Question

Which of the following is the term for tightly packed sheets of cells that cover organs and outer surfaces?

		Epithelial tissue
		Connective tissue
		Muscle tissue
		Nervous tissue

Which of the following is the body's first line of defense against infection?

		Skin and mucous membranes
		Phagocytes and macrophages
		Lymphocytes
		Cell-mediated immunity

Which of the following does NOT contain epithelial tissue?

		Blood vessels
		Digestive tract
		Skull
		Heart

How many pints of blood are in an average adult human body?

		10
		11
		12
		13

DPT vaccinations protect against which type of infections?

		Bacterial
		Viral
		Parasites
		Malaria

Answer 1

1. Organs and the outer surfaces are covered by tightly packed cells of epithelial tissue.

Hence option (epithelial tissue) is correct.

2. The first line of defence in our body against infection include skin and mucous membranes. Cell mediated immunity and lymphocytes are a part of second line defence system.

Hence option (skin and mucous membranes) is correct.

3. Epithelial tissue covers the heart, digestive tract and blood vessels. It is absent in skull.

Hence option (skull) is correct.

4. Average adult human body has around 10.5 points of blood but it varies with height and other physical features.

Hence option (11) is correct.

5. Deptheria, pertussis and tetnus are all bacterial diseases caused by bacteria.

Hence option ( bacterial) is correct.