1.1 Various options are provided as possible answers to the following questions - NSC Life Sciences - Question 1 - 2021 - Paper 1
Question 1
1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A to D) next to the question numbers (1... show full transcript
Worked Solution & Example Answer:1.1 Various options are provided as possible answers to the following questions - NSC Life Sciences - Question 1 - 2021 - Paper 1
Step 1
1.1.1 The function of the epididymis is to ...
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Answer
The function of the epididymis is to D: store sperm until maturation. The epididymis is vital for the maturation of sperm and the storage of sperm cells until they are ready for ejaculation.
Step 2
1.1.2 Which ONE of the following is an exocrine gland?
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The correct answer is B: Prostate. The prostate gland is classified as an exocrine gland because it secretes substances directly into the urethra.
Step 3
1.1.3 Which ONE of the following combinations are the functions of the cerebellum?
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The answer is A: Both A and B. The cerebellum is responsible for interpreting sensation and controlling involuntary actions, thereby improving motor control.
Step 4
1.1.4 An endocrine organ is ...
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The correct option is C: an organ that releases hormones. Endocrine organs such as the pancreas and thyroid secrete hormones that regulate various body functions.
Step 5
1.1.5 Ovulation is stimulated by an increase in the levels of ...
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The answer is B: LH (Luteinizing Hormone). An increase in LH levels triggers ovulation, which is a critical part of the reproductive cycle.
Step 6
1.1.6 Barotrauma is a common condition...
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Barotrauma emphasizes the importance of pressure equalization within the body, especially during rapid changes in altitude or pressure environments.
Step 7
1.1.7 Which ONE of the following shows the correct combination of the hormone with its target organ?
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Answer
The correct combination is D: TSH - Thyroid gland. Thyroid-stimulating hormone (TSH) acts specifically on the thyroid gland to regulate its activity.
Step 8
1.1.8 Oogenesis takes place in the ...
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The answer is B: ovary. Oogenesis, the process of egg formation, occurs in the ovaries of females.
Step 9
1.1.9 Which ONE of the following increased the reliability of the results obtained?
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The correct choice is B: Age of volunteers. Ensuring that the volunteers are of similar age helps to control for age-related variability in reaction times.
Step 10
1.1.10 The stem grew vertically upwards...
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The clinostat is utilized in plant experiments to eliminate directional growth responses to gravity, ensuring that the plant grows straight up.
Step 11
1.2.1 The planting of the same crop on the same land repeatedly.
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The term is Monoculture. This practice can lead to soil depletion and an increase in pests.
Step 12
1.2.2 The permanent removal of trees and vegetation from an area.
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This process is known as Deforestation. It can have severe ecological impacts, including loss of biodiversity.
Step 13
1.2.3 A part of the male reproductive system used to transfer sperm to the female.
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The structure is referred to as the Penis. It plays a crucial role in reproduction.
Step 14
1.2.4 A type of vision in which both eyes are used together to focus on an object.
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This is called Binocular Vision. It allows for depth perception and a wider field of view.
Step 15
1.2.5 The structure that the Graafian follicle develops into after ovulation.
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This structure is known as Corpus Luteum. It produces hormones to maintain early pregnancy.
Step 16
1.2.6 An underground permeable rock that stores water.
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This is referred to as an Aquifer. Aquifers are crucial for water supply.
Step 17
1.2.7 The hormone that stimulates puberty in females.
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This hormone is Oestrogen. It plays a key role in the development of secondary sexual characteristics.
Step 18
1.2.8 A substance that reduces food security.
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This factor can be summed up as a Flood. Natural disasters can drastically affect food availability.
Step 19
1.2.9 A part of a neuron that speeds up the transmission of impulses.
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This is known as the Myelin sheath. It insulates the axon and enhances signal transmission.
Step 20
1.4.1 Identify part:
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Part A is identified as the Auditory nerve. This nerve transmits sound information from the ear to the brain.
Step 21
1.4.2 Give the LETTER and NAME of the part that:
(a) Creates pressure waves in the fluid of the inner ear
(b) Absorbs excess pressure waves in the inner ear to prevent the formation of an echo
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(a) Part E: Oval window.
(b) Part D: Round window. These structures play essential roles in auditory function.
Step 22
1.4.3 Name the:
Part of the brain that interprets impulses from part F.
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The Cerebellum interprets these impulses to coordinate movements and balance.
Step 23
1.4.4 Give the LETTER and NAME of the neuron that transports impulses towards the spinal cord.
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This neuron is identified as an A: Sensory neuron. It carries sensory information to the central nervous system.
Step 24
1.5.1 Name the pathway represented by the diagram.
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The pathway represented is known as a Reflex arc. It enables quick responses to certain stimuli.
Step 25
1.5.2 Give ONE advantage of this type of reaction.
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An advantage is that it minimizes injury, allowing for a prompt withdrawal from a harmful stimulus.
Step 26
1.5.3 Identify part:
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Part A represents the Interneuron/connector. It plays a critical role in relaying signals within the reflex arc.
Step 27
1.5.4 Give the LETTER and NAME of the neuron that transports impulses towards the spinal cord.
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The neuron is identified as A: Sensory neuron. It is essential for transmitting sensory information to the spinal cord.
