CH1

Question 1

describe homeostasis

Answer 1

regulation
set points
senors that feeds to control center
feed back control (+/- feedback affects)
feedback loop

Question 2

change in one direction, response is in opposite direction
ex: blood sugar regulation
cancel each other= net change

Answer 2

negative feedback control

Question 3

exaggerates change; keep moving in same direction
ex: breastfeeding, birth, fever
involves breaking cycle at some point

Answer 3

positive feedback control

Question 4

how do we understand evolving traits?

Answer 4

evolution by natural selection

Question 5

organisms adapting to environment

mainly genetic and phylogenetic adaptations

Answer 5

evolution

Question 6

other ways of evolution

Answer 6

genetic drift, mutation, migration (gene flow)

Question 7

type of evolution when population (N) is small

Answer 7

genetic drift

Question 8

type of evolution when rate is low (10^-6)

most are eliminated bc disrupts normal gene

Answer 8

mutation

Question 9

type of evolution when theres high gene flow

Answer 9

migration (gene flow)

Question 10

mutation provides for variables

Answer 10

evolution by natural selection

Question 11

3 key components of evolution

Answer 11

phenotypic variation
genetic (hereditary) bases of traits
environment provides selection

Question 12

why is phenotype trait advantageous

Answer 12

increase in frequency in each generation

Question 13

physiology is _______

Answer 13

quantiative

Question 14

how is physiology quantitative?

Answer 14

measures- mass, length,volume (metric)

concentrations- % solutions (g/mL)

Question 15

resistance and velocity of a capollary

Answer 15

resistance of blood flow- area of cylinder

velocity of blood flow- volume of cylinder

Question 16

formula for volume and SA

Answer 16

V= l X w X h     (uL)
SA= l X w X 6