Biology ยท General Awareness

Human Endocrine System

1,530 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 produced by the adrenal glands?

  1. Cortisol

  2. Aldosterone

  3. Epinephrine (adrenaline)

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

The adrenal glands produce cortisol, aldosterone, and epinephrine (adrenaline).

Multiple choice

Which hormone is produced by the pituitary gland?

  1. Growth hormone

  2. Prolactin

  3. Adrenocorticotropic hormone (ACTH)

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

The pituitary gland produces growth hormone, prolactin, adrenocorticotropic hormone (ACTH), and other hormones.

Multiple choice

What is prolactinoma?

  1. A tumor of the pituitary gland that produces excessive prolactin

  2. A tumor of the pituitary gland that produces insufficient prolactin

  3. A tumor of the adrenal gland that produces excessive prolactin

  4. A tumor of the adrenal gland that produces insufficient prolactin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Prolactinoma is a tumor of the pituitary gland that produces excessive prolactin, leading to a variety of symptoms including galactorrhea (milk production in non-pregnant women) and menstrual irregularities.

Multiple choice

Which hormone is produced by the parathyroid glands?

  1. Parathyroid hormone (PTH)

  2. Calcitonin

  3. Vitamin D

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

The parathyroid glands produce parathyroid hormone (PTH), which regulates calcium and phosphate levels in the blood.

Multiple choice

What is the hormone that regulates blood sugar levels?

  1. Insulin

  2. Glucagon

  3. Epinephrine

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

Insulin is the hormone that regulates blood sugar levels. It is produced by the pancreas.

Multiple choice

Which hormone is responsible for the production of breast milk?

  1. Estrogen

  2. Progesterone

  3. Prolactin

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

Prolactin is the primary hormone responsible for stimulating and maintaining milk production in the breasts. It is produced by the pituitary gland during pregnancy and after childbirth.

Multiple choice

What is the role of lipids in hormone production?

  1. They serve as precursors for hormone synthesis.

  2. They regulate the release of hormones.

  3. They transport hormones throughout the body.

  4. They bind to hormones and activate them.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lipids, particularly cholesterol, serve as precursors for the synthesis of various hormones in the body. For example, cholesterol is the precursor for the steroid hormones, such as testosterone, estrogen, and cortisol. These hormones play crucial roles in regulating a wide range of physiological processes, including growth, development, and reproduction.

Multiple choice

Which of the following is an example of a steroid hormone?

  1. Insulin

  2. Epinephrine

  3. Thyroxine

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

Testosterone is an example of a steroid hormone. Steroid hormones are derived from cholesterol and are involved in a variety of physiological processes, including growth, development, and reproduction. Testosterone is a sex hormone that is primarily produced in the testes of males and is responsible for the development of male characteristics.

Multiple choice

Which hormone is often referred to as the "stress hormone" due to its role in the body's response to stress?

  1. Epinephrine

  2. Endorphin

  3. Serotonin

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

Epinephrine, also known as adrenaline, is released during stressful situations and prepares the body for a "fight or flight" response.

Multiple choice

Which molecule is responsible for transmitting signals from one cell to another?

  1. Ligand

  2. Receptor

  3. Neurotransmitter

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

A ligand is a molecule that binds to a receptor on the surface of a cell, triggering a cellular response.

Multiple choice

Which type of receptor is responsible for detecting chemical signals?

  1. G-protein coupled receptor

  2. Ion channel receptor

  3. Nuclear receptor

  4. Kinase-linked receptor
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

G-protein coupled receptors are responsible for detecting and transmitting signals from various chemical ligands.

Multiple choice

Which type of cell signaling involves the release of hormones into the bloodstream?

  1. Autocrine signaling

  2. Paracrine signaling

  3. Endocrine signaling

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

Endocrine signaling involves the release of hormones into the bloodstream, which then travel to target cells in distant parts of the body.

Multiple choice

Which personal care product ingredient is known for its endocrine-disrupting effects?

  1. Parabens

  2. Phthalates

  3. Triclosan

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

Phthalates are a group of chemicals commonly used in personal care products as plasticizers. They have been associated with endocrine-disrupting effects, particularly in the reproductive system.

Multiple choice

Which hormone stimulates the breakdown of glycogen to glucose-1-phosphate?

  1. glucagon

  2. insulin

  3. epinephrine

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

Glucagon stimulates the breakdown of glycogen to glucose-1-phosphate.

Multiple choice

Which structure in the diencephalon is responsible for releasing hormones that control other endocrine glands?

  1. Thalamus

  2. Hypothalamus

  3. Pituitary gland

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

The hypothalamus produces releasing hormones that regulate the secretion of hormones from the pituitary gland.