TO
4 What is the difference between respiration and
gas exchange?​

Respiration is the release of energy from glucose or another organic chemical. Gas exchange takes place at a respiratory surface —a boundary between the external environment and the interior of the organism. Respiration occurs in cell. Gas exchange occurs in alveoli in lungs

Explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.