Introductory Quiz

Introduction to the Endocrine System

• The endocrine system regulates homeostasis and is composed of endocrine glands that secrete hormones.
• Hormones circulate through the bloodstream and bind with target cells to elicit a specific body response.
• The endocrine system has four general functions: regulating growth and metabolism, maintaining homeostasis, controlling digestive activities, and controlling reproductive processes.
• The endocrine and nervous systems work together to control homeostasis.
• Water-soluble hormones bind to cell surface receptors and activate second messenger systems, producing faster effects than lipid-soluble hormones.
• Lipid-soluble hormones bind to intracellular receptors and may take several hours to days to take effect.
• Hormone secretion is controlled by hormonal, humoral, and nervous system methods.
• Hormones only interact with cells containing complementary receptors.
• Lipid-soluble hormones alter protein synthesis patterns and cell structure or metabolic activities.
• Water-soluble hormones activate or inhibit enzymatic activity, stimulate cell growth and muscle contraction or relaxation.
• The degree of a target cell's response to a hormone depends on the number and affinity of receptors, concentration of the hormone, and hormone interactions at the target cell.
• Cells may increase or decrease the number of receptors available through up-regulation or down-regulation.

Introduction to the Endocrine System

• The endocrine system regulates homeostasis and is composed of endocrine glands that secrete hormones.
• Hormones circulate through the bloodstream and bind with target cells to elicit a specific body response.
• The endocrine system has four general functions: regulating growth and metabolism, maintaining homeostasis, controlling digestive activities, and controlling reproductive processes.
• The endocrine and nervous systems work together to control homeostasis.
• Water-soluble hormones bind to cell surface receptors and activate second messenger systems, producing faster effects than lipid-soluble hormones.
• Lipid-soluble hormones bind to intracellular receptors and may take several hours to days to take effect.
• Hormone secretion is controlled by hormonal, humoral, and nervous system methods.
• Hormones only interact with cells containing complementary receptors.
• Lipid-soluble hormones alter protein synthesis patterns and cell structure or metabolic activities.
• Water-soluble hormones activate or inhibit enzymatic activity, stimulate cell growth and muscle contraction or relaxation.
• The degree of a target cell's response to a hormone depends on the number and affinity of receptors, concentration of the hormone, and hormone interactions at the target cell.
• Cells may increase or decrease the number of receptors available through up-regulation or down-regulation.