Biology ยท General Awareness

Human Endocrine System

1,395 Questions

The human endocrine system comprises glands that secrete hormones to regulate bodily functions like metabolism, growth, and reproduction. Competitive exams frequently test the specific roles of hormones such as adrenaline, insulin, and progesterone. Use these questions to master the locations and functions of different hormones.

Hormone functionsIslets of LangerhansFight or flight responseBlood pressure regulationFemale sex hormonesWater soluble hormones

Human Endocrine System Questions

Multiple choice

Which hormone is responsible for regulating sleep-wake cycles?

  1. Epinephrine

  2. Insulin

  3. Glucagon

  4. Melatonin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Melatonin, produced by the pineal gland, regulates sleep-wake cycles and helps maintain the body's circadian rhythm.

Multiple choice

The hormone that controls the release of hormones from the pituitary gland is:

  1. Epinephrine

  2. Insulin

  3. Glucagon

  4. Thyrotropin-releasing hormone
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thyrotropin-releasing hormone, produced by the hypothalamus, stimulates the pituitary gland to release thyroid-stimulating hormone.

Multiple choice

Which hormone is involved in the regulation of appetite and body weight?

  1. Epinephrine

  2. Insulin

  3. Glucagon

  4. Leptin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Leptin, produced by fat cells, regulates appetite and body weight by signaling the brain to reduce food intake and increase energy expenditure.

Multiple choice

Which of the following is NOT a function of testosterone in men?

  1. Stimulating sperm production

  2. Promoting facial and body hair growth

  3. Regulating mood and behavior

  4. Lowering blood pressure
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While testosterone has various functions in men, lowering blood pressure is not one of them.

Multiple choice

What is the term for the decrease in testosterone levels that occurs with age?

  1. Andropause

  2. Menopause

  3. Hypogonadism

  4. Adrenarche
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Andropause, also known as male menopause, refers to the gradual decline in testosterone production as men age.

Multiple choice

Which hormone stimulates the testes to produce testosterone?

  1. Estrogen

  2. Progesterone

  3. Luteinizing hormone (LH)

  4. Follicle-stimulating hormone (FSH)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Luteinizing hormone (LH), produced by the pituitary gland, stimulates the testes to produce testosterone.

Multiple choice

What is the role of testosterone in regulating mood and behavior in men?

  1. Promoting aggression and dominance

  2. Enhancing cognitive function and memory

  3. Improving mood and reducing stress

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Testosterone plays a role in regulating mood and behavior in men, including promoting aggression and dominance, enhancing cognitive function and memory, and improving mood and reducing stress.

Multiple choice

Which of the following hormones is responsible for regulating blood sugar levels?

  1. Insulin

  2. Glucagon

  3. Epinephrine

  4. Thyroxine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels.

Multiple choice

Which hormone is responsible for regulating the sleep-wake cycle?

  1. Melatonin

  2. Serotonin

  3. Dopamine

  4. Epinephrine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Melatonin is the hormone that regulates the sleep-wake cycle, promoting sleepiness at night and wakefulness during the day.

Multiple choice

What is the role of lipids in hormone production?

  1. They serve as precursors for hormone synthesis.

  2. They regulate hormone release.

  3. They transport hormones throughout the body.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lipids play multiple roles in hormone production. They serve as precursors for hormone synthesis, regulate hormone release, and transport hormones throughout the body.

Multiple choice

Which of the following hormones is produced by the parathyroid glands?

  1. Insulin

  2. Glucagon

  3. Parathyroid hormone (PTH)

  4. Thyroxine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Parathyroid hormone (PTH) is produced by the parathyroid glands and plays a crucial role in regulating calcium and phosphate levels in the body.

Multiple choice

Which of the following actions is NOT stimulated by parathyroid hormone (PTH)?

  1. Increasing calcium absorption from the intestines

  2. Decreasing calcium excretion by the kidneys

  3. Promoting bone resorption (breakdown)

  4. Stimulating the production of vitamin D
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parathyroid hormone (PTH) does not directly stimulate the production of vitamin D. It primarily regulates calcium and phosphate metabolism through its effects on the intestines, kidneys, and bones.

Multiple choice

What is the name of the hormone that triggers the onset of labor?

  1. Estrogen

  2. Progesterone

  3. Oxytocin

  4. Relaxin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxytocin is the hormone responsible for triggering the onset of labor and stimulating contractions of the uterus.

Multiple choice

What is the primary female sex hormone responsible for regulating the menstrual cycle and reproductive functions?

  1. Estrogen

  2. Progesterone

  3. Testosterone

  4. Insulin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Estrogen is the primary female sex hormone produced by the ovaries. It plays a crucial role in regulating the menstrual cycle, preparing the uterus for pregnancy, and maintaining reproductive health.

Multiple choice

According to the Endocrinological Theory, which hormone is often associated with aggression and dominance?

  1. Estrogen

  2. Testosterone

  3. Serotonin

  4. Dopamine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Testosterone is a hormone associated with aggression, dominance, and risk-taking behavior, and high levels of testosterone have been linked to increased criminal behavior.