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1. What is the function of white blood cells?
A. Carry oxygen
B. Fight infection
C. Form clots
D. Transport nutrients
Rationale: White blood cells (leukocytes) are the immune cells of the blood. They
destroy bacteria and other pathogens.
2. What is the function of red blood cells?
A. Fight infection
B. Form clots
C. Carry oxygen
D. Make up the liquid portion of blood
Rationale: Red blood cells contain hemoglobin, which binds oxygen in the lungs
and delivers it to the tissues.
3. What is plasma?
A. The cells that carry oxygen
B. The cells that form clots
,C. The cells that fight infection
D. The liquid portion of blood
Rationale: Plasma is the straw-colored fluid that carries blood cells, nutrients,
hormones, and waste products.
4. Which blood component forms blood clots?
A. Plasma
B. White blood cells
C. Platelets
D. Red blood cells
Rationale: Platelets gather at an injury site and stick together to stop bleeding.
5. The beat of the heart felt through the walls of the arteries is called the:
A. Blood pressure
B. Pulse
C. Respiration
D. Perfusion
Rationale: Each ventricular contraction sends a pressure wave through the arteries
that can be felt at sites such as the radial and carotid arteries.
6. Which of the following are part of standard precautions for the EMS provider?
A. Scene safety only
B. Body substance isolation (BSI) only
C. BSI and scene safety
D. Hand hygiene only
Rationale: The source pairs BSI with scene safety. Strictly speaking, standard
precautions are infection-control measures (gloves, eye protection, masks, and
, hand hygiene), while scene safety is a separate step in the scene size-up. EMT
courses usually teach the two together before patient contact.
7. A pathogen is:
A. A medication that fights disease
B. An organism that causes disease
C. A type of white blood cell
D. A protective barrier on the skin
Rationale: Pathogens include bacteria, viruses, fungi, and parasites. Standard
precautions protect providers from exposure to them.
8. A patient lying on their back is in which position?
A. Prone
B. Lateral recumbent
C. Supine
D. Fowler’s
Rationale: Supine means lying face up. A helpful memory aid is that a supine
patient could hold a bowl of soup on the chest.
9. A patient lying face down is in which position?
A. Supine
B. Prone
C. Recovery position
D. Trendelenburg
Rationale: Prone is face down, the opposite of supine.