Blood and Microscopes

1. What is blood primarily composed of?

• Water and food particles

• Blood cells and plasma

• Vitamins and electrolytes

• A mix of water, vitamins, and electrolytes

What percentage of blood volume do blood cells make up?

• 92%

• 7%

• 55%

• 45%

What percentage of blood volume do blood plasma make up?

• 92%

• 7%

• 55%

• 45%

What is the main component of blood plasma?

• Food particles

• Blood cells

• Water

• Electrolytes

What is one of the primary functions of blood plasma?

• Transporting oxygen

• Fighting illness

• Transporting nutrients

• Clotting blood

What happens when blood sits still for a while?

• The plasma and blood cells mix evenly

• The blood cells rise to the top

• The plasma rises to the top and the blood cells settle to the bottom

• Nothing, blood does not separate

Which of the following is NOT a component of blood?

• Plasma

• White blood cells

• Red blood cells

• Saliva

What is the thin, flat piece of glass that holds the specimen?

• Coverslip

• Slide

• Stage

• Lens

When focusing a specimen, you should always start with the objective lens with the:

• Highest magnification

• Lowest magnification

• Medium magnification

• Any magnification

If the eyepiece magnifies 10x and the objective lens magnifies 40x, what is the total magnification?

• 50x

• 4x

• 400x

• 10x