Question

Thyroid cartilage of larynx enlarges in humans under the influence of:

• A. Testosterone
• B. Thyroxine
• C. Triiodothyronine
• D. Thyrocalcitonin

Answer 1

The correct option is A Testosterone

Puberty is the onset of the reproductive phase in humans where they become capable of reproduction. It is characterised by distinct morphological, behavioral and anatomical changes in males and females. Enlargement of the larynx is one such change observed in males.
The larynx is also known as the voice box. It is situated in the neck region and helps breathe, produce sound, and protect the trachea against food aspiration.
The larynx is made up of thyroid cartilage, a type of hyaline cartilage which is found in front of the larynx and above the thyroid gland. Cartilages are connective tissues with a semi-rigid matrix.
Thyroid cartilage enlarges under the influence male sex hormone testosterone in males.
Thyroxine and triiodothyronine are thyroid hormones involved in regulation of basal metabolism of the body.
Thyrocalcitonin is a thyroid hormone involved in the regulation of Ca${}^{2+}$ ions in the blood.