Question

a) Placenta acts as an endocrine tissue. Justify (3)

b) Write the difference between menarche and meno pause. ? ​

Answer 1

Answer:

The placenta is a temporary endocrine organ formed during pregnancy, which produces hormones important in the maintenance of a healthy pregnancy and in preparation for labour and breastfeeding.

Explanation:

1. The placenta connects the developing fetus to the wall of the mother’s uterus during pregnancy. It grows in the wall of the uterus and is attached to the fetus within the uterine cavity by the umbilical cord. The placenta is formed by cells that originate from the fetus and is therefore the first of the fetal organs to develop.

Answer 2

Answer:

a) Placenta secretes hormones such as human chorionic gonadotrophic (hCG), estrogen, progesterone and human placental lactogen. So, placenta is regarded as an endocrine tissue.

b) Menarche is the starting stage, while menopause is the ending stage of the menstrual cycle in females. Menarche starts at the age of approximate 11-16 years, whereas menopause may occur between the age of 45 – 50 years.