Ch 27 and 28

Helpfulness: +1
Set Details Share
created 3 years ago by Ashlie_Quinn_Buchman
13,432 views
book cover
Human Anatomy & Physiology
Chapters 27, 28
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

Why are the male testes located in the scrotum outside the body?

Immature sperm are temperature sensitive.

2

Sperm are stored in the __________.

Epididymis

3

Genetic variation of individual chromosomes occurs during __________.

Prophase 1

4

What is the function of the blood-testis barrier?

to prevent activation of the immune system of the male against the developing sperm

5

Which of the following is FALSE regarding the vagina of an adult female?
A) The vagina is also called the birth canal.
B) The vaginal mucosa lacks glands.|
C) The mucosa of the vagina is stratified squamous epithelium.
D) The pH of the adult vagina is alkaline.

The pH of the adult vagina is alkaline.

6

A surge in __________ directly triggers ovulation.

luteinizing hormone (LH)

7

Why does only one egg, rather than four eggs, develop during oogenesis, given that spermatogenesis results in four sperm formed from one stem cell?

The unequal cytoplasmic division that results in one egg and three polar bodies ensures that a fertilized egg has ample nutrients for its journey to the uterus

8

What is the role of the corpus luteum?

to produce hormones that maintain the uterine lining during the first months of pregnancy

9

During the secretory phase of the uterine cycle __________.

the endometrium prepares for implantation

10

Which of the following conditions might contribute to an increased probability of having an ectopic pregnancy?
A) reduced blood flow to the ovaries
B) decreased number of cilia in the uterine tubes
C) reduced number of granulosa cells
D) decreased rate of formation of vesicular follicles

decreased number of cilia in the uterine tubes

11

The primary function of the uterus is to ________.

receive, retain, and nourish a fertilized ovum

12

True or False

The soft mucosal lining of the uterus is the endometrium.

True

13

The sperm's acrosome ____________________.

contains enzymes, which allow the sperm to penetrate the egg.

14

These cells located in between seminiferous tubules produce testosterone _______________

Interstitial

15

Fertilization generally occurs in the ________.

Fallopian tubes

16

During the secretory phase of the menstrual cycle ________.

progesterone levels are at their highest

17

Functions of testosterone include _______

facilitation of muscle and skeletal growth in mass

18

Normally menstruation occurs when ________.

blood levels of estrogen and progesterone decrease

19

The uterine layer which is shed with each monthly cycle is _________

the functional layer of endometrium.

20

Effects of estrogen include _______

growth of the breasts at puberty

21

Which is not a part of the proliferative phase of the female menstrual cycle?
A) late in this phase, cervical mucus becomes thin and crystalline
B) vesicular follicle growth
C) corpus luteum
D) development of endometrial cells

C. Corpus Luteum

22

True or False

A human egg or sperm contains 23 pairs of chromosomes.

True

23

True or False

Ovarian follicles contain mature eggs.

False

24

Which of the following glands are responsible for 60% of the synthesis of semen?
A) the seminal vesicles
B) the bulbourethral glands
C) the prostate
D) the pituitary

the seminal vesicles

25

Which of the following constitutes the female counterpart of the male scrotum?
A) the clitoris
B) the greater vestibular glands
C) the labia majora
D) the mons pubis

the labia majora

26

Sperm freshly deposited in the female vagina are incapable of fertilizing an egg. What must happen first?

Capacitation

27

Which of the following is the primary germ layer that forms the basis for the digestive, respiratory, and urogenital systems, and for associated glands?
A) endoderm
B) gastroderm
C) ectoderm
D) mesoderm

endoderm

28

What structure(s) ultimately form(s) the placenta?

decidua basalis and chorionic villi

29

A dangerous complication of pregnancy called __________ results in an insufficient placental blood supply, which can starve a fetus of oxygen. The pregnant woman becomes edematous and hypertensive, and proteinuria occurs.

Preeclampsia

30

Which of the following structures is derived from the ectoderm?
A) gonads
B) heart
C) kidney
D) brain and spinal cord

D) brain and spinal cord

31

Which body system of a pregnant woman shows the most dramatic physiological changes during pregnancy?

Cardiovascular System

32

A pregnant woman with preeclampsia becomes edematous and hypertensive. An effective way to treat these symptoms might be _____.

to use drugs that cause systemic vasodilatation

33

Developmental events during weeks 9-12 include ________.

sex readily detected from the genitals

34

During which stage of labor is the fetus delivered?

Expulsion stage

35

True or False

The period from fertilization through week eight is called the embryonic period.

True

36

Sperm move to the uterine tube through uterine contractions and the energy of their own flagella. What other factor is involved in sperm movement?

reverse peristalsis of the uterus and uterine tubes

37

The umbilical arteries carry ________.

waste products to the placenta

38

An implantation that takes place in a site other than the uterus is called ____________________.

ectopic

39

True or False

The two hormones responsible for initiating labor are thyroxine and human chorionic thyrotropin.

False

40

Failure of the foramen ovale to close at birth may result in ________.

mixing of oxygenated and non-oxygenated blood

41

True or False

hCG remains the dominant hormone throughout pregnancy.

False

42

Relaxin is a hormone produced by the placenta and ovaries. The function of this hormone is to ________.

Relax the pubic symphysis

43

It is impossible for sperm to be functional (able to fertilize the egg) until after ________.

They undergo capacitation

44

The hormone that induces labor and controls labor via a positive feedback mechanism is ____________________.

Oxytocin

45

When does the true moment of fertilization occur?

it occurs as the maternal and paternal chromosomes combine and produce the diploid ZYGOTE, or fertilized egg.