Binding of a Signaling Molecule to Which Type of Receptor

question 22

Multiple Choice

Binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of ions on opposite sides of the membrane?

• A) receptor tyrosine kinase
• B) G protein-coupled receptor
• C) ligand-gated ion channel
• D) steroid receptor

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Definitions:

Leptin

A protein hormone produced by fat cells in the body that is related to eating and weight control.

Hormone

A chemical substance produced in the body that controls and regulates the activity of certain cells or organs.

Experimental Starvation

A research setting where an organism is deliberately deprived of food for a period of time to study the physiological and psychological effects.

Re-fed

Refers to the process of reintroducing food to a person or animal after a period of fasting or severe undernutrition.