Q1 MCQ Drill: 2024 Life Sciences P1 (2024 NSC October/November National Examination)

Life Sciences Past Paper Question 1 Drill Level 1: Knowledge & Recall

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7 multiple-choice questions taken verbatim from Section A of the official 2024 NSC October/November National Examination Life Sciences Paper 1, auto-marked against the official marking guideline. Questions that rely on diagrams or graphs are excluded - see the full paper for those.

Question 1 of 7 2 Marks

The hormone responsible for the regulation of salt content in the human body is …

A. testosterone.

B. aldosterone.

C. prolactin.

D. glucagon.

Question 2 of 7 2 Marks

Which ONE of the following is a stage in human embryonic development?

A. Choroid

B. Amnion

C. Morula

D. Chorion

Question 3 of 7 2 Marks

When the carbon dioxide level in the blood increases above normal, the …

A. rate and depth of breathing decrease.

B. receptor cells in the diaphragm are stimulated.

C. heart beats slower.

D. receptor cells in the carotid artery in the neck are stimulated.

Question 4 of 7 2 Marks

Which ONE of the following changes occurs under the influence of adrenalin?

A. An increased blood supply to the skeletal muscles

B. Decreased blood pressure

C. Decreased muscle tone of skeletal muscles

D. An increased blood supply to the digestive system

Question 5 of 7 2 Marks

A girl is barefoot and steps onto a thorn, causing a reflex action. Which ONE of the following represents the CORRECT pathway of the reflex arc?

A. Pain receptor ✓ motor neuron ✓ sensory neuron ✓ leg muscle

B. Foot muscle ✓ sensory neuron ✓ motor neuron ✓ pain receptor

C. Foot muscle ✓ motor neuron✓ sensory neuron✓ pain receptor

D. Pain receptor ✓ sensory neuron ✓ motor neuron ✓ leg muscle

Question 6 of 7 2 Marks

Which ONE of the following is involved in thermoregulation?

A. Corpus callosum

B. Hypothalamus

C. Cerebellum

D. Spinal cord

Question 7 of 7 2 Marks

The following is a list of factors regarding a developing foetus: (i) Temperature regulation (ii) Protection (iii) Free movement (iv) Nutrition For which combination of factors is the amniotic fluid responsible?

A. (i), (ii) and (iii) only

B. (i) and (iv) only

C. (ii) and (iii) only

D. (i), (ii), (iii) and (iv)

Q1 MCQ Drill: 2024 Life Sciences P1 (2024 NSC October/November National Examination)

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