What is the first line of defense in the immune system? MARK ALL THAT APPLY

• Skin

• Nails

• Mucous membranes

• Hair

A white blood cell that destroys pathogens by engulfing them and breaking them down is called:

• B-cell and Antibodies

• Phagocyte (Macrophage)

• T-Cells and WBC

• Antigens

An AB person can donate to who?

• All types
• AB blood type

• A and B blood type

• AB, A, and B blood type

What is a function of your lymph nodes? MARK ALL THAT APPLY

• Flush lymph to the heart

• Cleans lymph

• Creates Antibodies

• Destroy pathogens

What is the first step in the lifecycle of a RBC?

• Old RBC parts are recycled and reused

• Aged cells are broken down

• They circulate in the bloodstream

• They are formed in the bone marrow

What materials does blood transport? (MARK ALL THAT APPLY)

• O₂

• CO₂

• Nutrients

• Hormones

When you get a cut your body first constricts its blood vessels. What is the next step in blood clotting?

• A platelet plug is formed

• Vasoconstriction

• Coagulation

• fibrin proteins form a mesh-like clot

If a doctor is unsure of your blood type they will give you O blood. Why?

• O blood cannot be given to anyone unless they also have O type blood

• O blood can be given to anyone since they aren't anti-A or anti-B

• O blood can be given to anyone since they have a lot of antibodies to protect the body

• O blood can be given to anyone since they have no antigens on them so your body won't attack the blood