The diagrams below show the human brain and human kidney - English General - NSC Life Sciences - Question 3 - 2021 - Paper 1
Question 3
The diagrams below show the human brain and human kidney.
3.1.1 Identify part A.
3.1.2 State ONE function of part C.
3.1.3 A person sustained a head injury in a c... show full transcript
Worked Solution & Example Answer:The diagrams below show the human brain and human kidney - English General - NSC Life Sciences - Question 3 - 2021 - Paper 1
Step 1
Identify part A.
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Answer
Part A is identified as the Cerebellum.
Step 2
State ONE function of part C.
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Answer
One function of part C is that it connects the two hemispheres of the brain and allows for communication between them.
Step 3
A person sustained a head injury in a car accident and lost his memory. Write down the LETTER and NAME of the part of the brain that was affected.
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Answer
The part of the brain that was affected is D, which is the Cerebrum.
Step 4
Name the hormone secreted by gland E in an emergency situation.
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The hormone secreted by gland E is Adrenalin.
Step 5
Explain how an increase in breathing rate and heart rate results in increased energy production in skeletal muscles.
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An increase in breathing rate means more oxygen is inhaled, which is vital for aerobic respiration in skeletal muscles. Additionally, an increased heart rate pumps more blood, which delivers more oxygen and glucose to the muscles, thus enhancing the rate of cellular respiration and energy production.
Step 6
Describe how part B is involved in carbon dioxide homeostasis.
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Part B, which is the medulla oblongata, is stimulated by the rise in carbon dioxide levels in the blood. It sends impulses to the heart and breathing muscles, increasing the rate of respiration and heart activity to expel more carbon dioxide, thus maintaining homeostasis.
