Which of the Following Statements About Sensory Receptor Proteins Is

question 147

Multiple Choice

Which of the following statements about sensory receptor proteins is false?

• A) Ionotropic receptor proteins are either ion channels themselves or they directly influence the opening of ion channels.
• B) Photoreceptors are ionotropic.
• C) Mechanoreceptors are ionotropic.
• D) Thermoreceptors are ionotropic.
• E) Metabotropic receptors influence ion channels indirectly through second messengers.

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Definitions:

Sympathetic Nervous System

A part of the autonomic nervous system that prepares the body for rapid action in threats, often referred to as the "fight or flight" response.

Ventral Hypothalamus

A portion of the hypothalamus associated with regulating metabolism, temperature, and various autonomic functions.

Parasympathetic Nervous System

Part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Lateral Hypothalamus

A region of the hypothalamus implicated in hunger motivation and stimulation of eating behavior.