The type of epithelial tissue that lines the urinary bladder and allows stretching is: MCQ with Answer and Explanation

Explanation:
Iodine deficiency leads to insufficient thyroid hormone production, causing TSH hypersecretion and thyroid gland enlargement (goiter). Anemia is iron/B₁₂/folate deficiency, rickets vitamin D, scurvy vitamin C.

Explanation:
The right lung has three lobes, the left has two (to accommodate the heart). So C is incorrect.

Explanation:
B-lymphocytes (B cells) differentiate into plasma cells that secrete antibodies, providing humoral immunity. T-lymphocytes (T cells) are responsible for cell-mediated immunity, directly attacking infected or cancerous cells. Vaccines are prophylactic; they stimulate the immune system to develop memory and prevent future infections, but they do not cure active, ongoing viral infections. Thus, statements 1 and 2 are correct.