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6 (a) A person's mass is partially influenced by the alleles they inherit from their parents - Edexcel - GCSE Biology Combined Science - Question 6 - 2023 - Paper 1
Question 6
6 (a) A person's mass is partially influenced by the alleles they inherit from their parents. Give two other factors that can influence a person's mass. (2) (b) Fig... show full transcript
Worked Solution & Example Answer:6 (a) A person's mass is partially influenced by the alleles they inherit from their parents - Edexcel - GCSE Biology Combined Science - Question 6 - 2023 - Paper 1
Step 1
Step 2
b) Comment on the data and the health risks to this patient.
Answer
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BMI: With a BMI of 28, the patient falls into the overweight category, indicating a higher risk for health issues such as cardiovascular disease and diabetes.
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Waist to hip ratio: A ratio of 0.85 suggests that the patient may have abdominal obesity, which is a risk factor for various metabolic conditions.
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Alcohol consumption: The patient consumes 3–4 units of alcohol per day, which exceeds the recommended limit of 14 units per week, raising concerns over liver health and potential addiction.
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Smoking: The patient does not smoke, which is a positive factor for overall health.
Step 3
c) Describe the structure and function of a reflex arc.
Answer
The reflex arc consists of:
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Receptor: A sensory receptor that detects a stimulus (e.g., pain).
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Sensory neuron: This neuron transmits the sensory information to the central nervous system (CNS).
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Integration center: Typically consists of one or more interneurons in the CNS that process the information and determine the response.
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Motor neuron: This neuron carries the command from the CNS to the effector.
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Effector: A muscle or gland that executes the response (e.g., pulling away from a hot surface).
Functionally, a reflex arc allows for rapid responses to stimuli without the need for conscious thought, enhancing survival by enabling quick reactions to potentially harmful situations.