Homeostatis

Question 1

Homeostasis

Answer 1

The process of maintaining a constant internal environment within narrow limits, despite changes that take place in the external environment

Question 2

Negative feedback

Answer 2

A change from the set-point of any factor is corrected by bringing about a change in the opposite direction

Question 3

Receptor

Answer 3

Detects a change from the set point and sends information to the control centre

Question 4

Control centre

Answer 4

Processes the information and activated corrective mechanisms

Question 5

Effector

Answer 5

Responds to and corrects the change, returning conditions to set point

Question 6

Thermoregulation

Answer 6

Maintenance of a constant internal body temperature by balancing production and heat loss

Question 7

Radiation

Answer 7

Loss of heat energy from a warm body to a cooler environment

Question 8

Conduction

Answer 8

Loss of heat energy from hot to cold objects by physical contact

Question 9

Convection

Answer 9

Heat moves from hot object, rises and is replaced by cold air

Question 10

Evaporation

Answer 10

Loss of heat by using body heat to change sweat into water vapour

Question 11

Vasoconstriction

Answer 11

The construction of circular muscles in the dermal arterioles which limits the flow of blood to the capillary loops

Question 12

Vasodilation

Answer 12

The widening of blood vessels as a result of the relaxation of the blood vessels muscular walls