A&P Chapter 16

Which of the following statements concerning the preganglionic neurons of the ANS is true? a. All parasympathetic preganglionic neurons secrete acetylcholine. b. Only parasympathetic preganglionic neurons secrete acetylcholine. c. All sympathetic preganglionic neurons secrete norepinephrine. d. Only sympathetic preganglionic neurons secrete norepinephrine.

a. All parasympathetic preganglionic neurons secrete acetylcholine.

The white ramus communicans contains a. preganglionic sympathetic fibers. b. postganglionic sympathetic fibers. c. preganglionic parasympathetic fibers. d. postganglionic parasympathetic fibers.

a. preganglionic sympathetic fibers.

Splanchnic nerves a. are part of the parasympathetic division. b. have preganglionic neurons that synapse in the collateral ganglia. c. exit from the cervical region of the spinal cord. d. travel from the spinal cord to the sympathetic chain ganglia. e. All of these are correct.

b. have preganglionic neurons that synapse in the collateral ganglia.

Which of these events is expected if the sympathetic division is activated? a. Secretion of watery saliva increases. b. Tear production increases. c. Air passageways dilate. d. Glucose release from the liver decreases. e. All of these are correct.

c. Air passageways dilate.

When acetylcholine binds to nicotinic receptors, a. the cell's response is mediated by G proteins. b. the response can be excitatory or inhibitory. c. Na+ channels open. d. the binding occurs at the effectors. e. All of these are correct.

c. Na+ channels open.

A sudden increase in blood pressure a. initiates a sympathetic reflex that decreases heart rate. b. initiates a local reflex that decreases heart rate. c. initiates a parasympathetic reflex that decreases heart rate. d. Both a and b are correct. e. Both b and c are correct.

c. initiates a parasympathetic reflex that decreases heart rate.

Given these structures: (1) collateral ganglion (2) sympathetic chain ganglion (3) white ramus communicans (4) splanchnic nerve Choose the arrangement that lists the structures in the order an action potential travels through them on the way from a spinal nerve to an effector. a. 1,3,2,4 b. 1,4,2,3 c. 3,1,4,2 d. 3,2,4,1 e. 4,3,1,2

d. 3,2,4,1

Which of the following statements regarding the adrenal gland is true? a. The parasympathetic division stimulates the adrenal gland to release acetylcholine. b. The parasympathetic division stimulates the adrenal gland to release epinephrine. c. The sympathetic division stimulates the adrenal gland to release acetylcholine. d. The sympathetic division stimulates the adrenal gland to release epinephrine.

d. The sympathetic division stimulates the adrenal gland to release epinephrine.

The sympathetic division a. is always stimulatory. b. is always inhibitory. c. is usually under conscious control. d. generally opposes the actions of the parasympathetic division. e. Both a and c are correct.

d. generally opposes the actions of the parasympathetic division.

Sympathetic axons reach organs through all of the following EXCEPT a. abdominopelvic nerve plexuses. b. head and neck nerve plexuses. c. thoracic nerve plexuses. d. pelvic splanchnic nerves. e. spinal nerves.

d. pelvic splanchnic nerves.

Which of these is NOT a part of the enteric nervous system? a. ANS motor neurons b. neurons located only in the digestive tract c. sensory neurons d. somatic motor neurons

d. somatic motor neurons

Which of these cranial nerves does NOT contain parasympathetic fibers? a. oculomotor (III) b. facial (VII) c. glossopharyngeal (IX) d. trigeminal (V) e. vagus (X)

d. trigeminal (V)

Given these phrases: (1) neuron cell bodies in the nuclei of cranial nerves (2) neuron cell bodies in the lateral gray horn of the spinal cord (T1-L2 and S2-S4) (3) two synapses between the CNS and effectors (4) regulates smooth muscle Which phrases are true for the autonomic nervous system? a. 1,3 b. 2,4 c. 1,2,3 d. 2,3,4 e. 1,2,3,4

e. 1,2,3,4

The parasympathetic division a. is also called the craniosacral division. b. has preganglionic axons in cranial nerves. c. has preganglionic axons in pelvic splanchnic nerves. d. has ganglia near or in the wall of effectors. e. All of these are correct.

e. All of these are correct.

Nicotinic receptors are located in a. postganglionic neurons of the parasympathetic division. b. postganglionic neurons of the sympathetic division. c. membranes of skeletal muscle cells. d. Both a and b are correct. e. All of these sites.

e. All of these sites.

The cell bodies of the postganglionic neurons of the sympathetic division are located in the a. sympathetic chain ganglia. b. collateral ganglia. c. terminal ganglia. d. dorsal root ganglia. e. Both a and b are correct.

e. Both a and b are correct.

Which of these structures is innervated almost exclusively by the sympathetic division? a. gastrointestinal tract b. heart c. urinary bladder d. reproductive tract e. blood vessels

e. blood vessels