Biology · 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 of the following statements is/are false?

a. The timings and amount of hormones released by various glands are controlled by the 'feedback mechanism that is inbuilt in our body. b. The working of endocrine glands is controlled by our nervous system. c. If the growth of a plant part is away from the stimulus, it is called positive tropism.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. If the growth of a plant part is away from the stimulus, it is called negative tropism, and not positive tropism.

Multiple choice

Which of the following is/are characteristic(s) of hormones?

  1. The hormones are secreted in small amounts by the endocrine glands.

  2. The hormones are poured directly into the blood and carried throughout the body by blood circulatory system.

  3. The hormones have their effect at the sites different from the sites where they are made.

  4. The hormones act on specific tissues or organs.

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as all of the above are the characteristics of hormones.

Multiple choice

Match the following: Name of glands|Hormone| |a. Pituitary gland|1. Parathormone| |b. Parathyroid gland|2. Oestrogen and progestrone| |c. Ovaries|3. Human growth hormone|

  1. a - 3, b - 2, c - 1

  2. a - 1, b - 2, c - 3

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 1, c - 3

  5. a - 3, b - 1, c - 2
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option. Pituitary gland secretes human growth hormone. Parathyroid gland secretes parathormone. Ovaries secrete oestrogen and progestrone.

Multiple choice

A steroid hormone produced by certain arthropods that act on DNA to initiate the synthesis of new proteins and enzymes involved in the process of moulting and cuticle formation, is called

  1. ecdysone

  2. neuro-hormone

  3. juvenile hormone

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

Ecdysone is a steroidal prohormone of the major insect molting hormone 20-hydroxyecdysone, which is secreted from the prothoracic glands. Insect molting hormones are generally called ecdysteroids

Multiple choice

The hormone which regulates the basal metabolism in our body is secreted from

  1. pituitary

  2. thyroid

  3. adernal cortex

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

The thyroid gland secretes thyroxine, which plays a vital role in regulating the body's metabolic rate, heart and digestive functions, muscle control, and brain development. Pituitary and adrenal glands have different primary regulatory roles.

Multiple choice

Which one of the following human hormones contains iodine?

  1. Adrenalin

  2. Progesterone

  3. Oxytocin

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

Thyroxin (T4) is a hormone produced by the thyroid gland that plays a crucial role in regulating the body's metabolic rate. It is unique because its molecular structure incorporates iodine atoms; specifically, T4 contains four iodine atoms. A deficiency in dietary iodine can lead to decreased thyroxin production and conditions like goiter.

Multiple choice

Which hormone decreases the heart rate?

  1. Epinephrine

  2. Norepinephrine

  3. Acetylcholine

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

Acetylcholine is a neurohormone which is secreted by neurons of parasympathetic nerves and lowers the heart rate.

Multiple choice

Why are Granulosa cells similar to Sertoli cells?

  1. Both have FSH receptors.

  2. Both have LH receptors.

  3. Both produce testosterone.

  4. Both have very low levels of cAMP.

  5. Both produce estrogen.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both types of cells have FSH receptors.