Chemical Coordination and Integration
Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which hormone plays a key role in increasing blood glucose levels during stress?

Insulin
Cortisol
Thyroxine
Oxytocin
2

Cortisol, a glucocorticoid secreted by the adrenal cortex, increases blood glucose levels by stimulating gluconeogenesis.

Which hormone is responsible for stimulating the growth and maintenance of bones?

Parathyroid Hormone (PTH)
Calcitonin
Growth Hormone (GH)
Insulin
3

Growth hormone (GH) stimulates bone growth and maintenance by promoting cell division and protein synthesis.

Which of the following statements about the endocrine system is correct?

Hormones are secreted directly into the bloodstream.
Endocrine glands have ducts for hormone secretion.
Hormones act only on the organ that produces them.
The pituitary gland is located in the thoracic cavity.
1

Endocrine glands are ductless and release hormones directly into the bloodstream for transport to target organs.

Which of the following statements about adrenal hormones is incorrect?

Cortisol helps in metabolism and stress response.
Adrenaline increases heart rate.
Aldosterone regulates sodium and potassium balance.
Adrenal medulla secretes glucocorticoids.
4

The adrenal medulla secretes adrenaline and noradrenaline, while the adrenal cortex secretes glucocorticoids like cortisol.

Which of the following statements about parathyroid hormone (PTH) is correct?

PTH lowers blood calcium levels.
PTH is secreted by the thyroid gland.
PTH increases calcium absorption in the intestine.
PTH inhibits bone resorption.
3

PTH increases blood calcium levels by promoting calcium absorption from the intestines.

Which of the following statements about the endocrine system is correct?

Endocrine glands have ducts for hormone secretion.
Hormones act only on the organs that produce them.
Hormones are transported through the bloodstream to target organs.
The endocrine system does not interact with the nervous system.
3

Endocrine glands are ductless, and hormones travel through the bloodstream to act on target organs.

Which hormone is responsible for stimulating milk production in mammary glands?

Oxytocin
Prolactin
Estrogen
Progesterone
2

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

Which hormone is involved in the regulation of red blood cell production?

Insulin
Erythropoietin
Thyroxine
Glucagon
2

Erythropoietin, secreted by the kidneys, stimulates the bone marrow to produce red blood cells.

Which hormone is responsible for the regulation of water reabsorption in the kidneys?

Aldosterone
Vasopressin
Parathyroid Hormone (PTH)
Calcitonin
2

Vasopressin (ADH) promotes water reabsorption in the kidneys, reducing urine output and maintaining water balance.

Which hormone is secreted by the anterior pituitary and stimulates the thyroid gland?

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

TSH stimulates the thyroid gland to produce and release thyroid hormones, which regulate metabolism.

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