(7.11 & 7.12)

Question 1

Define the term negative feedback

Answer 1

A biological response which returns reactions and conditions within the body to optimal conditions or equilibrium

Question 2

Define the term positive feedback

Answer 2

A reaction where the products of this reaction cause an increase in intensity of the reaction that has just occurred

Question 3

Define the term homeostasis

Answer 3

A state of balance within all the body’s systems which are needed for optimal survival and functioning

Question 4

Explain how temperature changes are detected

Answer 4

Changes in temperature are detected via thermoreceptors located in the hypothalamus and under the skin

Question 5

Explain the corrective mechanisms that are activated to lower body temperature

Answer 5

Sweat is produced from the sweat glands. Sweat lowers body temperature by making the body use heat produced to break hydrogen bonds in order for sweat to evaporate
As well as this, vasodilation occurs directing more blood towards the surface of the skin