Developmental

Question 1

The development of hand or feet, the individual digits separate after being used. Which illustrates?

Answer 1

Apoptosis, can help sculpt hands, the cells b/t these structures die and separation occurs. ex) frog loses its tail

Question 2

An area located close to the equator of an egg cell on the side opposite the point of sperm entry is called:

Answer 2

Gray Crescent, establishes the body axis

Question 3

When some ectodermal cells elongate

Answer 3

the neural plate is formed. (ecto = external) forms neurons, skin and pigments

Question 4

Morula?

Answer 4

Solid ball of cells divide mitotically to form blastula. It becomes gastrula

Question 5

Ectoderm examples

Answer 5

Hair, TEETH, skin nervous system and lens of the eye

Question 6

Endoderm examples

Answer 6

Lining of bladder, GI tracts, liver and pancreas

Question 7

Mesoderm examples

Answer 7

Skeleton, muscles, gonads, kidney and circulatory system

Question 8

Estradiol and Progesterone are secreted by..

Answer 8

Corpus Luteum. (Yellow body) When it isn’t used after menstruation. Est: makes it bloody(build up walls) and Prog: Maintains the walls i.e Glue. LH stimulates

Question 9

What does Corpus Luteum breaks down into?

Answer 9

Corpus Albicans if no fertilization occurs.

Question 10

Oocyte development is halted at ___ of meiosis until a female reaches puberty.

Answer 10

Prophase I

Question 11

Process in an embryo in which one tissue causes another to differentiate is called:

Answer 11

Induction