Temperature Control

Question 1

What is thermoregulation

Answer 1

Process where animals regulate body temp

Question 2

Maintenance of a constant body temp allows for:

Answer 2

Independence from fluctuating external conditions
Optimal activity of enzymes so metabolic processes

Question 3

What does high temp do to enzymes

Answer 3

Denature enzymes as enzymes extremely sensitive to changes in temp

Question 4

What does low temp do to enzymes

Answer 4

Slows their activity

Question 5

Consequences if reduced enzyme activity

Answer 5

Slow metabolic rate, reduce muscle activity and slow development

Question 6

Endothermic:

Answer 6

Maintain relatively constant body temp
Generate heat from within and rely principally on physiological mechanisms for control of body temp
Require an abundant food supply to satisfy their energy needs

Question 7

Exothermic:

Answer 7

Body temp tends to fluctuate as environmental temp changes
Gain heat from environment & rely on structural adaptations for control of body temp
Require less food to satisfy energy needs ; limited activity levels

Question 8

Heat balance in endothermic

Answer 8

Heat gain:
General metabolism
Muscle contraction
Radiation & conduction from environment

Heat loss:
Expiration & excretion
Evaporation of sweat
Radiation, conduction & convection to environment

Question 9

Endothermic mammals

Answer 9

Adapted to suit environment- polar bear has fur and blubber