Embryology

Question 1

What is the major distinguishing factor that separates the embryonic stage from the fetal stage?

Answer 1

All major organ systems form during the embryonic stage; the fetal stage consists mainly of rapid growth.

Question 2

Testosterone is to the male as which hormone is to the female?

Answer 2

oestrogen

Question 3

In fetal blood vessels the oxygen content is highest in the:

Answer 3

Ductus venosus.

Question 4

As part of fetal circulation once in the right atrium most of the blood passes through the __________ into the left atrium.

Answer 4

Foramen ovale.

Question 5

As part of fetal circulation half of the blood travels through the liver the other half bypasses it via the:

Answer 5

ductus venosus.

Question 6

The _______ is a subcutaneous pad of adipose tissue covering the symphysis pubis.

Answer 6

mons pubis.

Question 7

The inner membrane that encloses the fluid medium for the embryo is the..

Answer 7

Amnion.

Question 8

As part of fetal circulation the shunt that allows blood to flow directly from the pulmonary artery to the aorta is the_____.

Answer 8

ductus arteriosus.

Question 9

Within which extraembryonic membrane are blood cells formed in the early stages of development?

Answer 9

Yolk sac.

Question 10

What portion of the uterus is shed during menstruation?

Answer 10

Stratum functionale of the endometrium.

Question 11

Which vessel transports blood rich in oxygen and nutrients to the fetus?

Answer 11

Umbilical vein.

Question 12

Testosterone is produced by:

Answer 12

Interstitial cells.

Question 13

Innate natural immunity is best defined as:

Answer 13

A passive inheritance against specific organisms.

Question 14

The structure which implants in the endometrium is correctly termed a(n) _____.

Answer 14

blastocyst.

Question 15

A function of FSH in the male is to:

Answer 15

Initiate spermatogenesis.

Question 16

Which of these substances is/are not teratogenic?

Answer 16

most water-soluble vitamins.

Question 17

Which of the following is not produced by the human anterior pituitary gland?
1. follicle-stimulating hormone.
2.oxytocin
3.prolactin.
4. luteinizing hormone.

Answer 17

2.oxytocin

Question 18

Immunity transferred to the fetus from an immune mother through the placenta is:

Answer 18

Passive natural immunity.

Question 19

Ovulation is triggered by a surge of_______________.

Answer 19

luteinizing hormone.

Question 20

Which membrane plays the greatest role in nutrient and wastes exchanges?

Answer 20

chorion.

Question 21

When is a developing individual most susceptible to genetic birth defects from smoking?

Answer 21

first trimester.

Question 22

While discussing reproductive health with a group of female adolescents, one of the adolescents asks the nurse, “Where is the ovum fertilised?” The nurse responds by stating that fertilisation normally occurs at which of the following sites?

Answer 22

Fallopian tube.

Question 23

The primary purpose of amniotic fluid is to:

Answer 23

Protect the fetus during development.

Question 24

Implantation generally occurs at which place on the uterus?

Answer 24

The upper posterior surface

Question 25

During the _________________ phase of menstruation, the lining of the uterus rebuilds.

Answer 25

proliferative.

Question 26

When is it first possible to distinguish the sex of a fetus?

Answer 26

third month.

Question 27

Which hormone prevents a second pregnancy during gestation?

Answer 27

Progesterone.

Question 28

In which menstrual cycle phase does implantation occur?

Answer 28

secretory.

Question 29

Fraternal (dizygotic) twins result when

Answer 29

Two sperm fertilize two ova.

Question 30

How do I work out the due date

Answer 30

1st day of last period
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