Questions and Answers

Identify in diagrams and images specific endocrine glands and state the hormones they secrete, limited to: (a) adrenal glands and adrenaline (b) pancreas and insulin (c) testes and testosterone (d) ovaries and oestrogen

Describe a hormone as a chemical substance, produced by a gland and carried by the blood, which alters the activity of one or more specific target organs

Identify in diagrams and images the position of the fovea and state its function

Outline the function of rods and cones, limited to: (a) greater sensitivity of rods for night vision (b) three different kinds of cones, absorbing light of different colours, for colour vision

Describe the distribution of rods and cones in the retina of a human

Explain the pupil reflex in terms of the antagonistic action of circular and radial muscles in the iris

Explain the pupil reflex, limited to changes in light intensity and pupil diameter

Describe the function of each part of the eye, limited to: (a) cornea – refracts light (b) iris – controls how much light enters the pupil (c) lens – focuses light on to the retina (d) retina – contains light receptors, some sensitive to light of different colours (e) optic nerve – carries impulses to the brain

Identify in diagrams and images the structures of the eye, limited to: cornea, iris, pupil, lens, retina, optic nerve and blind spot

Describe sense organs as groups of receptor cells responding to specific stimuli: light, sound, touch, temperature and chemicals