development, pregnancy and hereditary unit

Liver

Kidney

 

Stomach

 

Small intestine

Stomach

C

True

False

True

Pancreas

Stomach

 

Heart

 

Liver

Liver

Stomach

Placenta

 

Pubic symphysis

 

Umbilical cord

Placenta

D

Small intestine

Pancreas

 

Fundus of uterus

 

Rectum

Pancreas

A

D

B

Drinking alcohol during pregnancy is ________.

 

not significantly harmful, since alcohol does not cross the placenta

 

only harmful to the fetus if the mother drinks hard liquor

 

beneficial to the fetus, as it stimulates cardiovascular development

 

associated with microencephaly and intellectual disorders of the fetus

associated with microencephaly and intellectual disorders of the fetus

The placenta, a vitally important metabolic organ, is made up of a contribution from mother and fetus. Which portion is from the fetus?

 

yolk sac

 

umbilicus

 

amnion

 

chorion

chorion

Implantation usually begins at about the end of the first ________ of development.

 

trimester

 

week

 

month

 

day

week

The third through eighth weeks of development are known as the ________ period.

 

cleavage

 

fetal

 

embryonic

 

pre-embryonic

embryonic

Prior to the let-down reflex, the mammary glands secrete a yellowish fluid called ________ that has less lactose than milk and almost no fat.

 

bilirubin

 

prolactin

 

meconium

 

colostrum

colostrum

Cleavage involves a series of ________ divisions and ________ in the overall size of the conceptus.

 

mitotic; no change

 

meiotic; no change

 

meiotic; an increase

 

meiotic; a decrease

mitotic; no change

What is expelled during the expulsion stage of labor?

 

The fetus

 

Only amniotic fluid

 

Colostrum

 

The placenta and remaining fetal membranes

The fetus

During pregnancy, a woman's areolae and nipples become darker under the influence of

 

vasopressin from the posterior pituitary gland.

 

estrogen and progesterone from the ovary.

 

melanocyte-stimulating hormone from the placenta.

 

melanin from the pineal gland.

melanocyte-stimulating hormone from the placenta.

Which structure is an important site for early blood cell formation and is the first of the extraembryonic membranes to form?

 

Yolk sac

 

Chorion

 

Amnion

 

Zona pellucida

Yolk sac

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

 

prevent morning sickness

 

block the pain of childbirth

 

relax the pubic symphysis

 

ensure the implantation of the blastula

relax the pubic symphysis

At the 16-cell stage, the conceptus is known as a(n)

 

zygote.

 

morula.

 

blastocyst.

 

trophoblast.

morula.

The second trimester of a pregnancy includes months

 

4–6

 

5–9

 

5–7

 

2–5

4-6

The process by which a blastocyst embeds within the uterine endometrium is known as

 

cleavage.

 

implantation.

 

morulation.

 

capacitation.

implantation.

What thin membrane, continuous with the epiblast layer, secretes fluid to bathe the embryo?

 

Chorion

 

Amnion

 

Yolk sac

 

Corona radiata

Amnion

At which stage of labor is the "afterbirth" expelled?

 

expulsion

 

placental

 

full dilation

 

dystocia

placental