58. What hormone is secreted by the chorion that is used in a pregnancy test to

Question

58. What hormone is secreted by the chorion that is used in a pregnancy test to determine if a woman is pregnant? a. LH b. hCG c. estrogen d. oxytocin 59. Blood within the umbilical contains of fetal waste products. a. Arteries b. Veins 60. In humans parturition can be blocked by a. Inhibiting the actions of progesterone b. Stimulating the actions of estrogen c. Inhibiting the actions of oxytocin d. Stimulating the actions of hCG 61. What hormone is secreted by the anterior pituitary that stimulates production of milk proteins? a. Oxytocin b. Growth hormone c. Aldosterone d. Prolactin

Explanation / Answer

Question 58

Answer is B

This the placental hormone which produced by by cells that is syncitiotrophoblasts. Normally its level is less than 5 IU/L. These are not that much significant in urine and blood during non pregnant condition. But during pregnancy, hCG levels are more they can appear in urine and blood. it supports the endometrial lining and pregnancy. During the maximum value is 200000IU/L. after that its value is gradually decreases.

Functions

i. Corpus luteal progesterone production

ii. Development of uterine vasculature that angiogenesis

iii. Growth and differentiation of fetal organs at deferent levels

Iv. Growth and development of Umbilical cord

Question 59

Answer is A

Fetal circualtion is different from normal circualtion. The umbelical cord have both arteries and veins. The umbelical cord veins carries the oxygenated blood and all the nutrients required for the fetus. Where as the Umbelical arteries carries deoxygenated and waste products to the mother.

Question 60

Answer is C

The parturition can be initiation by contraction of uterine muscles. These uterine muscles are contracted by release of oxytocin. By inhibition of this hormone leads to block the parturition. which is released from posterior pituitary galnd.

Question 61.

Answer is D

it is secreted by the posterir pituitary gland. it is also called as luteotropic hormone. It actvates the mammals to produce milk during ovalution, lactation(breastfeeding) and in respose to eating.

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