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MDCAT
Biology
2016

Biology · Coordination and Control

Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive drills and topic analytics.

Question

Which of the following types and functions of the neuron is correct?

MDCAT Biology question — Coordination and Control
Options
  • A

    Sensory neurons carry impulses from sensory receptors to the CNS; interneurons relay signals within the CNS; motor neurons transmit impulses from the CNS to muscles or glands

  • B

    Motor neurons carry sensory impulses to the CNS; interneurons transmit impulses to muscles; sensory neurons relay signals within the CNS

  • C

    Interneurons carry impulses from effectors to the CNS; sensory neurons transmit impulses from the CNS to interneurons; motor neurons pass signals within the CNS

  • D

    Sensory neurons transmit impulses from the CNS to effectors; motor neurons carry sensory information to the CNS; interneurons connect sensory to motor neurons outside the CNS

Explanation

Sensory neurons function to carry the sensory information to the CNS. Interneurons transfer impulses from sensory to motor neurons, remaining within the CNS. Motor neurons are neurons that transmit impulses fromthe CNS to the effectors.

This option correctly describes the roles of sensory, interneurons, and motor neurons in the nervous system.

This option incorrectly assigns the functions of motor, interneurons, and sensory neurons, mixing up their roles.

This option incorrectly describes the pathways of interneurons, sensory neurons, and motor neurons, misrepresenting their functions.

This option reverses the functions of sensory and motor neurons and misplaces the role of interneurons.

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Tagged under Biology · Coordination and Control · 2016