Exam 1: Placentation, Gestation, Parturition

Question 1

The ________ is the outermost layer of the placenta

Answer 1

chorion

Question 2

The cavity immediately surrounding the fetus

Answer 2

Amnion

Question 3

The cavity originating as an outpouching of the hindgut

and is continuous with the urachus

Answer 3

Allantois

Question 4

Horses, Pigs, and Camelids

have this shape of placenta

Answer 4

Diffuse

Question 5

Cows, Sheep, and Goats

have this shape of placenta

Answer 5

Cotyledonary

Question 6

Dogs and Cats

have this shape of placenta

Answer 6

Zonary

Question 7

Humans and Mice

have this shape of placenta

Answer 7

Discoid

Question 8

Seen in horses and pigs,

intact membranes on both sides

are known as ___________ placenta

Answer 8

Epitheliochorial

Question 9

Seen in sheep and cows,

the placenta has a fetal-maternal synctium

and is known as a ___________ placenta

Answer 9

Syndesmochorial

Question 10

Seen in dogs and cats,

their placentas have this degree of invasiveness

Answer 10

Epitheliochorial

Question 11

Humans, mice, and guinea pigs

have placentas with this degree of invasiveness

Answer 11

Hemochorial

Question 12

In regards to intimacy of attachment,

Horses, Pigs, and Cows

have this type of placenta

Answer 12

Adeciduate

Question 13

In regards to intimacy of attachment,

Dogs, Cats, and Humans

have this type of placenta

Answer 13

Deciduate

Question 14

The fetal placental vasculature is

Villous in humans, pigs, horses, and cows

but

_________ in the dog and cat

Answer 14

Labyrinthine

Question 15

Cervical stars, ossified yolk sacs, and embryonic capsules

are seen in this species

Answer 15

horses

Question 16

Amniotic plaques and allantoic calculi (bovimane) are seen in

this species

Answer 16

Cows

Question 17

In the placenta of the pig,

avillous uterine gland secretory spots

exist and are known as

Answer 17

Areolae

Question 18

In dogs, when the placenta starts to hatch,

some of the fluid, called _________,

is excreted.

If you see this before birth, it means the placenta is detached.

If you seen this 24h post birth, it means there is another placenta detaching.

Answer 18

uteroverdin

Question 19

Cardiac output and blood volume ______ in response

to maternal recognition of pregnancy

Answer 19

increases

Question 20

This physiologic change in pregnancy is a laminitis risk

for horses

Answer 20

increased insulin resistance

Question 21

What are the triggers for parturition?

Answer 21

Fetal HPAdrenal Axis

Fetal hypoxemia in late gestation

Rapidly growing fetus, placental adequacy

Fetal maturation

CRH–>ACTH–>Cortisol