Wednesday, November 20, 2024

MCQ Biology Chapter 19: CHEMICAL COORDINATION AND INTEGRATION, HS 1st year

 Which of the following is a ductless gland?

A. Sweat gland
B. Endocrine gland
C. Salivary gland
D. Sebaceous gland

Answer: B. Endocrine gland

MCQ 2:

What is the primary role of melatonin secreted by the pineal gland?
A. Regulating blood calcium levels
B. Maintaining the diurnal rhythm of the body
C. Stimulating T-lymphocyte differentiation
D. Increasing glucose uptake in cells

Answer: B. Maintaining the diurnal rhythm of the body

MCQ 3:

Which hormone is responsible for stimulating the synthesis and secretion of thyroid hormones?
A. Growth hormone
B. Adrenocorticotropic hormone
C. Thyroid-stimulating hormone
D. Melanocyte-stimulating hormone

Answer: C. Thyroid-stimulating hormone

MCQ 4:

The deficiency of which hormone leads to Diabetes Insipidus?
A. Insulin
B. Vasopressin
C. Glucagon
D. Cortisol

Answer: B. Vasopressin

MCQ 5:

Which hormone acts on the adrenal cortex to stimulate the secretion of glucocorticoids?
A. Luteinizing hormone (LH)
B. Adrenocorticotropic hormone (ACTH)
C. Prolactin
D. Oxytocin

Answer: B. Adrenocorticotropic hormone (ACTH)

MCQ 6:

The hormone responsible for increasing calcium levels in blood is:
A. Thyrocalcitonin
B. Parathyroid hormone
C. Insulin
D. Gastrin

Answer: B. Parathyroid hormone

MCQ 7:

Which hormone is secreted by the juxtaglomerular cells of the kidney?
A. Secretin
B. Atrial natriuretic factor
C. Erythropoietin
D. Cholecystokinin

Answer: C. Erythropoietin

MCQ 8:

Which condition is caused by the over-secretion of growth hormone in adults?
A. Cretinism
B. Goitre
C. Acromegaly
D. Addison's disease

Answer: C. Acromegaly

MCQ 9:

What is the primary role of insulin in glucose homeostasis?
A. Increase blood glucose levels
B. Decrease cellular glucose uptake
C. Stimulate glycogenesis
D. Stimulate gluconeogenesis

Answer: C. Stimulate glycogenesis

MCQ 10:

Which of the following hormones is secreted by the adrenal medulla?
A. Aldosterone
B. Cortisol
C. Epinephrine
D. Progesterone

Answer: C. Epinephrine

Which of the following hormones is responsible for ovulation in females?
A. Follicle-stimulating hormone (FSH)
B. Luteinizing hormone (LH)
C. Estrogen
D. Progesterone

Answer: B. Luteinizing hormone (LH)

MCQ 12:

What condition is caused by iodine deficiency leading to thyroid gland enlargement?
A. Addison’s disease
B. Graves’ disease
C. Goitre
D. Cretinism

Answer: C. Goitre

MCQ 13:

The hormone responsible for stimulating erythropoiesis is:
A. Glucagon
B. Thyroxine
C. Erythropoietin
D. Cortisol

Answer: C. Erythropoietin

MCQ 14:

Which hormone is referred to as the "anti-diuretic hormone"?
A. Oxytocin
B. Vasopressin
C. Aldosterone
D. Melatonin

Answer: B. Vasopressin

MCQ 15:

Which hormone regulates pigmentation of the skin?
A. Melatonin
B. Melanocyte-stimulating hormone (MSH)
C. Oxytocin
D. Thyroxine

Answer: B. Melanocyte-stimulating hormone (MSH)

MCQ 16:

What is the function of thyrocalcitonin (TCT)?
A. Increases blood calcium levels
B. Decreases blood calcium levels
C. Regulates water balance
D. Stimulates red blood cell production

Answer: B. Decreases blood calcium levels

MCQ 17:

Which hormone is secreted by the corpus luteum?
A. Estrogen
B. Progesterone
C. Testosterone
D. Luteinizing hormone

Answer: B. Progesterone

MCQ 18:

The primary male sex hormone produced by Leydig cells in the testis is:
A. Progesterone
B. Testosterone
C. Oxytocin
D. Cortisol

Answer: B. Testosterone

MCQ 19:

Which hormone is responsible for stimulating milk ejection during breastfeeding?
A. Prolactin
B. Oxytocin
C. Vasopressin
D. Melatonin

Answer: B. Oxytocin

MCQ 20:

Which of the following hormones stimulates glycogen breakdown in the liver?
A. Insulin
B. Glucagon
C. Adrenaline
D. Thyroxine

Answer: B. Glucagon


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