Endocrine system

Multiple Choice

Which gland is responsible for producing insulin to control blood sugar?

• Pituitary gland

• Thyroid gland

• Pancreas

• Adrenal gland

Multiple Select

Which of the following are characteristics of hormones?

• They are chemical messengers

• They are specific to target cells

• They travel in the bloodstream

• They are always enzymes

Multiple Choice

What is a classic example of a positive feedback mechanism in the human body?

• Oxytocin release during childbirth

• Insulin secretion after a meal

• Regulation of blood calcium

• Adrenaline release during stress

Multiple Choice

Which of the following best describes the role of negative feedback in hormone regulation?

• It amplifies the initial stimulus to increase hormone levels.

• It maintains homeostasis by shutting off the response loop when hormone levels are sufficient.

• It causes hormone levels to fluctuate randomly.

• It only occurs in the thyroid gland.