PORTAGE LEARNING BIOD 151 A& P 1
MODULE 6 Exam
Answer the following questions.
1. Explain two reasons why a woman with low levels of LH would not be
... [Show More] able to
becomepregnant.
(1) LH acts on the ovary to cause ovulation to occur. (2) LH causes progesterone
release to facilitate potential fertilization ofthe egg and pregnancy. Progesterone is a
key hormone forthe maintenance of pregnancy.
2. Would you expect a male to have estrogen in their bloodstream? Explain why or why
not.
(1)Yes. Both male and female bodies produce “all”the sex hormones. However, the
ratiosare different.
(2) The adrenal glands are largely responsible for producing this “opposite”
hormone thatthe testis would not.
1. Explain two reasons why a woman with low levels of LH would not be able to
becomepregnant.
LH, luteinizing hormone, stimulates the ovaries in females. Low levels of LH can
indicate a problem with the ovaries. This can result in problems with ovulation. Low
levels of LH can alsoindicate a problem with the pituitary gland, which is the master
gland that produces LH.
Label the endocrine glands (A-C)
A:
Pineal gland
B:
Hypothalamus
1. Explain the concept of positive feedback. Give an example of a hormone that works
throughpositive feedback.
1- Positive feedback is the action of a hormone increasing the production of that
hormone. (Thisis the opposite of negative feedback).
2- One example is the action of oxytocin causing the uterus to contract during labor.
Oxytocin enhances the effect of the uterus contractions, causing more oxytocin to be
released. The positivefeedback loop is stopped once the baby is born and the uterus no
longer needs to contract, stopping the production of oxytocin.
C:
Pituitary gland
Positive feedback system increases the amount of the hormone that is regulated. An
example of a hormone that works through positive feedback is oxytocin. This
hormone is involved with childbirth bycausing the uterus to contract. As the uterus is
contracting, this causes more oxytocin to be released. The feedback is stopped once the
baby is born and the uterus does not need to contract. This stops therelease of
oxytocin.
Answer the following five questions:
1. This type of hormone is derived from proteins: [Show Less]