Chemical Coordination and Integration
Test 5

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which hormone is responsible for milk ejection during breastfeeding?

Progesterone
Oxytocin
Prolactin
Estrogen
2

Oxytocin, secreted by the posterior pituitary, stimulates the contraction of mammary ducts for milk ejection.

Which hormone is secreted by adipose tissue and helps regulate body weight?

Leptin
Ghrelin
Cortisol
Insulin
1

Leptin is secreted by adipose tissue and plays a key role in regulating appetite and body weight.

Which of the following statements about the pituitary gland is correct?

The anterior pituitary produces growth hormone.
The posterior pituitary synthesizes oxytocin.
The pituitary gland is also known as the master gland.
Both A and C.
4

The anterior pituitary produces growth hormone, and the pituitary is called the "master gland" because it regulates other endocrine glands.

Which of the following is an incorrect statement regarding melatonin?

Melatonin is secreted by the pineal gland.
Melatonin regulates the sleep-wake cycle.
Melatonin increases during daylight hours.
Melatonin levels are higher at night.
3

Melatonin secretion increases during the night and decreases during daylight hours.

Which of the following is an incorrect statement about adrenaline?

Adrenaline is secreted by the adrenal medulla.
Adrenaline decreases heart rate and blood pressure.
Adrenaline is also called epinephrine.
Adrenaline prepares the body for a "fight or flight" response.
2

Adrenaline increases heart rate and blood pressure, not decreases it.

Which of the following statements about the hypothalamus is correct?

The hypothalamus directly secretes thyroid-stimulating hormone (TSH).
The hypothalamus regulates the pituitary gland.
The hypothalamus does not produce hormones.
The hypothalamus only controls temperature regulation.
2

The hypothalamus regulates the pituitary gland by producing releasing and inhibiting hormones.

Which hormone is secreted by the corpus luteum after ovulation?

Estrogen
Progesterone
Oxytocin
FSH
2

After ovulation, the corpus luteum secretes progesterone, which helps maintain pregnancy.

Which hormone is secreted by the heart and helps regulate blood pressure?

Erythropoietin
Atrial natriuretic factor (ANF)
Vasopressin
Aldosterone
2

Atrial natriuretic factor (ANF) is secreted by the heart and lowers blood pressure by promoting sodium excretion.

Which hormone is released from the stomach and stimulates hunger?

Ghrelin
Leptin
Secretin
Cholecystokinin (CCK)
1

Ghrelin is a hunger-stimulating hormone secreted by the stomach.

Which part of the adrenal gland secretes glucocorticoids?

Adrenal medulla
Zona glomerulosa
Zona fasciculata
Zona reticularis
3

Glucocorticoids such as cortisol are secreted by the zona fasciculata of the adrenal cortex.

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