Chapter 16 Test

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

A

Which of the following statements concerning the preganglionic neurons of the ANS is true? A. all parasympathetic preganglionic neurons secrete ACH. B. only parasympathetic preganglionic neurons secrete ACH. C. all sympathetic preganglionic neurons secrete norepinephrine. D. only sympathetic preganglionic neurons secrete norepinephrine.

A

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

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

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. the NA+ channels open. D. the binding occurs at the effectors. E. all of these are correct.

C

Which of these events is expected if the sympathetic division is activated? A. Secretion of watery saliva increases B. Tear production increases C. air passages dilate. D. glucose release from the liver decreases E. all of these are correct

C

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

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

Which of the following statements regarding the adrenal gland is true? A. The parasympathetic division stimulates the adrenal gland to release ACH. B. The parasympathetic division stimulates the adrenal gland to release epinephrine. C. The sympathetic division stimulates the adrenal gland to release ACH. D. The sympathetic division stimulates the adrenal gland to release epinephrine.

D

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

Which of these is not 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

Given These Phrases: 1. Neuron cell bodies i the nuclei of cranial nerves 2. Neuron cell bodies in the lateral gray matter of spinal cord (s2-s4) 3. Two synapses between CNS and effectors 4. Regulates smooth muscle Which of the phrases are true for the ANS? A. 1,3 B. 2,4 C. 1,2,3 D. 2,3,4 E. 1,2,3,4

E

Nicotinic receptors are located in A. postganglionic neurons of the PSD B. post gaglionic neurons of the SD C. membranes of skeletal muscle cells D. both a and b E. all of these sites.

E

The cell bodies of the postganglionic neurons of the sympathetic division are located in the__________. a. Sympathetic chain ganglia b. collateral ganglia c. termical ganglia d. dorsal root ganglia e. both a and b

E

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

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