Understanding the Cardio-Respiratory System

What is cardiovascular fitness primarily concerned with?

• Flexibility of muscles

• Efficiency of the heart and lungs

• Strength of bones

• Speed of reflexes

Which of the following is a primary function of the respiratory system?

• Circulating blood

• Digesting food

• Exchanging gases

• Producing hormones

How does regular exercise affect the heart?

• Increases heart size

• Decreases heart rate at rest

• Weakens heart muscles

• Increases blood pressure

What is the main function of the lungs?

• Pumping blood

• Filtering waste

• Oxygenating blood

• Producing insulin

Which of the following best describes blood pressure?

• The rate at which blood is pumped

• The force of blood against artery walls

• The volume of blood in the body

• The temperature of the blood

What is the typical effect of exercise on breathing rate?

• Decreases it

• Increases it

• No change

• Stops it

Which blood vessels carry blood away from the heart?

• Veins

• Arteries

• Capillaries

• Venules

What is the average resting heart rate for a healthy adult?

• 30-40 beats per minute

• 60-100 beats per minute

• 120-140 beats per minute

• 150-180 beats per minute

Which component of the blood is primarily responsible for carrying oxygen?

• White blood cells

• Platelets

• Plasma

• Red blood cells

What is the primary muscle involved in the process of breathing?

• Biceps

• Diaphragm

• Quadriceps

• Trapezius