The type of WBC that is the first to respond to bacterial infection and performs phagocytosis is: MCQ with Answer and Explanation

Explanation:
A neuron consists of a cell body (soma), dendrites, and an axon. Dendrites are short, branched processes that receive impulses and conduct them towards the cell body. The axon is a long, single, cylindrical fiber that conducts nerve impulses away from the cell body to other neurons, muscles, or glands. The myelin sheath is an insulating layer around the axon.

Explanation:
Vitamin D (cholecalciferol) is unique as it can be synthesized in the skin from 7-dehydrocholesterol in the presence of UV-B radiation. It acts as a hormone to regulate calcium and phosphate homeostasis. It must be activated in the liver and kidneys. It is also obtained from dietary sources like fatty fish, egg yolk. Deficiency causes rickets/osteomalacia.

Explanation:
The uterus (womb) is a muscular organ where the fertilized egg implants in the thickened endometrium and develops into a fetus during pregnancy. The ovaries produce eggs, the fallopian tubes are the site of fertilization, and the vagina is the birth canal. The endometrium is shed during menstruation if no pregnancy occurs.