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Coordination in animals
Revision exercise 2 a response?
(a) sensory neurone
Choose the most correct answer.
1. Which type of drug affects the brain (b) relay neurone
by slowing down its activity and (c) motor neurone
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causing drowsiness? (d) intermediate neurone
(a) stimulant 4. The human body relies on different
(b) hallucinogen systems to coordinate and regulate
(c) sedative functions. Which two systems work
(d) depressant together to achieve coordination?
(a) nervous and endocrine systems
2. Which part of the brain is located at the (b) digestive and respiratory systems
posterior end and connects directly (c) circulatory and nervous systems
to the spinal cord? (d) immune and reproductive systems
(a) medulla oblongata
(b) forebrain 5. The forebrain is responsible for various
higher-order functions. Which of the
(c) midbrain following is NOT a function of the
(d) hindbrain forebrain?
(a) imagination
3. When a person reacts to a stimulus,
which type of neurone transmits (b) thinking
impulses from the brain or spinal (c) balance
cord to the effector organ to produce (d) seeing
6. Match the parts of the eye in Column A with the correct function in Column
B by writing the letter of the correct answer next to the corresponding number
of the question in Column A.
Column A Column B
i. Eyebrow A. Controls shape of the pupil
B. Formation of tears
ii. Pupil C. Kills microorganisms entering into the eye
D. Alter the shape of the lens
iii. Eye lid
E. Bend light rays to the retina
iv. Choroid layer F. Control the amount of light rays entering into the eye
G. Comprises sensitive cells in the retina
v. Iris H. Contain network of blood vessels that supply oxygen to the eye
I. Maintaining shape of the eyeball
vi. Eye lashes J. Protecting the eye from sweat and debris
K. Cover and protect the cornea
vii. Conjunctiva
L. Keep the eye moistened
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BIOLOGY FORM 3 FINAL EDITED 16.09.2025.indd 62 KAMISHNA 23/10/2025 11:52:40
BIOLOGY FORM 3 FINAL EDITED 16.09.2025.indd 62
KAMISHNA
