Metabolism in Conformers and Regulators

Question 1

Mechanism adopted by some conformers (unable to employ physiological mechanisms) to maintain an optimum metabolic rate.

Answer 1

Behavioural response

Question 2

Body core

Answer 2

Vital organs of body normally at “deep body” temperature of around 37°C.

Question 3

Body shell

Answer 3

Outer layer and limbs of body which have a “superficial body” temperature of around 33°C.

Question 4

Conformer

Answer 4

Organism unable to control its internal environment and dependant on its external environment.

Question 5

Ectotherm

Answer 5

Animal which is unable to regulate its body temperature by physiological means.

Question 6

Muscle or gland which performs the body’s response to stimuli following receipt of signals from the nervous system.

Answer 6

Effector

Question 7

Endotherm

Answer 7

Animal which is able to regulate its body temperature by physiological means.

Question 8

Region of the brain containing a centre which regulates body temperature.

Answer 8

Hypothalamus

Question 9

Internal environment

Answer 9

Human body’s community of cells and the fluid that bathes them.

Question 10

Negative feedback

Answer 10

Mechanism of homeostasis whereby a change in a physiological factor triggers a response that counteracts the original change.

Question 11

Physiological homeostasis

Answer 11

Maintenance of body’s internal environment within tolerable limits by negative feedback control.

Question 12

Regulator

Answer 12

Organism able to control its internal environment and be independent of its external environment.

Question 13

Thermoreceptor

Answer 13

Structure which detect changes in body temperature.

Question 14

Thermoregulation

Answer 14

Maintenance of a mammal’s internal body temperature within a tolerable range.

Question 15

Vasoconstriction

Answer 15

Process by which the bore of skin arterioles becomes narrower.

Question 16

Vasodilation

Answer 16

Process by which the bore of skin arterioles becomes wider.