Lecture 3 Block 2 Flashcards

(27 cards)

1
Q

when is heat balance achieved

A

when heat gained is equal to heat loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what does heat balance take into consideration

A

metabolic heat production, conductive heat exchange, convective heat exchange, radiative heat exchange, and evaporative heat exchange

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

is heat gained or lost with metabolic heat production

A

gained

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

is heat gained or lost with conductive heat exchange

A

gain or lost

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

is heat gained or lost with convective heat exchange

A

gain or loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

is heat gained or lost with radiative heat exchanged

A

gain or loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

is heat gained or lost with evaporative heat exchange

A

lost

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

why is the effect of temperature biphasic

A

because there’s a direct relationship between temp and reactions rates below the thermal optima, but an indirect relationship between temp and reaction rates above the thermal optima

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what does Q10 tell you

A

how dependent that process or rate is on temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is homeoviscous adaptation

A

compositional adaptation of membrane lipids to maintain correct fluidity despite outer conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is conduction

A

direct molecular transfer of energy from a warmer surface to a cooler surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is convection

A

conduction coupled to air or fluid movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is radiation

A

emission of photons from any surface above a temperature of absolute zero

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is evaporation

A

change of state of water from a liquid to a vapor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is the rate of diffusion equation

A

k x A x (P2- P1)/D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the Q10 equation

A

Q10 = (Kt + 10)/ Kt

17
Q

how are respiratory and cardiovascular systems similar

A

both work through muscles to ventilate vascular surfaces for oxygen

18
Q

how do the respiratory and cardiovascular system each use diffusion

A

cardiovascular system uses capillaries of the body, respiratory system uses capillaries of the lungs

19
Q

how do the respiratory and cardiovascular system each use convection

A

respiratory- moves air in and out of lungs to ventilate alveoli
cardiovascular- bulk movement of blood through vessels

20
Q

what does homeeoviscous adaptation affect

A

fatty acid chain length, saturation, phospholipid classes, cholesterol content

21
Q

describe fatty acids in animals adapted to cold temperatures

A

they have membranes with fatty acids that have shorter chains that are more unsaturated, creates double bonds that interfere with stacking of neighboring tails, more flexible at lower temps

22
Q

do shorter chains have higher or lower fluidity

23
Q

describe fatty acids in warm adapted animals

A

they have highly saturated FA tails, which allows for close stacking of neighboring tails and thermostability at high temperatures

24
Q

which animals have more cholesterol in their membranes

A

animals adapted to higher temperatures

25
does cholesterol loosen or stiffen the membrane
stiffen
26
what can temperature changes alter
the structure of the enzyme, enzyme0 substrate affinity, enzymes ability to undergo structural shifts, KE of substrate
27
describe the enzymes of animals adapted to higher temperatures
they have enzymes with higher thermal optima and lower catalytic rates