Chemical Coordination and Integration
Test 4

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which disorder is caused by excessive secretion of growth hormone in adulthood?

Gigantism
Acromegaly
Dwarfism
Myxedema
2

Acromegaly is caused by excessive secretion of GH in adults, leading to abnormal growth of bones and tissues.

Which hormone is released by the stomach and stimulates appetite?

Leptin
Ghrelin
CCK
Secretin
2

Ghrelin, secreted by the stomach, is known as the "hunger hormone" as it stimulates appetite.

Which of the following is an incorrect statement regarding the hypothalamus?

It controls the pituitary gland.
It produces releasing and inhibiting hormones.
It directly secretes TSH into the bloodstream.
It regulates homeostasis.
3

The hypothalamus does not secrete TSH; instead, it secretes Thyrotropin-releasing hormone (TRH), which stimulates the pituitary to release TSH.

Which of the following statements about insulin is correct?

Insulin increases blood glucose levels.
Insulin deficiency leads to diabetes insipidus.
Insulin promotes glucose uptake by cells.
Insulin is secreted by the alpha cells of the pancreas.
3

Insulin, secreted by beta cells of the pancreas, promotes glucose uptake by cells and helps lower blood sugar levels.

Which of the following statements about glucagon is incorrect?

Glucagon is secreted by alpha cells of the pancreas.
Glucagon decreases blood glucose levels.
Glucagon promotes glycogen breakdown in the liver.
Glucagon has an opposite effect to insulin.
2

Glucagon increases blood glucose levels by promoting glycogen breakdown in the liver.

What is the primary function of insulin?

Increase blood glucose levels
Lower blood glucose levels
Promote glycogenolysis
Stimulate gluconeogenesis
2

Insulin promotes glucose uptake by cells and helps lower blood sugar levels.

Which hormone stimulates the contraction of the gallbladder and the release of bile?

Gastrin
Cholecystokinin (CCK)
Secretin
GIP
2

Cholecystokinin (CCK) stimulates the contraction of the gallbladder, leading to the release of bile for fat digestion.

Which hormone stimulates the release of pancreatic enzymes and bile secretion?

Gastrin
Secretin
Cholecystokinin (CCK)
Vasopressin
3

CCK stimulates the pancreas to release digestive enzymes and also triggers the gallbladder to release bile.

Which hormone is secreted by the anterior pituitary and stimulates the adrenal cortex?

Thyroid-stimulating hormone (TSH)
Adrenocorticotropic hormone (ACTH)
Luteinizing hormone (LH)
Follicle-stimulating hormone (FSH)
2

ACTH stimulates the adrenal cortex to produce glucocorticoids like cortisol, which helps in stress response and metabolism.

Which gland is responsible for secreting thymosins, which aid in immune function?

Thyroid
Thymus
Adrenal gland
Pituitary gland
2

The thymus gland secretes thymosins, which promote the development of T-lymphocytes for immune function.

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