In homeostatic regulation of body temperature. Select one: a. Shivering helps to rid the body of excess heat. b. Positive feedback keeps the body temperature near the set point. c. The homeostatic sensor for regulating body temperature is found in the hypothalamus. d. Humans are classified as ecothermic e. Sending more blood to the liver helps to cool the body In a thin section through brain tissue you see a cell that is wrapped around the axon of a neuron, forming concentric layers of plasma membrane. This cell most likely Select one: a. A Shwannn Cell b. supplies nutrients to neurons. c. gives structural support to the axon. d. insulates the axon for rapid conduction of action potentials. e. recycles neurotransmitter in the synapses.
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The hypothalamus and core thermoreceptors notice if body temperature is too low. The hypothalamus signals smooth muscle in blood vessels to vasoconstrict and skeletal muscle to shiver. This activity causes body temperature to rise, which is again noticed by the hypothalamus and core thermoreceptors. As a result, the hypothalamus turns off these heat gain mechanisms.
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An example of a homeostatic response is: a. an increase in body temperature that results from fever. b. an increase in body temperature that results from involuntary shivering. c. a decrease in body temperature that results from shock. d. an increase in body temperature that results from exercise. e. the rising sun causing an increase in body temperature in a stationary animal
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