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2026/2027
,Nervous System Organization
1. Which division of the nervous system consists of the brain and spinal cord?
A) Peripheral nervous system
B) Central nervous system
C) Somatic nervous system
D) Autonomic nervous system
Answer: B) Central nervous system
The central nervous system includes the brain and spinal cord, while the
peripheral nervous system includes cranial and spinal nerves.
2. The afferent division of the peripheral nervous system primarily does what?
A) Carries motor commands to muscles
B) Transmits sensory information toward the central nervous system
C) Controls only involuntary smooth muscle
D) Releases hormones into the bloodstream
Answer: B) Transmits sensory information toward the central nervous
system
Afferent means toward the center, so sensory information travels from
receptors to the central nervous system.
3. Which nervous system subdivision primarily controls voluntary skeletal
muscle contractions?
A) Somatic nervous system
B) Autonomic nervous system
C) Enteric nervous system
D) Parasympathetic nervous system
, Answer: A) Somatic nervous system
The somatic nervous system controls voluntary movements of skeletal
muscles.
4. Which nervous system subdivision is primarily responsible for involuntary
control of cardiac muscle, smooth muscle, and glands?
A) Somatic nervous system
B) Autonomic nervous system
C) Central nervous system only
D) Afferent division only
Answer: B) Autonomic nervous system
The autonomic nervous system regulates involuntary effectors such as
cardiac muscle, smooth muscle, and glands.
5. The enteric nervous system is best described as which of the following?
A) A division of the somatic nervous system
B) A network of neurons in the gastrointestinal tract
C) A group of cranial nerves that control vision
D) A part of the spinal cord white matter
Answer: B) A network of neurons in the gastrointestinal tract
The enteric nervous system is a specialized neural network that helps
regulate digestive tract function.
6. Which functional division carries signals from the central nervous system to
effectors?
A) Afferent division
B) Efferent division