Do autonomic functions,such as breathing,heart rate,and contraction of blood vessels and intestinal muscles,utilize sensory inputs?
A) No;they are internal and function regardless of inputs from the environment.
B) No;they are essential to life and must occur automatically,in spite of environmental conditions.
C) No;they are regulated only by efferent (motor)neurons,so they have no sensory inputs.
D) Yes;they can be regulated by internal sensory inputs,such as concentrations of gas or chemicals.
E) Yes;they are controlled entirely from the spinal cord and receive sensory inputs from ganglia in that region.

Question

Quizplus · Accepted Answer

Autonomic functions such as breathing, heart rate, and contraction of blood vessels and intestinal muscles can be regulated by internal sensory inputs, such as concentrations of gas or chemicals. For example, when CO2 levels rise in the blood, this is detected by chemoreceptors in the body and causes an increase in breathing rate to expel the excess CO2. Similarly, changes in blood pressure can be detected by baroreceptors and trigger adjustments in the heart rate and blood vessel diameter to maintain homeostasis.

Do Autonomic Functions,such as Breathing,heart Rate,and Contraction of Blood Vessels