CH 25 study guide

Question 1

What are the characteristics of all animals? (there are five)

Answer 1

members of the kingdom Animalia, multicellular, heterotrophic. eukaryotic organisms whose cells lack cell walls

Question 2

Four characteristics of chordates?

Answer 2

a dorsal, hollow nerve chord, a notochord (a tail that extends beyond the anus.) and pharyngeal pouches

Question 3

What is feedback inhibition? Give an example.

Answer 3

A system in which the product or result of a process limits the process itself.; If you get too cold, you shiver, using muscle activity to generate heat. if you get too hot, you sweat, which helps you lose heat.

Question 4

What are the features of animal body plans?

Answer 4

levels of organization, body symmetry, differentiation of germ layers, formation of body cavities, patterns of embryological development, segmentation, cephalization, and limb formation

Question 5

What are the two types of symmetry? Which is the most successful?

Answer 5

radial symmetry, and bilateral symmetry; bilateral symmetry

Question 6

Name the three germ layers

Answer 6

endoderm, mesoderm, ectoderm

Question 7

what does the endoderm germ layer do?

Answer 7

Is the innermost germ layer, develops into the linings of the digestive tract and much of the respiratory system.

Question 8

what does the mesoderm germ layer do?

Answer 8

Is the middle layer, gives rise to muscles and much of the circulatory, reproductive, and excratory organ systems.

Question 9

what does the ectoderm layer do?

Answer 9

The outermost layer, produces sense organs, nerves, and the outer layer of the skin

Question 10

Difference between protostomes and deuterostomes. Which are we?

Answer 10

In protosomes, the blastopore becomes the mouth, he anus develops at the end of the tube.and in deuterostomes, blastopore becomes the anus. The mouth is formed from the second opening that develops.<br></br><br></br>we are deuterostomes.

Question 11

What is the difference between a coelom and pseudocoelom?

Answer 11

A coelom is a bodyhh cavity that develops within the mesoderm and is completely lined with tissue derived from mesoderm.<br></br><br></br>A pseudocoelom is only partially lined with mesoderm.

Question 12

What is the first stage of development following conception?

Answer 12

A zygote, or fertilized egg.

Question 13

invertebrate

Answer 13

all animals that lack a backbone, or vertebral column

Question 14

chordate

Answer 14

Organisms that exhibit four characteristics during at least one stage of life.<br></br><br></br>(dorsal, hollow nerve chord, notochord, tauil that extends beyond the anus, pharyngeal)

Question 15

notochord

Answer 15

long supporting rod that reuns through the body just below the nerve chord

Question 16

pharyngeal pouch

Answer 16

paired structures in the throat region, which is also called the pharynx.

Question 17

vertebrate

Answer 17

Chordates with backbones

Question 18

feedback inhibition

Answer 18

system in which the product or result of a process limits the process itself

Question 19

radial symmetry

Answer 19

any number of imaginary planes drawn through the center of the body could divide it into equal halves

Question 20

bilateral symmetry

Answer 20

a single imaginary plane divides the body into left and right sides that are mirror images of one another

Question 21

coelom

Answer 21

body cavity that develops within the mesoderm and is completely lined with tissue derived from mesoderm.

Question 22

pseudocoelom

Answer 22

partially ined with mesoderm

Question 23

zygote

Answer 23

fertilized egg

Question 24

blastula

Answer 24

hollow ball of cells like an inflated balloon

Question 25

protostomes

Answer 25

phyla where the blastopore becomes the mouth

Question 26

deuterostomes

Answer 26

phyla where the blastopore becomes the anus and the mouth is foremd from the second opening that develops

Question 27

cephalization

Answer 27

the concentration of sense organs and nerve cells at their anterior end.