Biology

Endocrine and Exocrine Glands

690 Questions

The endocrine and exocrine glands topic explores the human body's essential secreting structures, including the pituitary, thyroid, and salivary glands. Questions often focus on gland locations, their specific secretions, and crucial physiological functions. This subject is a core component of the general science syllabus across many highly competitive examinations.

Master endocrine glandsPituitary gland locationSalivary gland functionsThyroid and ductless glandsApocrine sweat glands

Endocrine and Exocrine Glands Questions

Multiple choice zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Endocrine glands secrete their secretion in 

  1. Blood

  2. Lymph

  3. Urine

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

Endocrine glands are the part of an endocrine system that produces hormones and other secretions directly into the blood, They include pituitary gland, thyroid gland, ovaries, testis, hypothalamus, etc. Blood helps transport these hormones faster to the target organs, thereby helping in its action. So, the correct answer is option A.

Multiple choice zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Endocrine glands have _________ to carry their secretions to the specific organ.

  1. Capillaries

  2. Tubules

  3. No ducts

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

Endocrine glands lack ducts and pass their secretions into the surrounding blood for transport to the site of action. They are also called ductless glands. Their secretions are known as hormones.

Multiple choice zoology the endocrine system introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Ductless glands are also known as

  1. Salivary glands

  2. Endocrine glands

  3. Exocrine glands

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The endocrine gland is called the ductless glands because there are no ducts in the glands. The products such as hormones are secreted and goes directly to the bloodstream. So there is no need for glands to collect and distribute the products, it just goes straight to the blood. Exocrine glands are the ones that do require ducts.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Endocrine glands are also called as ................. glands.

  1. Exocrine

  2. Ductless

  3. Ducted

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. So, they are called as ductless glands. 

The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Endocrine glands

  1. Do not possess ducts

  2. Sometimes do not have ducts

  3. Pour their secretion into blood through ducts

  4. Always have ducts
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Any of various glands producing hormonal secretions that pass directly into the bloodstream is called endocrine gland. The endocrine glands include the thyroid, parathyroids, anterior and posterior pituitary, pancreas, adrenals, pineal and gonads. They are also called as the ductless glands.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

When the glandular cells breakdown completely, the gland is known as ______________.

  1. Holocrine gland

  2. Apocrine gland

  3. Merocrine gland

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is option A i.e. "Holocrine gland"
Holocrine gland is one in which the entire secreting cell is destroyed on secretion e.g. sebaceous gland
Apocrine gland are the one that secretes a viscous fluid into a hair follicle e.g. sweat glands.
Merocrine gland discharges acellular components without damage to the secreting cell e.g. sweat glands

Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

The structure present is man but absent in frog is ___________.

  1. Pancreas

  2. Thyroid gland

  3. Adrenal gland

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

Salivary glands are characteristic of mammals. Frogs and other amphibians lack true salivary glands, although they have glands that secrete mucus to moisten food.

Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Vertebrate salivary glands and exocrine part of pancreas are.

  1. Apocrine

  2. Holocrine

  3. Both A and B

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

Merocrine secretion is a process where cells release products via exocytosis without losing any part of the cell itself. Both salivary glands and the exocrine pancreas use this mechanism.

Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Which of the following statements is TRUE about glandular epithelium is salivary gland?

  1. It consists of isolated single cells

  2. It consists of multicellular cluster of cells

  3. Its secretions are endocrine

  4. It consists of squamous epithelial cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glandular epithelium in salivary glands is organized into multicellular structures known as acini or secretory units. These clusters of cells are specialized for the production and secretion of saliva, rather than existing as isolated cells or simple squamous layers.

Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Which of the following gland is present in brain stem?

  1. Hypothalamus

  2. Pituitary gland

  3. Pineal gland

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

  • The pineal gland is a small endocrine gland in the brain stem. 
  • The pineal gland produces melatonin, a serotonin-derived hormone which modulates sleep patterns in both circadian and seasonal cycles. 
  • The shape of the gland resembles a pine cone from which it derived its name.
Hence, Pineal gland is present in the brain stem.
So, the correct answer is 'Pineal gland'.