Tag: thymus gland

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Questions Related to thymus gland

Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Which of these is related to the maturation of lymphocytes?

  1. Thymus

  2. Thyroid

  3. Adrenal

  4. Pituitary
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes.
B. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
C. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
D. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Which of the following glands grows to the maximum size at puberty and then diminishes gradually? 

  1. Thymus

  2. Pituitary

  3. Thyroid

  4. Adrenal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes. This gland shows maximum development in children during puberty and after that, it starts diminishing gradually and by the age of 70, it becomes a tiny structure.
B. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
C. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
D. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Endocrine gland responsible for immunity is 

  1. Pineal

  2. Thymus

  3. Pituitary

  4. Adrenal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones.
B. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes.
C. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
D. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Removal or absence of thymus in early life shall bring about

  1. Lack of lymphocytes

  2. Lack of antibodies

  3. Decreased immune response

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It shows maximum development in children during puberty and by the age of 70, it transforms into a tiny structure. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes which are associated with cell mediated immunity. It also promotes production of antibodies that induce humoral immunity.
Hence, lack of thymus gland will result in lack of lymphocytes and antibodies and decreased immune response. Thus, all the options are correct.
So, the correct answer is 'All of the above'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Which endocrine gland becomes inactive after puberty?

  1. Adrenal

  2. Pineal

  3. Thymus

  4. Pituitary
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
B. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones.
C. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes. This gland shows maximum development in children during puberty and after that, it starts diminishing gradually and by the age of 70, it becomes a tiny structure.
D. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
Hence, thymus becomes inactive after puberty.
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Hassall's corpuscles are found in

  1. Thyroid

  2. Thymus

  3. Adrenal

  4. Pineal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
B. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes.
C. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone. Adrenaline is secreted in response to stress in the body and is known as emergency hormone. Thus, adrenal gland is an emergency gland.
D. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones.
Hassall's corpuscles are known as thymic bodies. They are present in the medulla of thymus.
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

An endocrine gland that atrophies at the age of 14 - 16 years is

  1. Thyroid

  2. Thymus

  3. Pancreas

  4. Spleen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
B. Thymus gland secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes. This gland shows maximum development in children at the time of puberty (10-14 years) and after that it starts decreasing in size.
C. Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.
D. Spleen is a organ of immune system which produces blood cells.
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Which of these is correctly matched with the accompanying description?

  1. Pancreas - Delta cells of islets of Langerhans secrete a hormone which stimulates glycolysis in liver

  2. Thyroid - Hyperactivity in young children causes cretinism

  3. Thymus - Starts undergoing atrophy after puberty
  4. Parathyroid - Secretes parathormone that promotes movement of $Ca^{2+}$ ions from blood into bones during calcification
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. The delta cells of islets of Langerhans of pancreas secrete somatostatin hormone which inhibits secretion of glucagon and insulin.
B. Cretinism is the retarded mental and physical development in children due to hyposecretion of thyroid hormones.
C. Thymus gland shows maximum development in children during puberty and after that it starts degenerating.
D. Parathormone is secreted from the parathyroid hormone and increases blood calcium level by increasing the reabsorption of calcium from the bones.
So, the correct answer is 'Thymus - Starts undergoing atrophy after puberty'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Which of these has a role in immunity?

  1. Pineal gland

  2. Thymus

  3. Adrenal gland

  4. Parathyroid gland
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It contains lymphoid tissue that plays an important role in proliferation and maturation of T-lymphocytes. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes which are associated with cell mediated immunity. Thymosin also promotes formation of antibodies for humoral immunity. 
So, the correct answer is 'Thymus'.
Multiple choice zoology plants and animal hormones thymus thymus gland pineal gland and thymus

Thymosin hormone is secreted by 

  1. Thyreid

  2. Thymus

  3. Parathyroid

  4. Hypothalamus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
B. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes.
C. Parathyroid gland is present in the form of four small pouches which are embedded in the posterior surface of lobes of thyroid gland. This gland secretes parathormone which increases calcium reabsorption from the bones and causes mobilisation of calcium in the blood.
D. Hypothalamus is present in the forebrain. This gland secretes hormones that regulate the synthesis and secretion of hormones of pituitary gland. 
So, the correct answer is 'Thymus'.