Question 1

During parturtition,mechanical pressure caused by the movement of the fetus through the uterus causes the release of ___ from the ___.

Accepted Answer

A)  HCG---hypothalamus 
B)  oxytocin---posterior pituitary 
C)  oxytocin---hypothalamus 
D)  HCG---posterior pituitary 
E)  oxytocin---adrenal cortex

Question 2

Which of the following cells are diploid?

Accepted Answer

A)  sperm 
B)  primary spermatocytes 
C)  secondary spermatocytes 
D)  male germ cells 
E)  both primary spermatocytes and male germ cells

Question 3

The ____ is one of a pair of ciliated channels through which oocytes are conducted.

Accepted Answer

A)  ovary 
B)  uterus 
C)  vagina 
D)  oviduct 
E)  follicle

Question 4

The type of contraception that functions by preventing implantation (even after successful fertilization)is

Accepted Answer

A)  tubal ligation. 
B)  spermicidal jelly. 
C)  birth control pills. 
D)  morning after pills. 
E)  diaphragm.

Question 5

____ stimulates the growth of cells that will produce milk proteins.

Accepted Answer

A)  Estrogen. 
B)  Prolactin. 
C)  Oxytocin. 
D)  Prostaglandin. 
E)  Progesterone.

Question 6

In this STD,symptoms include warts on the genitals and can lead to cervical and anal cancers.This STD is

Accepted Answer

A)  gonorrhea. 
B)  siphilis. 
C)  chlamydia. 
D)  genital herpes. 
E)  HPV infection.

Question 7

Drug-induced abortions most commonly are effective by

Accepted Answer

A)  inhibiting the activity of progesterone. 
B)  inhibiting the activity of estrogens. 
C)  stimulating a large release of testosterone. 
D)  stimulating a large release of LH and FSH. 
E)  inhibiting the activity of estrogens, LH, FSH, and progesterone.

Question 8

The effectiveness of all of the following methods of contraception is greater than 99% except for

Accepted Answer

A)  the birth control pill. 
B)  hormone implants. 
C)  condoms. 
D)  tubal ligation. 
E)  there are no exceptions- all of these methods are greater than 99% effective.

Question 9

Parthenogenesis refers to

Accepted Answer

A)  new genetically based traits that arise spontaneously. 
B)  traits that arise through epigenesis. 
C)  live birth by normally egg-laying species. 
D)  the formation of a new individual from an unfertilized egg. 
E)  the origin of a new individual from a male.

Question 10

Mesoderm gives rise to all of the following except

Accepted Answer

A)  the muscular system. 
B)  the circulatory system. 
C)  the reproductive system. 
D)  the nervous system. 
E)  the excretory system.

Question 11

In a sperm's journey out of the body what is the correct order of structures it encounters either directly or by way of the structure's secretions?
1)bulbourethral gland
2)vas deferens
3)seminal vesicle
4)epididymus
5)urethra

Accepted Answer

A)  4-2-1-3-5 
B)  4-1-2-3-5 
C)  4-2-3-1-5 
D)  2-4-3-1-5 
E)  2-4-1-3-5

Question 12

Typically,one one sperm fertilizes the oocyte because

Accepted Answer

A)  an acid solution is released that kills all other sperm. 
B)  special organelles within the oocyte eject more than one sperm. 
C)  changes occur to the protein coat that prevent further penetration. 
D)  follicle cellular space is only wide enough for one sperm. 
E)  usually only one sperm arrives at the oocyte.

Question 13

During which of the following stages do cell lineages of identical genetic makeup become structurally and functionally different from one another according to the genetically controlled developmental program of the species?

Accepted Answer

A)  cleavage 
B)  differentiation 
C)  blastula formation 
D)  metamorphosis 
E)  ovulation

Question 14

Classification.Answer the questions in reference to the five stages of development listed below.
a.zygote
b.blastula
c.blastocyst
d.gastrula
e.embryo
-The major germ layers are formed during this stage.

Accepted Answer

The answer of Classification.Answer the questions in reference to the...

Question 15

A fully functional corpus luteum secretes

Accepted Answer

A)  LH and FSH. 
B)  estrogens and progesterone. 
C)  GnRH and estrogens. 
D)  estrogens and FSH. 
E)  progesterone and LH.

Question 16

The average number of sperm that enter the vagina during an ejaculation is between

Accepted Answer

A)  150,000 and 350,000. 
B)  1.5 and 3.5 million. 
C)  15 and 35 million. 
D)  150 and 350 million. 
E)  1.5 and 3.5 billion.

Question 17

The reproductive organ in the human female that is responsible for egg production is the

Accepted Answer

A)  uterus. 
B)  ovary. 
C)  vagina. 
D)  clitoris. 
E)  oviduct.

Question 18

A penis becomes erect because of

Accepted Answer

A)  muscle contractions. 
B)  blood flow into spongy tissue. 
C)  hydrostatic pressure. 
D)  osmosis. 
E)  a combination of more than one of these.

Question 19

Select the correct sequence of animal developmental events.

Accepted Answer

A)  fertilization >>> cleavage >>> organ formation >>> growth of tissues 
B)  fertilization >>> cleavage >>> gastrula >>> organ formation 
C)  fertilization >>> gastrula >>> cleavage >>> organ formation 
D)  fertilization >>> organ formation >>> gastrula >>> cleavage 
E)  fertilization >>> organ formation >>> cleavage >>> gastrula

Question 20

In the United States,how many embryos,created by IVF,remain frozen?

Accepted Answer

A)  10,000 
B)  50,000 
C)  100,000 
D)  500,000 
E)  1,000,000

Exam 26: Reproduction and Development

During parturtition,mechanical pressure caused by the movement of the fetus through the uterus causes the release of _ from the _.