BioNotesEndocrine System - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of pituitary, thyroid, adrenal glands, and insulin.
Respiratory System - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of breathing mechanisms, respiratory volumes, and high-altitude adaptations.
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Online
Practice questions testing deep understanding of male and female reproductive anatomy and the menstrual cycle.
Q1. During a surgical procedure called a vasectomy, the vas deferens (sperm duct) in a male is cut and tied off. Will this procedure affect the man's ability to produce testosterone? Explain the biological reasoning.
Q2. Assertion (A): The menstrual cycle permanently stops when a woman becomes pregnant. Reason (R): During pregnancy, the developing embryo implants in the thickened uterine lining (endometrium). Hormones like progesterone are kept high to maintain this lining to support the fetus, so the lining is not shed as menstrual blood.
Q3. (From ICSE 2028 onwards) Assertion (A): A mother begins to lactate and produce milk only after childbirth, despite high prolactin levels during late pregnancy. Reason (R): During pregnancy, high levels of estrogen and progesterone from the placenta inhibit the action of prolactin on the breasts. Once the placenta is delivered after birth, estrogen and progesterone levels drop sharply, letting prolactin stimulate milk production.
Endocrine System - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of pituitary, thyroid, adrenal glands, and insulin.
Respiratory System - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of breathing mechanisms, respiratory volumes, and high-altitude adaptations.