Chemical Coordination and Integration
Test 2

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which hormone is secreted by the posterior pituitary and plays a role in childbirth?

Oxytocin
Prolactin
Vasopressin
Estrogen
1

Oxytocin is released by the posterior pituitary and stimulates uterine contractions during childbirth.

Which hormone is secreted by the kidney to regulate blood pressure?

Erythropoietin
Renin
Aldosterone
ANF
2

Renin, secreted by the kidney, activates the renin-angiotensin-aldosterone system (RAAS) to regulate blood pressure.

Which hormone deficiency leads to delayed puberty and infertility?

Thyroxine
Gonadotropins (LH & FSH)
Insulin
Glucagon
2

Deficiency of gonadotropins (LH & FSH) leads to delayed puberty and infertility due to impaired reproductive function.

Which of the following is a correct function of thyroid hormones?

Regulation of metabolic rate.
Promotion of calcium absorption from the intestine.
Suppression of protein synthesis.
Decreasing heart rate.
1

Thyroid hormones (T3 & T4) regulate the body's metabolic rate and energy balance.

Which of the following statements about the hypothalamus is incorrect?

It produces releasing and inhibiting hormones.
It controls the autonomic nervous system.
It directly secretes insulin into the blood.
It regulates body temperature.
3

The hypothalamus does not secrete insulin; insulin is secreted by the pancreas.

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

PTH increases calcium reabsorption from the kidneys.
PTH is secreted by the thyroid gland.
PTH stimulates calcium absorption from the intestine.
PTH is secreted when blood calcium levels are low.
2

PTH is secreted by the parathyroid gland, not the thyroid gland.

Which of the following is a function of oxytocin?

Stimulates milk ejection
Regulates blood sugar
Increases metabolic rate
Maintains calcium balance
1

Oxytocin stimulates uterine contractions during childbirth and milk ejection during lactation.

Which hormone is secreted by the adrenal cortex and plays a role in maintaining electrolyte balance?

Cortisol
Aldosterone
Adrenaline
Glucagon
2

Aldosterone, a mineralocorticoid secreted by the adrenal cortex, regulates sodium and potassium balance in the body.

Which hormone plays a key role in regulating the menstrual cycle along with estrogen?

Oxytocin
Progesterone
FSH
Prolactin
2

Progesterone works with estrogen to regulate the menstrual cycle and is essential for the maintenance of pregnancy.

Which hormone is known as an "anti-diuretic hormone"?

Aldosterone
Vasopressin
Cortisol
Erythropoietin
2

Vasopressin (ADH) reduces water loss by promoting reabsorption in the kidneys, thereby preventing excessive urination.

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