The hormone that relaxes the pubic symphysis during childbirth is:
A. Oxytocin
B. Progesterone
C. Relaxin
D. Estrogen
Answer: Option C
Solution (By JKExamLibrary)
Relaxin, produced by the corpus luteum and placenta, softens and relaxes the pelvic ligaments and pubic symphysis to facilitate childbirth. Oxytocin stimulates contractions.
Explanation:
Photosynthesis converts CO₂ and H₂O into glucose and oxygen using light energy, catalyzed by chlorophyll in chloroplasts. This process sustains nearly all life, providing food and oxygen. Respiration releases energy from glucose, chemosynthesis uses chemical energy, transpiration is water loss.
Explanation:
The left ventricle pumps blood into the aorta and to the systemic circulation. Its wall is the thickest because it must generate high pressure.
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