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

Some hormones such as oxytocin are produced in the hypothalamus but:

  1. Secreted by the posterior pituitary gland

  2. Secreted by the anterior pituitary gland
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxytocin is synthesized by neuronal cell bodies in the hypothalamus and transported down axons to the posterior pituitary gland. It is stored there and subsequently released into the bloodstream.

Multiple choice

Peptide hormones act by:

  1. Binding to proteins in the cell membrane of the target cell

  2. Binding to proteins in the cytoplasm of the target cell

  3. Activating a cascade mediated by a secondary messenger

  4. Promoting the transcription of specific genes in the nucleus
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Multiple choice

Steroid hormones are lipid soluble and therefore act by:

  1. Binding to proteins in the cell membrane of the target cell

  2. Binding to proteins in the cytoplasm of the target cell

  3. Activating a cascade mediated by a secondary messenger

  4. Promoting the transcription of specific genes in the nucleus
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Multiple choice

The endocrine system produces

  1. hormones

  2. enzymes

  3. killer T cells

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

The endocrine system consists of glands that secrete hormones directly into the circulatory system to regulate distant target organs. Enzymes are catalytic proteins, killer T cells are part of the immune system, and fibrins are involved in blood clotting.

Multiple choice

the endocrine system is composed of

  1. hormones

  2. glands and hormones

  3. glands

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

The endocrine system consists of glands that secrete hormones directly into the bloodstream to regulate body processes.

Multiple choice

Which two systems work together to maintain homeostasis?

  1. the endocrine system and the nervous system

  2. The receptor system and the effector system

  3. the central nervous system and the peripheral nervous system

  4. the digestive system and the respiratory system
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The nervous system and the endocrine system are the two primary control systems that communicate throughout the body to maintain homeostasis. The nervous system uses electrical signals, while the endocrine system uses hormones.

Multiple choice

What is the female hormone called?

  1. Oestrogen

  2. Testosterone
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oestrogen is the primary female sex hormone. Testosterone is primarily a male sex hormone.

Multiple choice

Thyroxine is produced by

  1. Pituitary gland

  2. Adrenal gland

  3. Thyroid gland

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

Thyroxine is a hormone produced and secreted by the thyroid gland, which is located in the neck.

Multiple choice

The male hormone is

  1. Oestrogen

  2. Testosterone

  3. Progesterone

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

Testosterone is the primary male sex hormone, responsible for the development of male secondary sexual characteristics.