1.
Where does GnRH go once it's released from the hypothalamus?
Correct Answer
B. Anterior pituitary gland
Explanation
Goes to the anterior pituitary, which releases FSH and LH then, the ovaries release estrogen and progesterone.
2.
Hormone levels that fluctuate during the female mentrual cycle are present and consistent in males.
Correct Answer
A. True
Explanation
Hormone levels that fluctuate during the female menstrual cycle, such as estrogen and progesterone, are also present in males. While males do not experience a menstrual cycle, they still have these hormones in their bodies, although at different levels. These hormones play important roles in various physiological processes in males, such as regulating sexual development, maintaining bone density, and influencing mood and behavior. Therefore, the statement is true.
3.
Which phase of the menstrual cycle is the formation of favorable conditions for supporting pregnancy?
Correct Answer
C. Secretory
Explanation
During the secretory phase of the menstrual cycle, the endometrium thickens and becomes rich in blood vessels, preparing for the implantation of a fertilized egg. This phase occurs after ovulation, when the egg is released from the ovary and travels to the uterus. The secretory phase creates favorable conditions for supporting pregnancy by providing a nourishing environment for the fertilized egg to implant and develop.
4.
What are the major hormonal changes in the proliferative Follicular phase?
Correct Answer(s)
A. Increase in FSH and LH
B. Decrease in FSH and LH
E. Increased levels of estrogen
Explanation
During the proliferative follicular phase, there is an increase in FSH and LH. FSH stimulates the growth and development of ovarian follicles, while LH triggers the release of a mature egg from the follicle (ovulation). Additionally, there are increased levels of estrogen during this phase, which helps to thicken the uterine lining in preparation for potential implantation. Therefore, the correct answer includes the increase in FSH and LH as well as the increased levels of estrogen.
5.
What are the major hormonal changes in the LH surge and ovulation?
Correct Answer
F. Estrogen levels peak
Explanation
During the LH surge and ovulation, estrogen levels peak. This is because the LH surge stimulates the ovarian follicles to produce and release estrogen. Estrogen plays a crucial role in preparing the uterus for implantation of a fertilized egg by thickening the uterine lining. It also triggers the release of luteinizing hormone (LH), which is responsible for the release of the mature egg from the ovary. Therefore, the peak in estrogen levels is a major hormonal change that occurs during the LH surge and ovulation.
6.
What are the major hormonal changes in the luteal phase?
Correct Answer
G. Under low levels of LH, corpus luteum releases estrogens and progesterone
Explanation
During the luteal phase, there is a decrease in FSH and LH levels. The corpus luteum, which is formed after ovulation, releases estrogen and progesterone. This release of hormones helps prepare the uterus for potential pregnancy by thickening the uterine lining and inhibiting further follicle development. As the luteal phase progresses, estrogen and progesterone levels gradually decline, which can lead to the shedding of the uterine lining if fertilization does not occur.
7.
What are the major hormonal changes in the menses phase?
Correct Answer
D. Declining levels of estrogen and progesterone
Explanation
During the menses phase, the uterine lining sheds, resulting in menstruation. This is caused by declining levels of estrogen and progesterone. Estrogen and progesterone are responsible for maintaining the uterine lining, but as their levels decrease, the lining is no longer supported and is shed. This hormonal change triggers the start of menstruation.
8.
Estrogen activates ________ to deposit calcium salt in bone and inibits __________ causing a decrease in bone resorption.
Correct Answer
A. Osteoblasts, osteoclasts
Explanation
Estrogen activates osteoblasts to deposit calcium salt in bone and inhibits osteoclasts causing a decrease in bone resorption. Osteoblasts are responsible for building and depositing new bone tissue, while osteoclasts are responsible for breaking down and resorbing old bone tissue. Estrogen promotes bone formation by stimulating osteoblast activity and inhibiting osteoclast activity, leading to an increase in bone density.
9.
What is the correct order for peaks of LH, estrogen and progesterone during the menstrual cycle, beginning with day 1?
Correct Answer
A. Estrogen then LH then progesterone
Explanation
During the menstrual cycle, estrogen levels initially rise, leading to the thickening of the uterine lining. This increase in estrogen is followed by a surge in LH (luteinizing hormone), which triggers ovulation. After ovulation, progesterone levels rise, preparing the uterus for possible implantation of a fertilized egg. Therefore, the correct order for the peaks of LH, estrogen, and progesterone during the menstrual cycle, beginning with day 1, is estrogen then LH then progesterone.
10.
Estrogen and progesterone inhibit gonadotropin release and prevent ovulation.
Correct Answer
A. True
Explanation
GnRH, FSH and LH are also suppressed.