1.5.1 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 - NSC Life Sciences - Question 1 - 2018 - Paper 1
Question 1
1.5.1 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 horm... show full transcript
Worked Solution & Example Answer:1.5.1 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 - NSC Life Sciences - Question 1 - 2018 - Paper 1
Step 1
Identify EACH of the following:
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Answer
(a) The gland that secretes hormone A: The gland responsible for the secretion of hormone A is the pituitary gland, also known as the hypophysis.
(b) Hormone B: The hormone referred to is thyroxin.
Step 2
Name the mechanism in the diagram that regulates the level of hormone B.
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Answer
The mechanism illustrated in the diagram that regulates the level of hormone B is known as the negative feedback mechanism.
Step 3
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
If half of gland X is removed, less hormone B (thyroxin) will be secreted due to reduced functional gland tissue.
Consequently, this may lead to the secretion of more hormone A (TSH) as the body attempts to compensate for the lower levels of hormone B.
