Exam Qs - Ch 3 - Circulatory System

What is the function of valves in the heart?

• Regulates blood flow

• Allows blood to flow in any direction

• Prevents blood from flowing backwards

• Controls the heart rate

Identify two types of blood vessels.

• Arteries and Capillaries

• Arteries and Lymphatic vessels

• Veins and Capillaries

• Arteries and Veins

What is the function of white blood cells?

• Producing insulin

• Defending against pathogens

• Transporting oxygen

• Regulating body temperature

What is the unit for cardiac output?

• Beats per minute

• Pounds per square inch

• Milliliters per minute

• Liters per minute

Describe one function of capillaries.

• Enabling gaseous exchange

• Pumping blood to the body

• Regulating blood pressure

• Producing red blood cells

What is the structure of capillaries?

• Thick muscular walls

• Two cell thick walls

• One cell thick walls

• No walls

What is the function of the left ventricle?

• Prevents backflow of blood

• Allows blood to flow in any direction

• Receives deoxygenated blood

• Forces blood off to the body

State two characteristics of veins.

• Carry deoxygenated blood, have narrow lumen

• Carry blood towards the heart, have thick walls

• Carry blood away from the heart, contain valves

• Carry oxygenated blood, have thin walls

What is the function of structure B in the heart?

• Prevents backflow of blood

• Forces blood off to the body

• Receives deoxygenated blood

• Allows blood to flow in any direction

Describe two structural differences between arteries and veins.

• Arteries have thin walls, veins have valves

• Arteries have valves, veins have narrow lumen

• Arteries have thicker walls, veins have narrow lumen

• Arteries have wider lumen, veins have thick walls