In the skeletal system, what is the role of the pelvic girdle?

A. Parasympathetic nervous system: The parasympathetic system promotes “rest and digest” activities, slowing the heart rate, stimulating digestion, and conserving energy. It functions in opposition to the fight-or-flight response.

B. Central nervous system: The central nervous system, consisting of the brain and spinal cord, processes and integrates information but does not directly mediate the autonomic fight-or-flight response. It coordinates signals but relies on the sympathetic system to execute them.

C. Somatic nervous system: The somatic nervous system controls voluntary movements of skeletal muscles. It does not regulate involuntary responses such as increased heart rate, dilation of pupils, or bronchodilation associated with stress.

D. Sympathetic nervous system: The sympathetic nervous system activates the fight-or-flight response by increasing heart rate, dilating airways, redirecting blood flow to muscles, and releasing adrenaline. It prepares the body for rapid, intense physical activity during stress or danger.

A. Chemoreceptors: Chemoreceptors detect chemical changes in the environment, including molecules responsible for taste and smell. They convert chemical stimuli into nerve impulses that the brain interprets as specific flavors or odors.

B. Mechanoreceptors: Mechanoreceptors respond to mechanical pressure or distortion, such as touch, vibration, and sound. They are not involved in detecting chemical stimuli like taste or smell.

C. Photoreceptors: Photoreceptors are specialized cells in the retina that respond to light. They enable vision but do not respond to chemical stimuli in the environment.

D. Thermoreceptors: Thermoreceptors detect changes in temperature, such as heat or cold, and send signals to the brain to regulate body temperature. They are not sensitive to chemical molecules involved in taste or smell.