The diagrams below show the human brain and human kidney - 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 - 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 to allow for communication between the two hemispheres of the brain.
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 Adrenaline.
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 allows for more oxygen to be inhaled, which is transported in the blood to the skeletal muscles. An increase in heart rate pumps more blood, which also carries glucose, to the muscles. This combination enhances the rate of cellular respiration, resulting in increased energy production.
Step 6
Describe how part B is involved in carbon dioxide homeostasis.
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Answer
Part B, which is the medulla oblongata, is stimulated to monitor the carbon dioxide levels in the blood. It sends impulses to the heart and breathing muscles to adjust the rate of breathing, ensuring that carbon dioxide is exhaled efficiently and levels are returned to normal.
