What is the primary function of the pineal gland?

A. Provide structural support to the body: Structural support is mainly provided by the skeletal system and connective tissues, not the nervous system.

B. Produce hormones for growth and development: Hormone production is the role of the endocrine system; the nervous system may influence hormone release but does not directly produce them.

C. Transmit signals between different parts of the body: The nervous system communicates via electrical and chemical signals between the brain, spinal cord, and peripheral organs, coordinating responses to stimuli and maintaining homeostasis.

D. Regulate the body's temperature: Temperature regulation is managed primarily by the hypothalamus and autonomic responses, with the nervous system playing a coordinating role rather than being the primary regulator.

A. By controlling skeletal muscle contraction: Skeletal muscles are controlled by the somatic nervous system, not the autonomic nervous system, and are responsible for voluntary movements.

B. By controlling voluntary muscle movements: Voluntary muscle control is managed by the somatic nervous system, while the ANS operates involuntarily to maintain internal balance.

C. By regulating involuntary body functions: The ANS regulates involuntary activities such as heart rate, digestion, respiratory rate, and blood pressure, maintaining homeostasis without conscious effort.

D. By producing hormones: Hormone production is primarily the function of endocrine glands; the ANS influences some glands indirectly but does not produce hormones itself.