KA4 Metabolism In Conformers And Regulation

Question 1

What abiotic factors affect an organisms ability to maintain its metabolic rate

Answer 1

Temperature
PH
Salinity

Question 2

What are conformers

Answer 2

Organisms whose internal environment is dependent on the external environment

Condiments use behavioural response to tolerant variation in their external environment o maintain their optimum metabolic rate

Question 3

What is an advantage and disadvantage of conformers

Answer 3

Advantage - have lower metabolic costs
Disadvantage- narrower range of ecological niches

Question 4

What Is a regulator

Answer 4

Organisms who maintain their internal environment regardless of their external environment

Regulators use metabolism to control their internal environment

Question 5

What is an advantage and disadvantage of regulators

Answer 5

Advantage - wider range of ecological niches
Disadvantage- higher metabolic costs

Question 6

What is homeostasis

Answer 6

Maintaince if the body’s internal environment within a tolerant limit despite changes in the external environment
Regulators requires energy to achieve homeostasis

Question 7

What is thermoregulation

Answer 7

The regulation of internal body temperature
The hypothalamus is the temperature monitoring centre in the brain

Question 8

What is the negative feedback control of thermoregultion

Answer 8

Normal level of body’s internL environment Z known as the set point

Receipts direct any change from this point

Hormonal or nerve messages are sent to effector

The effector responds and corrects the change returning to the set point

Question 9

Why is regulating temperature so important

Answer 9

Optimal enzyme activity
Hugh diffusion rates
Neeed to maintain metabolism

Question 10

Why are corrective responses to increased body temperature

Answer 10

Sweating
Body heat used to evaporate water in the sweat cooling the skin

Vasodilation of blood vessels
Increased blood flow to the skin
Increases heat loss

Decreased metabolic rate
Less heat produced

Question 11

What are the corrective responses to decreased body temperature

Answer 11

Shivering
Rapid muscle contraction generate heat

Vasoconstriction of blood vessels
Decrease blood flow to te skin and decreases heat loss

Increased metabolic costs
More heat produces

Hair erector muscle contraction
Traps a layer insulting air to reduce heat loss by radiation