Quiz 1 practice questions

Question 1

Sperm within an ejaculate that does not contains vesiculate would:

Answer 1

at a disadvantage because they might not have had a solid clot from which to start migration

Question 2

Which of the following cells is Diploid AND 4N?

a. spermatozoon
b. spermatogonium
c. secondary oocyte
d. primary oocyte

Answer 2

d. primary oocyte

Question 3

The epiblast and the _______ make the bilaminar embryonic disk?

Answer 3

hypoblast cells

Question 4

The acrosome reaction involves several events. Which of the following events is false?

a. across allows for fusion of the acrosome membrane with the sperm membrane
b. hyaluronidase release facilitates penetration through the corona radiata
c. surface glycoproteins are digested from the sperm membrane resulting in capacitation of the sperm
d. zona pellucida spontaneously degenerates and disappears

Answer 4

d. zona pellucida spontaneously degenerates and disappears

Question 5

The blastocyst:

a. includes a central trophoblast mass of cells that will contribute to placenta formation
b. contains an embryoblast that secretes hCG to maintain the pregnancy
c. contains a single fluid filled cavity known as the umbilical vesicle
d. is nourished by syncytiotrophoblast activity

Answer 5

d. is nourished by syncytiotrophoblast activity

Question 6

An embryo fails to undergo compaction. The outcome of this failure would be?

Answer 6

the blastocoele would not form

Question 7

The only monosomy that is compatible with life is monosomy of which chromosome?

Answer 7

the X chromosome

Question 8

Meiosis progresses normally during oogenesis. What is the cell that is within the tertiary follicle?

Answer 8

secondary oocyte

Question 9

A mosaic:

a. occurs when two sperm fertilize the same oocyte
b. creates an embryo with the same genotype as the placenta
c. can lessen the effects of severe mutation
d. can create excess limbs

Answer 9

c. can lessen the effects of severe mutation

Question 10

A man and his wife are having trouble conceiving. She is undergoing fertility testing with her physician and he is seeing his physician to do the same. He goes in for a standard lab test and the lab comes back with the following results:
Volume of ejaculate: 3 mL
Concentration: 19 million sperm/mL
% abnormal morphology: 32%
Motility after 2 hrs: 53% of total
Motility after 24 hrs: 21% of total
What would be your diagnosis if you were the man’s clinician?

Answer 10

your sperm count and morphology are both an issue. You may be sterile

Question 11

Human chorionic gonadotropin:

a. is produced by the corpus luteum
b. is produced by the syncytiotrophoblast
c. is the earliest testable marker for pregnancy
d. is the enzyme that causes implantation

Answer 11

b. is produced by the syncytiotrophoblast

Question 12

Chorionic villus sampling:

a. uses cells that are shed from the embryo to determine genotype
b. involves the harvest of chorionic villi via intraperitoneal needle biopsy
c. has a higher risk of miscarriage than amniocentesis
d. is usually taken around 18 weeks

Answer 12

c. has a higher risk of miscarriage than amniocentesis

Question 13

In the placenta, the blood in the spiral arteries is from the _____ (mother or fetus) and the nutrients in them are transferred to the _______.

Answer 13

mother, branch chorionic villi vein

Question 14

Grace goes into her doctor because she is in her late second trimester and is worried because she has been noting bleeding. She was lax in getting her 20 week ultrasound. The practitioner orders an ultrasound of the _____________ immediately because she could be experiencing _________________.

Answer 14

placenta, placenta previa

Question 15

What layer secrete/creates the extra embryonic mesoderm?

Answer 15

the exoceolomic membrane

Question 16

What is the major difference between the structure of a primary chorionic villus and a secondary chorionic villus?

Answer 16

a mesenchymal layer

FYI: the difference between a secondary and tertiary is the present of capillaries