Which of the following hormones is released by the anterior pituitary as a part of that positive feedback loop between it and the ovary?
A) progesterone
B) luteinizing hormone
C) gonadotropin releasing hormone
D) estrogen
E) gonadotropin
Answer: luteinizing hormone (Option B)
Explanation: Luteinizing hormone (LH) is a gonadotropic hormone secreted by gonadotropic cells in the anterior pituitary gland. Luteinizing hormone (LH) performs series of functions when secreted. For example, LH triggers corpus leteum development (which produce progesterone for pregnancy sustainance) and ovulation in females when at acute rate.
However, low rate of luteinizing hormone (LH) establish signs of primary ovarian failure (a feedback mechanism) which translates that the ovaries have problem.
One of the major elements of natural selection is that all species have genetic variation. Natural selection is a process when organisms adapt better to their environment. It is an essential key in evolution. There is a change in phenotype of a population over time.
By far the largest region of your brain is the forebrain (derived from the developmental prosencephalon), which contains the entire cerebrum and several structures directly nestled within it - the thalamus, hypothalamus, the pineal gland and the limbic system.
