CH 25 study guide Flashcards
What are the characteristics of all animals? (there are five)
members of the kingdom Animalia, multicellular, heterotrophic. eukaryotic organisms whose cells lack cell walls
Four characteristics of chordates?
a dorsal, hollow nerve chord, a notochord (a tail that extends beyond the anus.) and pharyngeal pouches
What is feedback inhibition? Give an example.
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.
What are the features of animal body plans?
levels of organization, body symmetry, differentiation of germ layers, formation of body cavities, patterns of embryological development, segmentation, cephalization, and limb formation
What are the two types of symmetry? Which is the most successful?
radial symmetry, and bilateral symmetry; bilateral symmetry
Name the three germ layers
endoderm, mesoderm, ectoderm
what does the endoderm germ layer do?
Is the innermost germ layer, develops into the linings of the digestive tract and much of the respiratory system.
what does the mesoderm germ layer do?
Is the middle layer, gives rise to muscles and much of the circulatory, reproductive, and excratory organ systems.
what does the ectoderm layer do?
The outermost layer, produces sense organs, nerves, and the outer layer of the skin
Difference between protostomes and deuterostomes. Which are we?
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.
What is the difference between a coelom and pseudocoelom?
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.
What is the first stage of development following conception?
A zygote, or fertilized egg.
invertebrate
all animals that lack a backbone, or vertebral column
chordate
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)
notochord
long supporting rod that reuns through the body just below the nerve chord
pharyngeal pouch
paired structures in the throat region, which is also called the pharynx.
vertebrate
Chordates with backbones
feedback inhibition
system in which the product or result of a process limits the process itself
radial symmetry
any number of imaginary planes drawn through the center of the body could divide it into equal halves
bilateral symmetry
a single imaginary plane divides the body into left and right sides that are mirror images of one another
coelom
body cavity that develops within the mesoderm and is completely lined with tissue derived from mesoderm.
pseudocoelom
partially ined with mesoderm
zygote
fertilized egg
blastula
hollow ball of cells like an inflated balloon
protostomes
phyla where the blastopore becomes the mouth
deuterostomes
phyla where the blastopore becomes the anus and the mouth is foremd from the second opening that develops
cephalization
the concentration of sense organs and nerve cells at their anterior end.
