Formative Practice 12.7 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
State the factors that cause a person to contract diabetes insipidus.

The posterior lobe of the individual’s pituitary gland failed to secrete antidiuretic hormone (ADH).

Question 2:
State two symptoms experienced by people with diabetes mellitus.

Blurred vision and wounds take longer time to heal

Question 3:
Goitre is a disease that causes the enlargement of the thyroid gland. In your opinion, why are goitre patients encouraged to eat seafood?

Goitre happens due to the failure of thyroid gland to produce sufficient thyroxine. This may result from a lack of iodine since thyroxine contains iodine.
Seafood contains high iodine content. Therefore eating a lot of seafood may be able to increase the body’s iodine content

Question 4:
Suggest a treatment for children with stunted growth due to growth hormone deficiency.

The gene for human growth hormone was successfully inserted into Escherichia coli. This enables the mass production, isolation and purification of the hormone for commercial use. Stunted children can be injected with this growth hormone.

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