IB Ventilatory/Circulatory quiz

What is the main role of hemoglobin during exercise?

• To transport ATP to the muscles

• To transport the excess hydrogen ions produced by the muscles

• To carry oxygen to the muscle tissues

• To change the pH of the blood

Which valve is located between the right atrium and the right ventricle?

• Bicuspid valve

• Pulmonary valve

• Tricuspid valve

• Aortic valve

Which component of blood is required to form a blood clot?

• Plasma

• Platelets

• Erythrocytes

• Leucocytes

Which of the following is responsible for the electrical impulse that regulates the contraction of the atria in the heart?

• Atrio-ventricular node

• Purkinje tissue

• Bundle of His

• Sinoatrial node

Which most likely results from participation in an aerobic training program?

• Increased left ventricular volume

• Decreased plasma volume

• Increased resting heart rate

• Decreased cardiac output

Which of the following is NOT a function of the pulmonary system?

• Ventilation

• Diffusion

• Gas Exchange

• Blood Transport

Red blood cells are called:

• Leukocytes

• Platelets

• Erythrocytes

• Plasma

White blood cells are called:

• Leukocytes

•   Platelets

• Erythrocytes

• Plasma

What is the smallest division of the circulatory system?

• Capillaries

• Veins

• Venuoles

• Arterioles

The main chemical regulator of breathing is:

• Carbon dioxide

• Carbon monoxide

• Oxygen

• Lactic acid