2017 - WAEC Biology Past Questions and Answers - page 2
11
Which of the following actions does not occur during exhalation in man?
A
Thoracic cavity decreases in volume
B
Diaphragm flattens
C
Ribs move down and in
D
Air pressure increases in the thoracic cavity
12
The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is found in the part labelled II only?
A
Lipid
B
Glucose
C
Urea
D
Uric acid
13
The diagram above is an illustration of the urinary tubule in a mammal. The part which contains lowest concentration of urea is labelled
A
I
B
II
C
III
D
IV
14
The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is greater in concentration in the part labelled IV when compared to that part labelled I?
A
Lipid
B
Glucose
C
Urea
D
Uric acid
15
Deamination of amino acids in the liver produces
A
blood sugar
B
glycogen
C
bile
D
urea
16
Which of the following glands also serves as an exocrine gland?
A
Ovary
B
Pancreas
C
Adrenal
D
Thyroid
17
Which of the following sequences is the correct route of the transmission of impulses along a reflex arc?
A
\(Receptor\to sensory neuron \to synapse \to intermediate neuron \to synapse \to motor neuron \to effector\)
B
\(Receptor \to motor neuron \to synapse \to intermediate neuron \to synapse \to sensory neuron \to effector\)
C
\(Effector \to intermediate neuron \to synapse \to motor neuron \to synapse \to sensory neuron \to receptor\)
D
\(Effector \to motor neuron \to synapse \to sensory neuron \to synapse \to intermediate neuron \to receptor\)
18
When viewing an object that is close to the human eye, the
A
eye lens becomes thin
B
ciliary muscles relax
C
suspensory lens become taut
D
eye lens becomes fat
19
The diagram above is an illustration of the human sperm. The part labelled I is the
A
acrosome
B
nucleus
C
mitochondrion
D
tail
20
In the diagram of the human sperm above, the function of the part labelled II is to
A
fuse the ovum during fertilization
B
generate the energy for the sperm to swim to the fallopian tube
C
help the sperm to swim forward
D
dissolve the membrane of the egg during fertilization
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