Chapter C11. La riproduzione e lo sviluppo #108756

Human reproductive systems

In human males, sterility results when the testes are located inside the abdominal cavity instead of in the scrotum because

A:

the sperm cannot pass through the vas deferens.

B:

sperm production is inhibited at body temperature.

C:

the sperm cannot travel the extra distance.

D:

digestive juices destroy the sperm.

Scelta multipla

Human reproductive systems

The release of the oocyte from the follicle is caused by

A:

a decreasing level of estrogen.

B:

a surge in the level of follicle-stimulating hormone.

C:

a surge in the level of luteinizing hormone.

D:

progesterone released from the corpus luteum.

Scelta multipla

How animals reproduce

The evolutionary significance of the placenta is that it allowed

A:

animals to retain their eggs until they hatched.

B:

offspring to be born in an immature state and then develop outside the mother.

C:

offspring to exchange materials with the mother while developing inside the mother.

D:

mammals to develop the ability to produce milk.

Scelta multipla

Early developmental stages and processes

Which process refers to the shaping of the embryo and involves cell migration?

A:

cleavage

B:

differentiation

C:

growth

D:

morphogenesis

Scelta multipla

Early developmental stages and processes

Which of these stages is mismatched?

A:

cleavage—cell division

B:

blastula—gut formation

C:

gastrula—three germ layers

D:

neurula—nervous system

Scelta multipla

Human reproductive system

Which of the following is not an event of the ovarian cycle?

A:

FSH promotes the development of a follicle.

B:

The endometrium thickens.

C:

The corpus luteum secretes progesterone.

D:

Ovulation of an egg occurs.

Scelta multipla

Early developmental stages and processes

Gastrulation is influenced by the

A:

nervous system.

B:

amount of yolk.

C:

environment.

D:

presence of hormones.

Scelta multipla

Early developmental stages and processes

Which of the germ layers is best associated with development of the heart?

A:

ectoderm

B:

mesoderm

C:

endoderm

D:

neurula

E:

All of these are correct.

Scelta multipla

Early developmental stages and processes

In humans, the fetus

A:

has four extraembryonic membranes.

B:

has developed organs and is recognizably human.

C:

is dependent upon the placenta for excretion of wastes and acquisition of nutrients.

D:

All of these are correct.

Scelta multipla

Early developmental stages and processes

In human development, which part of the blastocyst develops into a fetus?

A:

morula

B:

trophoblast

C:

inner cell mass

D:

chorion

E:

yolk sac

Scelta multipla