Q. No.The epidermis and the dermis of the skin develops respectively from embryonic:
1. ectoderm, endoderm
2. ectoderm, mesoderm
3. endoderm, mesoderm
4. endoderm, ectoderm
1. ectoderm, endoderm
2. ectoderm, mesoderm
3. endoderm, mesoderm
4. endoderm, ectoderm
Identify the organ system in humans that is derived from all the three embryonic germ layers:
1. cardiovascular system.
2. digestive system.
3. endocrine system.
4. muscular system.
Parturition involves a positive feedback between:
1. uterine contraction, estrogen
2. estrogen, progesterone
3. estrogen, oxytocin
4. uterine contraction, oxytocin
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Lactation after child birth is possible due to decrease in the secretion of:
1. HCG
2. oxytocin
3. FSH and LH
4. estrogen and progesterone
The initial phase of the cortical reaction leads to:
1. slow block to polyspermy
2. fast block to polyspermy
3. formation of pronuclei
4. completion of acrosome reaction
Prolactin is secreted by:
1. hypothalamus
2. anterior pituitary
3. posterior pituitary
4. mammary glands
The first form of milk produced by the mammary glands of mammals immediately following delivery of the newborn is called:
| 1. | prolactin | 2. | progesterone |
| 3. | milk | 4. | colostrum |
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The most common age for the onset of puberty in females is:
1. 8-9 years
2. 9-10 years
3. 11-13 years
4. 14-15 years
Identify the incorrect statement:
1. Spermatogenesis begins at puberty.
2. Secondary spermatocyte has 23 chromosomes.
3. Oogenesis lasts only from puberty until menopause
4. oogenesis begins in fetal life
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Identify the incorrect statement:
1. Granulosa cells produce estrogen
2. LH surge is due to peak secretion of progesterone
3. The corpus luteum secretes both progesterone and estrogen along with inhibin
4. FSH acts directly on granulosa cells
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