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 Multiple Choice QuestionsMultiple Choice Questions

21.

A person is having problems with calcium and phosphorus metabolism in his body. Which one of following glands may not be functioning properly?

  • Parathyroid

  • Parotid

  • Pancreas

  • Pancreas


A.

Parathyroid

The parathormone secreted by parathyroid hormone regulates the calcium and phosphate balance between the blood and other tissues.

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22.

Physiologically active thyroxine exists in which of the following form ?

  • Unbound

  • Bound to albumin

  • Bound to globulin

  • All of the above


A.

Unbound

Once the thyroxine is in the circulation, it binds to albumin. Only the free unbound form of thyroxine is physiologically active.


23.

Secretin hormone is secreted by :

  • liver

  • pancreas

  • intestine

  • Brunner's glands


D.

Brunner's glands

Secretin is a hormone secreted by Brunner's glands in the wall of duodenum and jejunum under stimulus of acidic food coming from the stomach. The acidity is due of HCl.

Liver secretes and synthesizes 4 hormones. They are Insulin, Growth Factor- 1 (IGF-1), Angiotensinogen and Thromopoietin.

Pancreas secrete hormones such as insulin, somatostatin, gastrin and glucagon.


24.

Compared to a bull a bullock is docile because of

  • higher levels of thyroxin

  • higher levels of cortisone

  • lower levels of blood testosterone

  • lower levels of blood testosterone


C.

lower levels of blood testosterone

Testis are degenerated in bullock due to which testosterone level in blood is reduced. This hormone promotes the growth of many body tissues such as muscles.

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25.

Feeling the tremors of an earthquake a scared resident of the seventh floor of a multistoryed building starts climbing down the stairs rapidly. Which hormone initiated this action?

  • Thyroxin

  • Adrenaline

  • Glucagon

  • Glucagon


B.

Adrenaline

Adrenalin hormone is responsible for the action, as adrenalin hormone is known as 3F hormone. 

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26.

The most accepted theory of ageing is :

  • less RBC in blood

  • thymus gland becomes non-functional

  • brain cells die with ageing

  • all of the above


B.

thymus gland becomes non-functional

Ageing is a progressive deterioration in structure and function of cells and tissues with age. According to the immunity theory of ageing due to decline of thymus, immunity decreases resulting in more diseases, damage and destruction of cells and tissues.


27.

Neurohypophysis secretes

  • ADH and oxytocin

  • oxytocin and estrogen

  • vasopressin and GH

  • vasopressin and estrogen


A.

ADH and oxytocin

Neurohypophysis is the posterior lobe of pituitary. It consists of supporting cells called pituicytes. Its hypothalamic neurons secrete two octapeptide hormones namely antidiuretic hormone (ADH) and oxytocin.


28.

Damage to thymus in a child may lead to

  • a reduction in haemoglobin content of blood

  • a reduction in stem cell production

  • loss of antibody mediated immunity

  • loss of cell mediated immunity


D.

loss of cell mediated immunity

Thymus gland is located in the upper part of thorax near the heart. It is a bilobed, pinkish gland. It secretes thymosin hormone, thymic humoral factor and thymopoietin. 

Proliferation of lymphocytes and differentiation of these lymphocytes into a variety of clones are induced by these factors. These clones are differentially specialized to destroy different specific category  of antigens and pathogens. Therefore, thymus gland brings fourth T- lymphocytes for cell mediated immunity.


29.

Assertion: Our body secretes adrenaline in intense cold.

Reason: Adrenaline raises metabolic rate.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


A.

If both assertion and reason are true and reason is the correct explanation of assertion

Adrenaline is a catecholamine hormone, also known as epinephrine, secreted by the mammalian adrenal medulla as well as the adrenergic nerve endings. Its secretion is stimulated by the sympathetic nervous system under conditions of stress. Adrenaline stimulates blood flow to skeletal muscles and increases blood glucose levels. It also raises metabolic rate.


30.

Hormones secreted by pancreas are:

  • ACTH

  • oxytocin

  • LH and FSH

  • insulin and glucagon


D.

insulin and glucagon

β- cells of islets of Langerhans of pancreas produce the hormone insulin. It's chief physiological action is to adjust blood glucose by decreasing the levei i.e., opposite to that of glucagon which is a product of α- cells of pancreas.