1. Name the part of the body which releases antidiuretic hormone (ADH) into the blood - AQA - A-Level Biology - Question 9 - 2022 - Paper 2
Question 9
1. Name the part of the body which releases antidiuretic hormone (ADH) into the blood.
2. Alcohol decreases the release of ADH into the blood.
Suggest two signs or... show full transcript
Worked Solution & Example Answer:1. Name the part of the body which releases antidiuretic hormone (ADH) into the blood - AQA - A-Level Biology - Question 9 - 2022 - Paper 2
Step 1
Name the part of the body which releases antidiuretic hormone (ADH) into the blood.
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Answer
The part of the body that releases antidiuretic hormone (ADH) into the blood is the posterior pituitary.
Step 2
Suggest two signs or symptoms which may result from a decrease in ADH.
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Answer
Dehydration/thirst that can result from reduced water retention.
Frequent urination or increased volume of urine, leading to lower fluid levels.
Step 3
Describe the effect of ADH on the collecting ducts in kidneys.
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Answer
ADH stimulates the addition of channel proteins, known as aquaporins, into the membranes of the collecting ducts. This action increases the permeability of the ducts to water, allowing more water to be reabsorbed. This process helps to concentrate the urine and reduce the overall volume of urine produced.
