Chapter 16 Autonomic Nervous System

Question 1

Given these phrases:

1) neuron cell bodies in the nuclei of cranial nerves
2) neuron cell bodies in the lateral gray matter of the spinal cord (S2-S4)
3) 2 synapses between the CNS and effectors
4) regulates smooth muscle

Which of the phrases are TRUE for the ANS?

Answer 1

1, 2, 3, 4

Question 2

Given these structures:

1) collateral ganglion
2) sympathetic chain ganglion
3) white ramus communicans
4) splanchnic nerve

Arrange the list in the order an action potential travels through them on the way from a spinal nerve to an effector.

Answer 2

3, 2, 4, 1

3) white ramus communicans
2) sympathetic chain ganglion
4) splanchnic nerve
1) collateral ganglion

Question 3

The white ramus communicans contains

1) preganglionic sympathetic fibers
2) postganglionic sympathetic fibers
3) preganglionic parasympathetic fibers
4) postganglionic parasympathetic fibers

Answer 3

1) preganglionic sympathetic fibers

Question 4

The cell bodies of the postganglionic neurons of the sympathetic division are located in the

1) sympathetic chain ganglia
2) collateral ganglia
3) terminal ganglia
4) dorsal root ganglia
5) both 1 and 2

Answer 4

both 1 and 2

sympathetic chain ganglia and collateral ganglia

Question 5

Splanchnic nerves

1) are part of the parasympathetic division
2) have preganglionic neurons that synapse in the collateral ganglia
3) exit from the cervical region of the spinal cord

Answer 5

2) have preganglionic neurons that synapse into the collateral ganglia

Question 6

Which of the following statements regarding the adrenal gland is TRUE?

1) The parasympathetic division stimulates the adrenal glad to release ACh
2) The parasympathetic division stimulates the adrenal glad to release epinephrine.
3) The sympathetic division stimulates the adrenal glad to release ACh.
4) The sympathetic division stimulates the adrenal glad to release epinephrine

Answer 6

4) The sympathetic division stimulates the adrenal glad to release epinephrine

Question 7

The parasympathetic division

1) is also called the craniosacral division
2) has preganglionic axons in cranial nerves
3) has preganglionic axons in pelvis splanchnic nerves
4) has ganglia near or in the wall of effectors
5) all of these

Answer 7

5) all of these

1) is also called the craniosacral division
2) has preganglionic axons in cranial nerves
3) has preganglionic axons in pelvis splanchnic nerves
4) has ganglia near or in the wall of effectors

Question 8

Which of these is NOT a part of the enteric nervous system?

1) ANS motor neurons
2) neurons located only in the digestive system
3) sensory neurons
4) somatic motor neurons

Answer 8

4) somatic motor neurons

Question 9

Sympathetic axons reach organs through all of the following except

1) abdominopelvis nerve plexus
2) head and neck nerve plexuses
3) thoracic nerve plexuses
4) pelvic splanchnic nerves
5) spinal nerves

Answer 9

4) pelvic splanchnic nerves

Question 10

Which of these cranial nerves does NOT contain parasympathetic fibers?

1) oculomotor (I)
2) facial (VII)
3) glossopharyngeal (IX)
4) trigeminal (V)
5) vagus (X)

Answer 10

4) trigeminal (V)

Question 11

Which of these events is expected if the sympathetic division is activated?

1) secretion of watery saliva increases
2) tear production increases
3) air passageways dilate
4) glucose release from the liver decreases
5) all of these

Answer 11

3) air passageways dilate

Question 12

Which of the following statements concerning the preganglionic neurons of the ANS is true?

1) all parasympathetic preganglionic neurons secrete ACh
2) only parasympathetic preganglionic neurons secrete ACh
3) All sympathetic pregang. neurons secrete norepinephrine
4) Only sympathetic pregang. neurons secrete norepinephrine

Answer 12

1) all parasympathetic preganglionic neurons secrete ACh

Question 13

When ACh binds to nicotinic receptors

1) the cell’s response is mediated by G proteins
2) the response can be excitatory or inhibitory
3) Na+ channels open
4) the binding occurs at the effectors
5) all of these

Answer 13

3) Na+ channels open

Question 14

Nicotinic receptors are located in

1) postgang. neurons of the parasymp. division
2) postgang. neurons on the symp. division
3) membranes on the skeletal muscle cells
4) all of these

Answer 14

4) all of theses

1) postgang. neurons of the parasymp. division
2) postgang. neurons on the symp. division
3) membranes on the skeletal muscle cells

Question 15

The sympathetic division

1) is always stimulatory
2) is always inhibitory
3) is usually under conscious control
4) generally opposes the actions of the parasympathetic division
5) 1 and 3

Answer 15

4) generally opposes the actions of the parasympathetic division

Question 16

A sudden increase in blood pressure

1) initiates a sympathetic reflect that decreases heart rate
2) initiates a local reflex that decreases heart rate
3) initiates a parasymp. reflex that decreases heart rate
4) 1 and 2
5) 2 and 3

Answer 16

3) initiates a parasymp. reflex that decreases heart rate

Question 17

Which of these structures is innervated almost exclusively by the symp. division?

1) gastro. intest. tract
2) heart
3) urinary bladder
4) reproductive tract
5) blood vessels

Answer 17

blood vessels