Biology

Endocrine and Exocrine Glands

594 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 different stages of growth reproductive system in humans division for growth and reproduction human system biology

Ageing starts with disappearance of

  1. Spleen

  2. Pituitary gland

  3. Thymus gland

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

Ageing starts with the disappearance of thymus according to immunity theory . Thymic involution (shrinking of the thymus with age) is believed to be the main age-related change in the immune system, and this alteration begins after puberty.

So, the correct option is ‘thymus gland’.

Multiple choice zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

Wharton's duct is part of _________ gland.

  1. Parotid

  2. Submaxillary

  3. Sublingual

  4. Brunner's
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The submaxillary duct is also known as the Wharton's duct opens into the floor of the mouth. They are the major ducts of the submaxillary (submandibular gland) and help in the transfer of saliva from the submaxillary gland to the opening under the tongue.

Multiple choice zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

Epidermal glands originate from ........... layer.

  1. Stratum granulosum

  2. Stratum corneum

  3. Stratum lucidum

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

The epidermis is composed of 4 or 5 layers depending on the region of skin being considered. The Malpighian layer (stratum malpighii) is defined as both the stratum basale and stratum spinosum. In spinous layer (stratum spinosum), keratinocytes become connected through desmosomes and start to produce lamellar bodies, from within the golgi, enriched in polar lipids, glycosphingolipids, free sterols, phospholipids and catabolic enzymes. Basal/germinal layer (stratum basale/germinativum) is composed of proliferating and non-proliferating keratinocytes, attached to the basement membrane by hemidesmosomes. Melanocytes are present, connected to numerous keratinocytes in this and other strata through dendrites. Merkel cells are also found in the stratum basale with large numbers in touch-sensitive sites such as the fingertips and lips. 

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

Which one of the following pairs of organs includes only the endocrine glands?

  1. Thymus and testes

  2. Adrenal and eye

  3. Parathyroid and adrenal

  4. Pancreas and parathyroid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hormones are secreted by the endocrine system. Endocrine glands do not have ducts. Their secretions (hormones) are secreted into the bloodstream. Discrete endocrine glands - these include the pituitary (hypophysis), thyroid, parathyroid, adrenal and pineal glands. Endocrine component of glands with both an endocrine and an exocrine function- these include the kidney, pancreas and gonads. 

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

I am ductless gland. I secrete chemicals which are transported by the blood to target cells. Who am I?

  1. Endocrine gland

  2. Exocrine gland

  3. Brain

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

The gland is an endocrine gland as it released many hormones which travels to the target site cells through blood. Adrenal gland and thyroid gland are endocrine glands.

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 part of the animal body with both endocrine and exocrine function is 

  1. salivary gland

  2. stomach

  3. pancreas

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

The pancreas is a heterocrine gland containing both endocrine tissue (islets of Langerhans secreting insulin and glucagon) and exocrine tissue (acinar cells secreting digestive enzymes into ducts).

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.