Question 1

In what way is blood the body's liquid messenger?

Accepted Answer

blood delivers oxygen and nutrients to the body's cells

Answer

blood delivers electrical messages from the brain to the rest of the body

Answer

blood delivers chemical messages to the body's organs

Answer

blood carries nutrients from the stomach to the intestines

Question 2

If you wanted to see red blood cells being created, where would you look?

Accepted Answer

inside your bones

Answer

inside your lungs

Answer

inside your liver

Answer

inside your heart

Question 3

What can you infer about plasma from the fact that it's almost completely clear?

Accepted Answer

it's almost completely made of water

Answer

it contains a lot of oxygen

Answer

it cannot be found in the bloodstream

Answer

it helps fight infections

Question 4

What can you conclude about a red blood cell (erythrocyte) that's bright red in color?

Accepted Answer

it's full of oxygen

Answer

it is on its way to the lungs to pick up more oxygen

Answer

it is fighting a pathogen

Answer

it is helping your body heal a cut

Question 5

How does a red blood cell attach oxygen to itself?

Accepted Answer

with hemoglobin

Answer

with erythrocytes

Answer

with plasma

Answer

with platelets

Question 6

How do white blood cells compare to red blood cells?

Accepted Answer

white blood cells are bigger than red blood cells

Answer

there are more white blood cells than red blood cells

Answer

white blood cells contain more oxygen

Answer

white blood cells are smaller than red blood cells

Question 7

What is the main function of platelets?

Accepted Answer

helping your blood to clot

Answer

fighting invading germs

Answer

preventing your blood from coagulating

Answer

delivering oxygen to your body's cells

Question 8

How do some white blood cells fight invading germs?

Accepted Answer

they envelop (surround) them

Answer

they force them out of the bloodstream

Answer

they attach oxygen to them

Answer

they stun them with special chemicals

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