Identify EACH of the following:
(a) The gland that secretes hormone A
(b) Hormone B
1.5.2 Name the mechanism in the diagram that regulates the level of hormone B - NSC Life Sciences - Question 1 - 2018 - Paper 1
Question 1
Identify EACH of the following:
(a) The gland that secretes hormone A
(b) Hormone B
1.5.2 Name the mechanism in the diagram that regulates the level of hormone B.... show full transcript
Worked Solution & Example Answer:Identify EACH of the following:
(a) The gland that secretes hormone A
(b) Hormone B
1.5.2 Name the mechanism in the diagram that regulates the level of hormone B - NSC Life Sciences - Question 1 - 2018 - Paper 1
Step 1
The gland that secretes hormone A
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Answer
The gland that secretes hormone A is the pituitary gland (or hypophysis). This gland plays a critical role in regulating various hormones in the body.
Step 2
Hormone B
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Answer
Hormone B is known as thyroxine. It is produced by the thyroid gland and regulates metabolism in the body.
Step 3
Name the mechanism in the diagram that regulates the level of hormone B
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Answer
The mechanism that regulates the level of hormone B is referred to as negative feedback. This is a system where an increase in a substance leads to a decrease in its production.
Step 4
State TWO possible effects that this would have on the secretion of the hormones referred to in the diagram above
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Answer
With half of gland X (the pituitary) removed, less hormone B (thyroxine) will be secreted due to a reduced stimulus for its secretion.
A potential response could be that more hormone A (TSH) will be secreted, as the body tries to compensate for the lower levels of hormone B.
