oxygen poor blood enters which chamber of the heart?

• Right Atrium

• Left Atrium

• Right Ventricle

• Left Ventricle

Which of the following is NOT true about capillaries?

• They are the site of gas, nutrient, and waste exchange between the blood and body cavity

• They are one cell layer wide

• Blood flows into them is controlled by sphincters

• They have valves to prevent blood from flowing backwards in them

Blood circulates between the heart and the body through the:

• cardiac circuit

• pulmonary circuit

• systemic circuit

• coronary circuit

_________________ arteries are important to providing the heart muscle cells with oxygen and nutrients.

• Cardiac

• Coronary

• Pulmonary

• Pericardial

What part of the blood contains minerals, vitamins, hormones, sugars and other nutrients being carried to the body's cells.

• Plasma

• Platelets

• Red blood cells

• White blood cells

Which of the following is NOT true for white blood cells?

• They are capable of fighting infection

• They are smaller than red blood cells

• They are produced in bone marrow

• They have a nucleus

Which blood cell engulfs microbes to digest and break them down?

• Lymphocytes

• Macrophages

• Platelets

• Red blood cells

Which component of blood plays a key role in blood clotting?

• Red blood cells

• White blood cells

• Platelets

• Plasma

Systolic pressure is associated with which heart event?

• Atria contract

• Atria relax

• Ventricles contract

• Ventricles relax

The 'dub' of the 'lub-dub' sound the heart makes is caused by:

• closing of the AV valves (bicuspid and mitral)

• closing of the semi-lunar valves

• the sound of blood rushing into the atria

• the sound of blood rushing into the ventricles