1. What is the main function of an efferent pathway?
A.
To carry signals from receptors to the CNS
B.
To carry commands from the CNS to effectors
C.
To produce hormones in endocrine glands
D.
To connect bones to muscles
Correct Answer:
To carry commands from the CNS to effectors
Explanation:
Efferent pathways carry motor commands away from the brain and spinal cord to effectors such as muscles and glands.
2. Which division of the peripheral nervous system contains efferent pathways?
A.
Motor division
B.
Sensory division
C.
Receptor division
D.
Cerebrospinal division
Correct Answer:
Motor division
Explanation:
The motor division of the peripheral nervous system carries efferent signals from the CNS to muscles and glands.
3. Which structures receive signals carried by efferent pathways?
A.
Sensory receptors
B.
Effectors
C.
Cell bodies in the brain only
D.
Cranial bones
Correct Answer:
Effectors
Explanation:
Efferent pathways end at effectors, including muscles and glands, which respond to commands from the CNS.
4. The somatic motor pathway mainly controls which type of activity?
A.
Voluntary movement of skeletal muscles
B.
Secretion by all endocrine glands
C.
Digestion inside the stomach only
D.
Detection of light by the eyes
Correct Answer:
Voluntary movement of skeletal muscles
Explanation:
The somatic motor pathway is an efferent pathway that carries commands to skeletal muscles, usually for voluntary movement.
5. The autonomic motor pathway mainly controls which effectors?
A.
Skeletal muscles only
B.
Smooth muscles, cardiac muscle, and glands
C.
Bones and joints
D.
Sensory receptors only
Correct Answer:
Smooth muscles, cardiac muscle, and glands
Explanation:
The autonomic motor pathway is an efferent pathway that regulates smooth muscle, cardiac muscle, and gland activity.
6. Which nervous system division is responsible for involuntary efferent control of internal organs?
A.
Somatic nervous system
B.
Autonomic nervous system
C.
Sensory nervous system
D.
Visual nervous system
Correct Answer:
Autonomic nervous system
Explanation:
The autonomic nervous system carries efferent signals that control involuntary activities of internal organs.
7. Which part of the autonomic nervous system generally prepares the body for stressful activity?
A.
Sympathetic division
B.
Parasympathetic division
C.
Somatic sensory division
D.
Spinal sensory division
Correct Answer:
Sympathetic division
Explanation:
The sympathetic division is an autonomic efferent pathway that generally prepares the body for action during stress.
8. Which part of the autonomic nervous system generally supports rest and digestion?
A.
Sympathetic division
B.
Parasympathetic division
C.
Somatic motor division
D.
Sensory receptor division
Correct Answer:
Parasympathetic division
Explanation:
The parasympathetic division is an autonomic efferent pathway that generally supports resting activities such as digestion.
9. In which direction do efferent nerve impulses travel?
A.
From effectors to the CNS
B.
From the CNS to effectors
C.
From one sensory receptor to another
D.
From glands to sensory organs
Correct Answer:
From the CNS to effectors
Explanation:
Efferent impulses travel away from the CNS toward muscles or glands that carry out the response.
10. Which type of neuron carries commands from the CNS to an effector?
A.
Sensory neuron
B.
Motor neuron
C.
Receptor cell
D.
Photoreceptor
Correct Answer:
Motor neuron
Explanation:
Motor neurons are efferent neurons that transmit commands from the CNS to muscles or glands.
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