When the brain receives the message that the environment around the body is very cold, the temperature signal begins in neurons of the
a. somatic nervous system.
b. sensory nervous system.
c. autonomic nervous system.
d. central nervous system.

When the brain receives the message that the environment around the body is very cold, the temperature signal begins in neurons of the sensory nervous system.

b. sensory nervous system.

Explanation:

Cold is a stimulus from the external environment. These stimuli are captured through highly specialized cells called sensory cells; or through simple nerve endings of neurons. These nerve cells or endings can be found scattered throughout the body and sense organs (smell, taste, touch, sight and hearing), forming the sensory system. For this reason we can state that the temperature signal begins in the neurons of the sensory nervous system.

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