Unit 5
In the process of spermatogenesis, meiosis II produces cells called spermatids, and they contain ____ chromosomes.
23
The primary action of combined oral contraceptives is to ____
All of the above are correct.
____ cells of the testes produce testosterone in men.
Leydig
The ____ phase of the uterine cycle is when the endometrium detaches from the wall of the uterus causing bleeding..
Menstruation
Labor cannot take place until all of this hormone's effects are diminished.
Progesterone
This is secreted by the corpus luteum after ovulation.
Progesterone
This is the part of the blastocyst that promotes implantation and produces hCG.
Trophoblast
The ____ of the uterus is the inner mucosal lining covered with columnar epithelium and tubular glands.
endometrium
An ____ is do to the increase in pressure as arterial blood enters the vascular space of the erectile tissue. This compresses the veins reducing blood flow away from the penis.
erection
Most of the birth control pills for women are made up of which hormones?
estrogen and progesterone
Fertilization usually occurs in the uterus.
false
Fructose, which is an energy source for sperm, is a component of the secretions of the prostate gland.
false
Inhibin is secreted by Leydig cells inhibiting the anterior pituitary by negative feedback.
false
The first product of the breast following birth is colostrum and it does not contain antibodies.
false
The head of the sperm ____ .
has the acrosome which penetrates the egg
The hormone commonly measured in a pregnancy test is ____
hcg
The hormone oxytocin is released in a positive feedback cycle from the pituitary gland. The more contractions that are generated from the uterus, the more oxytocin is released from the pituitary gland. Which uterine layer is most responsive to oxytocin?
myometrium
The corpus luteum:
none
____ is the tough outer layer of the uterus.
perimetrium
The placenta is responsible for the production the steroid hormone ____ .
progesterone
Amniotic fluid functions to
protect the embryo against being jarred by movements of the mother's body.
In hot weather, the testes are protected from the heat by ____
relaxation of the dartos muscle.
The last fluid to be expelled from the urethra during ejaculation comes from the ____
seminal vesicles.
Capacitation refers to the
series of functional changes which prepare the plasma membrane of the sperm for fusion with the oocyte.
In the process of spermatogenesis, meiosis II produces cells called ____, and they contain 23 chromosomes.
spermatids
Placental lactogen stimulates breast development and prepares mammary glands for milk secretion
true
Sertoli cells support, nourish, and help regulate the developing spermatogonia.
true
The Bartholin's glands provide vaginal lubrication during coitus.
true
The developing offspring is called an embryo for the first eight weeks of development.
true
The ovarian ligament anchors the ovaries to the uterus.
true