VPHY 3100 Ch 9 Exam Questions and Answers Fully Solved Latest Version

VPHY 3100 Ch 9 Exam Questions and Answers Fully Solved Latest Version 2025-2026

The ____ nervous system includes both the CNS and the PNS - Answers Autonomic

There are 12 pairs of (cranial/spinal) nerves in the PNS - Answers cranial

There are 31 pairs of (cranial/spinal) nerves in the PNS - Answers spinal

(Cranial/Spinal) nerves exit the brain in the PNS - Answers Cranial

(Cranial/Spinal) nerves exit the spinal cord in the PNS - Answers Spinal

The ____ is the region of the brain that is considered to be the command central of the ANS - Answers
hypothalamus

The (autonomic/somatic) nervous system regulates cardiac muscle, smooth muscle, and glands -
Answers autonomic

The (autonomic/somatic) nervous system controls involuntary visceral organs & blood vessels - Answers
autonomic

The central control for the (autonomic/somatic) nervous system is the frontal cortex and subcortical
structures - Answers somatic

The central control for the (autonomic/somatic) nervous system is the hypothalamus, brain stem, and
spinal cord - Answers autonomic

Name the 3 parts of the body that are the control center for the ANS - Answers 1. Hypothalamus

2. Brain stem

3. Spinal cord

Name the 2 parts of the body that are the control center for the somatic nervous system - Answers 1.
Frontal cortex

2. Subcortical structures

The (autonomic/somatic) nervous system is responsible for monitoring our internal organs - Answers
autonomic

(Afferent/Efferent) neurons of the ANS and SNS reach their target cells differently - Answers Efferent

For ANS motor neurons, the impulses must pass through an autonomic ganglion, which causes the ANS
motor neurons to have _____ innervation of target tissues - Answers pair-wise

, For ANS motor neurons, the passing of impulses through the autonomic ganglion creates a _____ fiber
that runs into the autonomic ganglion and a _____ fiber that runs out of the autonomic ganglion -
Answers preganglionic; postganglionic

(Autonomic/Somatic) motor neurons are transmitted by pre and postganglionic neurons - Answers
Autonomic

(Autonomic/Somatic) motor neurons are transmitted by the ventral root ganglion - Answers Somatic

Somatic motor neurons are transmitted to their target regions via the _______ - Answers ventral root
ganglion

Impulses from the (autonomic/somatic) motor neurons travel to smooth muscle cells - Answers somatic

Impulses from the (autonomic/somatic) motor neurons travel to organ tissues (viscera) - Answers
autonomic

For ANS motor neurons, the neurons always have (excitatory/inhibitory) connections by the
neurotransmitter _____ - Answers excitatory; acetylcholine (ACh)

For ANS motor neurons, the neurotransmitter that is released is ACh, which (excites/inhibits) the next
neuron, which means the neurons have (muscarinic/nicotinic)-ACh receptors - Answers excites, nicotinic

When impulses are generated by ANS motor neurons, ACh is released and binds to (muscarnic/nicotinic)
receptors, which causes an EPSP - Answers nicotinic

The effector organ of the somatic motor neurons are _____ cells - Answers skeletal muscle

The effector organs of the autonomic motor neurons are ____, _____, and _____ - Answers cardiac
muscle, smooth muscle, and glands

In the (autonomic/somatic) nervous system, there is only 1 neuron that goes from the CNS to the
effector organs - Answers somatic

In the (autonomic/somatic) nervous system, there are 2 neurons that go from the CNS to the effector
organs - Answers autonomic

In the (autonomic/somatic) nervous system, neurons have specialized motor end plates that transmit
that impulses to the effector organs - Answers somatic

In the (autonomic/somatic) nervous system, neurons do not have direct connections with effector
organs and transmit impulses via passing neurotransmitters to effector organs - Answers autonomic

In the (autonomic/somatic) nervous system, nerve impulses can only have excitatory effects - Answers
somatic