nicotinic receptors.

d.Part of it originates in the brain

e.Part of it originates in the most inferior region of the spinal cord.

12.Which statement is correct about terminal ganglia?

a.Those on parasympathetic preganglionic fibers lie in or near the effector organ.

b.They give rise to sympathetic postganglionic fibers.

c.They are the final common pathway for the autonomic nervous system.

d.They contain muscarinic receptors.

e.They lie in a chain located along either side of the spinal cord.

13.The sympathetic nervous system

a.is always excitatory for smooth muscle

b.innervates only tissues concerned with protecting the body against challenges from the outside environment

c.dominates in rest-and-digest situations

d.contains cholinergic and adrenergic fibers

e.stimulates only effectors that are dually innervated

14.Sympathetic stimulation ____ heart rate and ____ the motility in the digestive tract.

a.does not affect; decreases

b.decreases; decreases

c.decreases; increases

d.increases; decreases

e.increases; increases

15.Parasympathetic stimulation ____ heart rate and ____ the motility in the digestive tract.

a.does not affect; increases

b.decreases; decreases

c.decreases; increases

d.increases; decreases

e.increases; increases

16.The motor end plate

a.contains receptor sites that are capable of binding curare

b.contains acetylcholinesterase

c.experiences an increase in permeability to cations when combined with acetylcholine

d.contains nicotinic receptors

e.exhibits all of the above characteristics

17.Nicotinic receptors

a.bind with acetylcholine released from parasympathetic postganglionic fibers

b.respond to acetylcholine released from sympathetic and parasympathetic preganglionic fibers

c.are found primarily in the heart

d.bind with norepinephrine released from sympathetic postganglionic fibers

e.are found on certain effectors of the parasympathetic nervous system

18.Atropine ____ the effect of acetylcholine at ____ receptors and ____ ____ receptors.

a.blocks; muscarinic; does not affect; nicotinic

b.enhances; muscarinic; does not affect; nicotinic

c.blocks; nicotinic; does not affect; muscarinic

d.enhances; nicotinic; does not affect; muscarinic

e.blocks; muscarinic; enhances; nicotinic

19.The neurotransmitter at a neuromuscular junction is

a.acetylcholine

b.the same as the transmitter substance at parasympathetic postganglionic nerve endings

c.the same as that released by all preganglionic fibers

d.all of the above

e.only a and b

20.The sympathetic nervous system causes

a.blood vessels with alpha receptors to dilate

b.bronchioles to constrict

c.pupils of the eye to dilate

d.sweat glands to be inhibited

e.the urinary bladder to contract and eliminate urine

 

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