1 Insulin is produced by an endocrine gland and is transported in the blood - Edexcel - GCSE Biology - Question 1 - 2018 - Paper 1
Question 1
1 Insulin is produced by an endocrine gland and is transported in the blood.
a) (i) Which row shows the endocrine gland and the target organs for insulin?
e... show full transcript
Worked Solution & Example Answer:1 Insulin is produced by an endocrine gland and is transported in the blood - Edexcel - GCSE Biology - Question 1 - 2018 - Paper 1
Step 1
Which row shows the endocrine gland and the target organs for insulin?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct row is C. The pancreas is the endocrine gland that produces insulin, and its target organs are the liver and muscles.
Step 2
Which part of the blood transports insulin to its target organs?
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The part of the blood that transports insulin to its target organs is A. plasma, as insulin is dissolved in the plasma and circulated throughout the body.
Step 3
Explain why the blood glucose concentration then decreases.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
After a meal, blood glucose concentration rises due to the intake of carbohydrates. In response, the pancreas secretes insulin, which facilitates the uptake of glucose by cells for energy or storage as glycogen. As cells absorb glucose, the concentration of blood glucose decreases effectively, leading to lower levels once the immediate energy needs are met.
