The structure that conducts nerve impulses away from the cell body is the: MCQ with Answer and Explanation

Explanation:
Calcium phosphate (hydroxyapatite) gives bones and teeth their hardness. Phosphorus is also a component of ATP, DNA, and cell membranes. Dairy products, meat, and nuts are good sources.

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.

Explanation:
Lutein and zeaxanthin are carotenoids concentrated in the macula lutea of the retina, filtering blue light and acting as antioxidants, protecting photoreceptors.