Differentiate between the following pairs on the basis of what is indicated in the brackets:
Testosterone and Oestrogen (organ which secretes)
Topic: Testosterone and oestrogen
Answer
TESTOSTERONE is secreted by the TESTIS — specifically the LEYDIG (interstitial) cells.
OESTROGEN is secreted by the OVARY — by the Graafian follicle.
The brackets restrict the answer to the ORGAN, so name it — but adding the specific CELLS costs three words and shows precision.
Both are SEX HORMONES and both produce the SECONDARY SEXUAL CHARACTERISTICS at puberty: TESTOSTERONE — facial and body hair, deepening of the voice (enlarged larynx), broad shoulders, muscular development OESTROGEN — widening of the hips, development of the breasts, and the repair of the uterine lining after menstruation
The testis and ovary are therefore BOTH gamete-producing organs AND endocrine glands — which is what links the reproductive chapter to the endocrine one.
| Point of difference | Testosterone | Oestrogen |
|---|---|---|
| Organ secreting | Testis (Leydig cells) | Ovary (Graafian follicle) |
| Sex | Male | Female |
| Controls | Male secondary sexual characteristics | Female secondary sexual characteristics |