The hormone that stimulates the contraction of the uterus during childbirth is: MCQ with Answer and Explanation

The hormone that stimulates the contraction of the uterus during childbirth is:
A. Estrogen
B. Prolactin
C. Progesterone
D. Oxytocin
Answer: Option D
Solution (By JKSSB Mock Tests)
Oxytocin, released from the posterior pituitary, stimulates uterine smooth muscle contractions during parturition (childbirth) and milk ejection during lactation. Prolactin stimulates milk production. Estrogen and progesterone regulate reproductive cycle and maintain pregnancy. Oxytocin is also known as the 'love hormone' and functions through positive feedback during labor.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
The hormone that stimulates the gall bladder to release bile is:
A. Cholecystokinin (CCK)
B. Secretin
C. Motilin
D. Gastrin

Correct Answer: Option A


Explanation:
CCK, released from the duodenum in response to fats, stimulates contraction of the gall bladder and release of bile, and also stimulates pancreatic enzyme secretion. Gastrin stimulates HCl, secretin bicarbonate, motilin GI motility.

This question belongs to: Science Biology
Question #2
The pigment that is responsible for the red color of tomatoes and watermelon is:
A. Chlorophyll
B. Beta-carotene
C. Lycopene
D. Anthocyanin

Correct Answer: Option C


Explanation:
Lycopene is a red carotenoid pigment that accumulates in ripe tomatoes and watermelon. Beta-carotene is orange, chlorophyll green, anthocyanin purple/red in some plants.

This question belongs to: Science Biology
Question #3
Which part of the human brain is primarily responsible for maintaining balance and posture?
A. Cerebellum
B. Cerebrum
C. Hypothalamus
D. Medulla oblongata

Correct Answer: Option A


Explanation:
The cerebellum is a highly folded structure located at the back of the brain, below the cerebrum. It is primarily responsible for coordinating voluntary movements, maintaining balance, posture, and equilibrium. Damage to the cerebellum results in ataxia (lack of muscle coordination). The medulla controls vital involuntary functions like breathing and heart rate.

This question belongs to: Science Biology