Ch 47 Pt 2

Question 1

What is the function of the cortical reaction

Answer 1

Prevent polyspermy

Question 2

Gastrulation

Answer 2

Development of germ layers

Question 3

Diploblast

Answer 3

Blastopore capable of becoming open end of gastrovascular cavity

Question 4

Protostome

Answer 4

Mouth forms from blastopore

Question 5

Deuterostome

Answer 5

Mouth forms from opposite end of blastopore

Question 6

Ectoderm

Answer 6

Nervous and sensory systems, jaws and teeth

Epidermis

Pituitary, adrenal

Question 7

Mesoderm

Answer 7

Skeletal and muscular

Circulatory and lymph

Adrenal cortex

Question 8

Endoderm

Answer 8

Epithelial lining

Thymus, thyroid, parathyroid

Question 9

Epiblast

Answer 9

Ectoderm and mesoderm

Question 10

Hypoblast

Answer 10

Endoderm

Question 11

Amniotes

Answer 11

Mammals, birds, reptiles

Question 12

Neurulation

Answer 12

Formation of brain and spinal cord

Notochord -> neural plate

Question 13

Somites

Answer 13

Mesenchyme cells -> vertebrae, ribs, muscles

Question 14

Morphogenesis

Answer 14

Organization of organisms external and internal organs

Question 15

Determination

Answer 15

Process by which a cell or group of cells becomes committed

Question 16

Differentiation

Answer 16

Resulting specialized structure and function

Question 17

Convergent Extension

Answer 17

Sheet of cells rearrange to form longer, narrower shape

Question 18

Cell Migration

Answer 18

Cell adhesion molecules and extracellular matrix

Question 19

Apoptosis

Answer 19

Various times throughout development (webbed feet)

Question 20

Pattern formation of axis and limb development

Answer 20

Inductive signals

Question 21

Positional information

Answer 21

Location in respect to body axis