Question 1Multiple choice · 1 mark
How are hormones transported?
- A in lymph only
- B in the blood
- C along nerves
- D by diffusion through tissues only
Show answer
Answer: B
Free Hormones questions for IGCSE Biology (0610), part of Coordination & response. Each question has the answer and the marking points an examiner would look for.
Generate a full Hormones worksheet →All Coordination & response questionsHow are hormones transported?
Answer: B
Which term is described by this statement?
“A hormone that increases heart rate and blood glucose concentration in ‘fight or flight’ situations.”
Answer: A
The concentration of glucose in the blood of two people, P and Q, is measured after each drinks a glucose solution. In P it rises to a peak and returns to normal within two hours. In Q it rises higher and stays high for several hours.
Name the organ that detects the rise in blood glucose and the hormone it releases.
Explain how the hormone brings the glucose concentration of P back to normal.
Suggest the condition that person Q has and how it is treated.
Explain how the body responds when blood glucose falls too low, and why this is an example of negative feedback.
Compare nervous and hormonal control in terms of speed and duration of response.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | pancreas; insulin pancreas B1 insulin B1 | 2 |
| (b) | Insulin travels in the blood to the liver (and muscles); glucose converted to glycogen and stored; cells take up more glucose carried in blood to target organ / liver B1 glucose converted to glycogen B1 stored in liver/muscles / more glucose taken up by cells B1 | 3 |
| (c) | Type 1 diabetes; insulin injections and controlled diet (monitoring) (type 1) diabetes B1 insulin injections / control carbohydrate intake B1 | 2 |
| (d) | Glucagon released from pancreas; liver converts glycogen to glucose; change is detected and reversed back towards the set point glucagon (from pancreas) B1 glycogen → glucose in liver B1 response reverses the change, returning to set point B1 | 3 |
| (e) | Nervous: faster, short-lived; hormonal: slower, longer-lasting nervous faster / hormonal slower B1 nervous short-lived / hormonal longer lasting B1 | 2 |
Insulin and glucagon control the concentration of glucose in the blood.
Name the organ that secretes insulin.
Explain what happens when blood glucose concentration rises after a meal.
Explain how type 1 diabetes is treated.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | pancreas pancreas B1 | 1 |
| (b) | insulin released; glucose to glycogen in liver the pancreas secretes insulin B1 insulin causes the liver (and muscles) to convert glucose to glycogen B1 blood glucose falls B1 | 3 |
| (c) | insulin injections; diet insulin injections B1 monitoring blood glucose and controlling diet B1 | 2 |
Adrenaline is released in “fight or flight” situations.
Name the gland that secretes adrenaline.
Describe three effects of adrenaline on the body.
Compare nervous and hormonal control.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | adrenal gland adrenal gland B1 | 1 |
| (b) | heart rate up; breathing up; pupils dilate; blood glucose up Any 3 of: increased heart rate; increased breathing rate; increased blood glucose concentration; dilated pupils B3 | 3 |
| (c) | nerves faster, short; hormones slower, longer nervous: electrical impulses, faster, short-lived B1 hormonal: chemicals in blood, slower, longer-lasting B1 | 2 |
Hormones are chemical messengers.
Define a hormone.
Name the hormone produced by the testes and the hormone produced by the pancreas that lowers blood glucose.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | chemical produced by gland, carried by blood, alters activity of targets Any 2 of: a chemical substance produced by a gland; carried by the blood; which alters the activity of target organs B2 | 2 |
| (b) | testosterone; insulin testosterone B1 insulin B1 | 2 |
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