Chemical Coordination and Integration Chapter-Wise Test 9

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which hormone is secreted by the pineal gland and regulates the sleep-wake cycle?

Melatonin
Oxytocin
Prolactin
Vasopressin
1

Melatonin, secreted by the pineal gland, regulates circadian rhythms, including the sleep-wake cycle.

Which endocrine gland plays a major role in immune system development?

Thymus
Thyroid
Adrenal gland
Pineal gland
1

The thymus secretes thymosins, which are essential for T-cell differentiation and immune system development.

Which hormone is secreted by the kidneys in response to low oxygen levels in the blood?

Erythropoietin
Aldosterone
Renin
Vasopressin
1

Erythropoietin is secreted by the kidneys to stimulate red blood cell production in response to low oxygen levels.

Which hormone is secreted in response to low blood sugar levels?

Insulin
Glucagon
Aldosterone
TSH
2

Glucagon is secreted by the pancreas in response to low blood sugar levels, promoting glycogenolysis and gluconeogenesis.

Which hormone deficiency leads to a condition called diabetes insipidus?

Insulin
Vasopressin
Aldosterone
Cortisol
2

Diabetes insipidus is caused by a deficiency of vasopressin (ADH), leading to excessive urination and dehydration.

Which of the following statements about the pancreas is incorrect?

It has both endocrine and exocrine functions.
It secretes insulin from beta cells.
It secretes glucagon from delta cells.
It plays a role in blood sugar regulation.
3

Glucagon is secreted by the alpha cells of the pancreas, not the delta cells.

Which of the following statements about oxytocin is incorrect?

Oxytocin stimulates uterine contractions during labor.
Oxytocin promotes milk ejection from mammary glands.
Oxytocin is secreted by the anterior pituitary.
Oxytocin secretion is regulated by a positive feedback mechanism.
3

Oxytocin is secreted by the posterior pituitary, not the anterior pituitary.

Which hormone deficiency causes goiter?

Insulin
Thyroxine
Parathyroid Hormone (PTH)
Cortisol
2

Deficiency of thyroxine (T4) due to iodine deficiency leads to goiter, which is an enlargement of the thyroid gland.

Which hormone is responsible for milk production in lactating mothers?

Oxytocin
Prolactin
Estrogen
FSH
2

Prolactin, secreted by the anterior pituitary, stimulates milk production in the mammary glands.

Which hormone is secreted by the pancreas and acts to increase blood glucose levels?

Glucagon
Insulin
Somatostatin
Cortisol
1

Glucagon, secreted by the pancreas, increases blood glucose levels by promoting glycogen breakdown.

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