Section 4: Blood and Immunity

Question 1

Plasma

Answer 1

Colorless fluid part of blood, lymph, or milk

Question 2

Red Blood Cells

Answer 2

carry oxygen from the lungs and deliver it throughout the body

Question 3

Virus

Answer 3

an infective agent that typically consists of a nucleic acid molecule

Question 4

Swelling

Answer 4

any abnormal enlargement of a body part

Question 5

Threshold Potential

Answer 5

Level to which membrane potential must be depolarized to initiate an action potential

Question 6

Action Potential

Answer 6

occurs when the membrane potential of a specific cell rapidly rises and falls

Question 7

Presynaptic Neuron

Answer 7

transmits the signal toward a synapse

Question 8

Anemia

Answer 8

a condition marked by a deficiency of red blood cells or the hemoglobin in the blood.

Question 9

Bacteria

Answer 9

a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus.

Question 10

self antigens

Answer 10

receptors on the surface of cells