Lecture 4 Block 2

Question 1

define regulators

Answer 1

use mechanisms of homeostasis to moderate changes in internal environments, even though external environment might be changing

Question 2

define conformers

Answer 2

allow body parameters to track those of environment

Question 3

define endotherm

Answer 3

use metabolic heat to maintain high stable body temp. body temp often differs from temperature of the environment and tend to regulate

Question 4

define ectotherm

Answer 4

use energy from the environment to adjust body temp, can regulate and/or conform

Question 5

define homeotherm

Answer 5

keep body temperature relatively constant

Question 6

define heterotherm

Answer 6

allow body temperature to fluctuate

Question 7

define poikilotherm

Answer 7

an organism that can’t regulate its body temp except by behavioral mechanisms whose internal temperature varies considerable

Question 8

what is the heat transfer equation

Answer 8

Q = hA(Thot-Tcold)/d

Question 9

what is heat capacity

Answer 9

amount of energy required to heat some mass by one degree

Question 10

what are some methods of regulation

Answer 10

gain external heat, avoid heat loss, generate more internal heat, lose excess internal heat, avoid heat gain

Question 11

what are the modes of heat transfer

Answer 11

conduction, convection, radiation, evaporation

Question 12

list some factors that affect modes of heat transfer

Answer 12

shape, surface area, conductivity, thermal gradient, surface temperature, surface color, humidity gradient, surface temperature, rate of fluid movement