Home / iGCSE Biology (0610)-14.3 Hormones – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-14.3 Hormones – iGCSE Style Questions Paper 1

IGCSE Biology (0610) Practice Questions Paper 1 - All Chapters

Question

The diagram shows the position of two glands in the body.

Which row states the hormones produced by these glands?

 
▶️ Answer/Explanation
To solve this, we must first identify the glands based on their anatomical positions. Gland $1$ is located on top of the kidneys, identifying it as the adrenal gland, which secretes the hormone adrenaline. Gland $2$ is situated in the curve of the duodenum, identifying it as the pancreas, which secretes the hormone insulin (as well as glucagon). While the pancreas also produces digestive enzymes like amylase and lipase, the question specifically asks for hormones. Amylase and lipase are enzymes, not hormones, which eliminates options B, C, and D.
✅ Answer: (A)

Question

Which hormone is produced by the pancreas?

(A) adrenaline
(B) insulin
(C) oestrogen
(D) testosterone
▶️ Answer/Explanation

The pancreas is a unique organ that functions as both an endocrine and exocrine gland. Its endocrine part, specifically the Islets of Langerhans, produces the hormone insulin to lower blood glucose levels. Adrenaline is secreted by the adrenal glands during stress or “fight or flight” situations. Oestrogen and testosterone are sex hormones produced primarily by the ovaries and testes, respectively. Therefore, insulin is the only hormone in this list originating from the pancreas.

✅ Answer: (B)

Question

Which hormone decreases blood glucose concentration?

(A) adrenaline
(B) glycogen
(C) insulin
(D) oestrogen
▶️ Answer/Explanation

Blood glucose levels are regulated via negative feedback by the pancreas. When blood sugar is high, the pancreas secretes insulin, which stimulates cells to take up glucose and signals the liver to convert excess glucose into stored glycogen. In contrast, adrenaline increases blood sugar for energy during stress, and glycogen is a storage polysaccharide, not a hormone. Oestrogen is primarily involved in the reproductive system. Therefore, insulin is the only hormone listed that functions to lower blood glucose concentration.

✅ Answer: (C)

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