Column I | Column II | ||
a. | Gap junctions | (i) | Help in stopping substances from leaking across a tissue |
b. | Adhering junctions | (ii) | Keep neighbouring cells attached to each other |
c. | Tight junctions | (iii) | Connect the cytoplasm of adjoining cells |
(iv) | Facilitate communication between cells |
Assertion (A): | Mast cells in the human body release excessive amounts if inflammatory chemical which cause allergic reactions. |
Reason (R): | Allergens on reaching the human body stimulate mast cell in certain individuals. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
3. | (A) is true, but (R)) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | Tendon is universally found in all the bone joints. |
Reason (R): | Tendons connect bone joints. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
3. | (A) is true, but (R)) is false. |
4. | Both (A) and (R) are false. |
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Urinary bladder is lined by transitional epithelium. |
Reason (R): | Transitional epithelium always keeps the bladder volume constant. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
3. | (A) is true, but (R)) is false. |
4. | Both (A) and (R) are false. |