Which hormone maintains the viability of the corpus luteum during early pregnancy?
a. estrogen
b. progesterone
c. human chorionic gonadotropin (hcg)
d. human placental lactogen (hpl.)
e. oxytocin

The correct option is: c. human chorionic gonadotropin (hCG)

Explanation:

Human chorionic gonadotropin is a glycoprotein, secreted by the syncytiotrophoblast cells of the placenta during early pregnancy. The human chorionic gonadotropin hormone is produced after the implantation to maintain the viability of the corpus luteum during the first trimester of the pregnancy. The presence of this hormone can be detected by some pregnancy tests.

The correct answer is c. human chorionic gonadotropin (hCG)

Explanation:

Human chorionic gonadotropin (hCG) is released after the ovum get fertilized.  It is a placental hormone which gives nourishment to ovum and supports the viability of corpus luteum so that it can release the progesterone hormone.

Progesterone hormone is necessary to maintain the endometrial lining in the uterus to maintain the pregnancy.  Detection of hCG in urine or blood give the confirmation test for pregnancy.

So the correct answer is c.human chorionic gonadotropin (hCG)

between the two muscle layers is the myenteric or auerbach's plexus, which controls peristalsis. in the colon, the muscularis externa is much thicker because the feces are large and heavy, requiring more force to push along. the stomach has a third layer of muscularis externa: the inner oblique layer.

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explanation: