GR 12 RESPONDING TO ENVIRONMENT- NERVOUS SYSTEM: EXAM BOOKLET MCQ PART 2

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Name *

Surname *

Teacher *

Mrs Clulow

Mrs Vissian

Ms Viljoen

1.18. The part of the brain that receives nerve impulses from the semi-circular canals is the... *

cerebrum.

cerebellum.

hypothalamus.

medulla oblongata.

1.19. A light stimulus is converted into a nerve impulse in the... *

iris.

retina.

optic nerve.

sclera.

1.20. Which ONE of the following statements is CORRECT regarding the eyes represented in the diagrams below? *

Diagram A is looking at an object closer than 6m, while diagram B is looking at an object further than 6m.

Diagram A is looking at an object further than 6m, while diagram B is looking at an object closer than 6m.

The eye in diagram A is in dim light and the eye in diagram B is in bright light.

The eye in diagram A is in bright light and the eye in diagram B is in dim light.

1.21. The part of the brain that is responsible for higher thought processes is the... *

cerebellum.

medulla oblongata.

hypothalamus.

cerebrum.

1.22. The central nervous system is made up of the... *

cranial and spinal nerves.

brain and spinal cord.

sympathetic and parasympathetic nerves.

autonomic and peripheral nervous systems.

1.23. Which ONE of the following is the dark-coloured layer of the eye, which is rich in blood vessels? *

Conjunctiva

Sclera

Cornea

Choroid

1.24. Which ONE of the following parts of the eye contains the photoreceptors? *

Retina

Iris

Sclera

Vitreous humour

1.25. Which structures in the eye are responsible for the refraction of light? *

Pupil and iris

Blind spot and yellow spot

Cornea and lens

Sclera and suspensory ligaments

1.26. The nerve impulse in the axon of a sensory neuron is transmitted... *

towards the dendrite of the sensory neuron.

towards the cell body of the sensory neuron.

away from the effector organ.

away from the cell body.

1.27. Which part of the ear converts pressure waves into nerve impulses? *

Auditory nerve

Organ of Corti

Eustachian tube

Auditory canal

1.28. A person can feel pain in his legs but cannot move his legs. This is a result of damage to the... *

sensory neuron.

sensory and motor neuron.

motor neuron.

sensory and interneuron.

1.29. Colour vision is difficult at night, because under dim light conditions... *

rods are not stimulated.

the pupil dilates.

cones are not stimulated.

the lens cannot change shape.

1.30. Depth perception refers to the ability to judge distance. An investigation was carried out to determine the effect of using one eye only or both eyes on depth perception. Participants were asked to thread a needle as a test of depth perception. The number of attempts needed to successfully thread the needle was counted when using one eye only and then when using both eyes. The results of the investigation are provided in the table below. The results of this investigation show that... *

binocular vision reduces depth perception.

using one eye only increases depth perception.

the number of eyes used has no effect on depth perception.

binocular vision increases depth perception.

1.31. Which ONE of the following refers to a part of the nervous system that is involved in the regulation of body temperature? *

Corpus callosum

Cerebellum

Hypothalamus

Spinal cord

1.32. A function of the medulla oblongata is to... *

control higher thought processes.

regulate blood glucose levels.

regulate breathing.

inhibit voluntary movement.

1.33. A disorder of the brain that is characterised by memory loss and confusion is... *

Alzheimer's disease.

haemophilia.

multiple sclerosis.

Down syndrome.

1.34. Which ONE of the following is a part of the ear where grommets are inserted? *

Oval window

Semi-circular canal

Tympanic membrane

Pinna

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