What role does a first-order neuron play in the passage of a sensory signal to the brain?

A. The first-order neuron carries the sensory signal to the thalamus.
B. The first-order neuron detects the stimulus and transmits a signal to the spinal cord or brain-stem.
C. The first-order neuron carries the signal to the sensory area of the cerebral cortex.
D. The soma of the first-order neuron is in the cerebral cortex and the axon terminates in the spinal cord.
E. The first-order neuron has no role in sensory signal transmission.


B. The first-order neuron detects the stimulus and transmits a signal to the spinal cord or brain-stem.

Anatomy & Physiology

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Answer the following statement true (T) or false (F)

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The "animal energy equation" for endotherms states that Einput-Eloss= EBMR+Eproduction+Eactivity+EDIT. In this equation, Eloss refers to

a. thermal energy given off as a consequence of the first law of thermodynamics. b. thermal energy given off as a consequence of the second law of thermodynamics. c. thermal energy given off as a consequence of dietary intake. d. potential energy given off in the form of undigested foodstuffs (feces), sloughed skin, hair or other body products. e. none of these.

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