Font size
WorksheetsStimuli, Receptors and Responses - Part 1
Total questions: 12
Worksheet time: 9mins
A receptor
is able to produce a response.
is able to detect a stimulus.
is able to initiate nerve impulses.
is able to give sensation.
Where can you find receptors?
Iris
Retina
Cochlea in inner ear
Lens
Corena
is the anterior portion of sclear.
is transparent to allow light to penetrate into the eyeball.
is curved to allow refraction of light.
has blood capillaries to supply oxygen and nutrients to the living cells here.
The anterior portion of choroid
has black pigment to prevent internal reflection of light.
has ciliary muscles to adjust the thickness/convexity of the lens.
has circular and radial muscles to control the size of the pupil.
has blood capillaries to supply oxygen and nutrients to the living cells here.
Retina
has photoreceptors, rods and cones.
has an even distribution of photoreceptors across the layer.
has a blind spot with no photoreceptors.
has sensory neurones attaching to photoreceptors.
Visual sensation is provided by
rods.
cones.
optic nerve.
optic centre of cerebral cortex.
Which of the following structures are involved to allow a clear image being formed on the yellow spot?
sclera, choroid and retina
corena, aqueous humour, lens, vitretous humour and retina
corena, aqueous humour, iris, vitreous humour and retina
What is the consequence if one has cloudy lens?
No image is formed on retina.
Blurred image is formed on retina.
No visual sensation is observed.
Visual sensation is impaired.
Which of the following serve(s) as effector(s)?
pupil
suspensory ligament
circular iris muscle
cilary muscle
When one is observing a car approaching him,
his ciliary muscle contracts.
his suspensory ligaments contract.
tension of suspensory ligaments is reduced.
his lens becomes thicker.
Short sight is due to
insufficient rods and cones on the retina.
the eyeball is too long.
the lens is too thin.
the optic nerve is damaged.
Red-green colour blindness is due to
insufficient number of red and/or green cones.
insufficient number of rods.
damaged optic nerve.
inability of the optic centre of cerebral cortex to interpret sensory nerve impulses from cones.
