Tag: endocrine system and chemical co-ordination

Questions Related to endocrine system and chemical co-ordination

A person without thymus would not be able to

zoology endocrine system and chemical co-ordination thymus thymus gland pineal gland and thymus

  1. Reject a tissue transplant

  2. Receive a tissue transplant

  3. Develop an inflammatory response

  4. Produce antibodies

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Correct Option: A
Explanation:
Thymus gland is a lobular structure which is present on the dorsal side of the heart and aorta. It plays an important role in the development of immune system. It contains lymphoid tissue which is involved in the proliferation and maturation of T-lymphocytes.
Hence, a person without thymus would not be able to reject a tissue transplant because as the immune system won't be developed, there will be no autoimmune response to reject the transplant. The T-lymphocytes which can distinguish between self and non-self, will not be produced. So, the transplant won't get rejected by the body.
So, the correct answer is 'Reject a tissue transplant'.

If thymectomy is done during adult hood then what possibility is there?

zoology endocrine system and chemical co-ordination thymus thymus gland pineal gland and thymus

  1. Immunosuppresant

  2. Die immediately

  3. No advice reaction

  4. Myasthenia gravis

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Correct Option: A
Explanation:

The thymus gland plays an important role in the immune function of the body by acting as an reservoir for T cells. Thymectomy or removal of the thymus gland in new born does not show any effect. However, the removal of the thymus gland during adulthood will result in suppression of the immune system. 

So, the correct option is 'Immunosuppresant'.

Which glands helps to maintain immunity

zoology endocrine system and chemical co-ordination thymus thymus gland pineal gland and thymus

  1. Hypothalamus

  2. Adrenal

  3. Thymus

  4. Pancreas

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Correct Option: C
Explanation:

Thymosins secreted by thymus  play a major role in the differentiation of T-lymphocytes, which provide cell-mediated immunity. In addition, thymosins also promote production of antibodies to provide humoral immunity.

Hassall corpuscles are characteristic of

zoology endocrine system and chemical co-ordination thymus thymus gland pineal gland and thymus

  1. Thymus

  2. Adrenal

  3. Pineal

  4. Pancreas

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Correct Option: A
Explanation:

Hassall's corpuscles also called thymic corpuscles, are structures found in the medulla of the human thymus, formed from eosinophilic type VI epithelial reticular cells, arranged concentrically.
Thus, the correct answer is option (A), 'Thymus'.

The endocrine gland related to the immune system is ____.

zoology endocrine system and chemical co-ordination thymus thymus gland pineal gland and thymus

  1. Thyroid

  2. Thymus

  3. Adrenal

  4. Pineal

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Correct Option: B
Explanation:
The thymus gland, despite containing glandular tissue and producing several hormones, is much more closely associated with the immune system than with the endocrine system. The thymus serves a vital role in the training and development of T-lymphocytes or T cells, an extremely important type of white blood cell.

So, the correct answer is 'Thymus'.

Pineal gland is located on the 

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. Ventral side of forebrain

  2. Lateral side of forebrain

  3. Dorsal side of forebrain

  4. Ventral side of midbrain

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Correct Option: C

Serotonin and Melatonin are hormones, secreted by.

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. Pancreas

  2. Pineal body

  3. Pituitary gland

  4. Thymus

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Correct Option: B

Daily rhythms are associated with

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. Pituitary gland

  2. Thymus

  3. Pineal gland

  4. Hypothalamus

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Correct Option: C
Explanation:
A. 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.
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. Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones. Melatonin is derived from amino acid tryptophan and secreted from pineal gland. It regulates the 24 hour rhythm of our body like sleep-wake cycle, temperature etc. and also affects metabolism and pigmentation.
D. Hypothalamus is present in the forebrain. This gland secretes hormones that regulate the synthesis and secretion of hormones of pituitary gland. 
Hence, daily rhythms are associated with pineal gland. 
So, the correct answer is 'Pineal gland'.

Which of the following statements is correct?

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. Argentaffin cells produce serotonin

  2. Villikinin is secreted by large intestine

  3. In cheilosis, deficient nutrient is nicotinamide

  4. Bleeding disease occurs due to deficiency of vitamin E

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Correct Option: A

Which one produces serotonin hormone in pancreas?

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. $\alpha$-cells

  2. $\beta$-cells

  3. $\delta$-cells

  4. $\gamma$-cells

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Correct Option: C