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Human Reproduction — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction5 Marks
Question
Answer the following questions:
Name the hormones secreted and write their functions:
  1. By corpus luteum and placenta (any two) .
  2. During Follicular phase and parturition.
✓

Answer

S. No.
Hormones Secreted
Their functions
(i) By corpus luteum
1. Progesterone
2. Estradiol
Essential for maintaining endometrium for implantations of fertilised ovum. Also inhibits release of FSH.
By placenta
1. Human Placental lactogen
Ensures supply of energy to foetus. It has anti-insulin property.
 
2. hCG (Human chorionic gonadotropin)
Maintains corpus luteum in pregnancy and stimulates release of progesterone.
(ii) During Follicular Phase
1. LH
2. FSH
Stimulates follicular development as well as secretion of estrogen by growing follicles.
During parturition
Oxytocin
Leads to contraction of smooth muscles of myometrium of the uterus during child birth.

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