2.4 Metabolism in Conformers & Regulators

Question 1

the ability of an organism to maintain is metabolic rate is affected by…

Answer 1

external abiotic factors

Question 2

external abiotic factors (3)

Answer 2

• temperature
• salinity
• pH

Question 3

conformers’ … is dependent upon the …

Answer 3

conformers’ internal environment is dependent upon the external environment

Question 4

conformers use what to maintain their optimum metabolic rate?

Answer 4

behavioural responses

Question 5

behavioural responses allow conformers to do what?

Answer 5

to tolerate variation in their external environment while maintaining optimum metabolic rate

Question 6

conformers have … metabolic costs

Answer 6

low

Question 7

conformers are restricted to a … ecological niche

Answer 7

narrow

Question 8

why are conformers restricted to a narrow ecological niche?

Answer 8

because they are less adaptable to environmental change

Question 9

regulators maintain … regardless of …

Answer 9

regulators maintain their internal environment regardless of external environment

Question 10

regulators use what to maintain their internal environment?

Answer 10

metabolism

Question 11

regulators have a … range of ecological niches

Answer 11

wide

Question 12

why do regulators have a wide range of ecological niches?

Answer 12

because of their control over their internal environment

Question 13

regulation of internal environment requires what?

Answer 13

energy to achieve homeostasis

Question 14

regulators have … metabolic costs

Answer 14

high

Question 15

hypothalamus

Answer 15

temperature monitoring centre of the brain

Question 16

thermoregulation involves (3)

Answer 16

• hypothalamus
• nerves
• effectors

Question 17

thermoregulation process (3)

Answer 17

• receptors detect change in body temp
• information communicated via electrical impulses through nerves to effectors
• effectors bring about corrective responses to return temp to normal

Question 18

methods of decreasing body temperature (3)

Answer 18

• sweating
• vasodilation
• decreased metabolic rate

Question 19

sweating

Answer 19

body heat is used to evaporate water in sweat, cooling skin

Question 20

vasodilation

Answer 20

increased blood flow to skin increases heat loss

Question 21

decreased metabolic rate

Answer 21

less heat is produced

Question 22

methods of increasing body temperature (4)

Answer 22

• shivering
• vasoconstriction
• hair erector muscles contract
• increased metabolic rate

Question 23

shivering

Answer 23

muscle contraction generates heat

Question 24

vasoconstriction

Answer 24

decreased blood flow to skin decreases heat loss

Question 25

hair erector muscles contract

Answer 25

traps a layer of insulating air

Question 26

increased metabolic rate

Answer 26

more heat produced

Question 27

the regulation of body temperature allows… (2)

Answer 27

• optimal enzyme activity
• high diffusion rates
• (these maintain metabolism)