HS20 - Final Review - Unit 4 - Circulatory System

Which of the following is NOT one of the seven functions of the circulatory system?

• Transports nutrients

• Regulates temperature

• Produces hormones

• Forms clots to prevent blood loss

What is the main function of the heart in the circulatory system?

• To filter waste from the blood

• To pump blood throughout the body

• To produce red blood cells

• To absorb nutrients from food

Which chambers of the heart receive blood?

• Ventricles

• Atriums/Atria

• Valves

• Nodes

What is the purpose of valves in the heart?

• To produce hormones

• To keep the blood flowing in the right direction

• To absorb nutrients

• To regulate temperature

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

• Tricuspid valve

• Pulmonary valve

• Mitral valve

• Semilunar valve

Explain why the ventricles have larger muscles than the atriums.

• Because they need to pump blood a shorter distance

• Because they need to pump blood out of the heart to the body

• Because they receive blood from the body

• Because they regulate temperature

Describe the path of blood through the heart, starting from the body.

• Right Atrium → Right Ventricle → Lungs → Left Atrium → Left Ventricle → Body

• Left Atrium → Left Ventricle → Lungs → Right Atrium → Right Ventricle → Body

• Right Ventricle → Right Atrium → Lungs → Left Ventricle → Left Atrium → Body

• Left Ventricle → Left Atrium → Lungs → Right Ventricle → Right Atrium → Body

Which node sends an electric pulse to the atriums causing them to beat?

• Atrioventricular (AV) node

• Purkinje fibers

• Sinoatrial (SA) node

• Mitral valve

What is the role of the Purkinje fibers in the heart?

• To carry blood to the lungs

• To send an electrical pulse causing the ventricles to beat

• To regulate temperature

• To transport nutrients

Why must all cells be within 2 cells of a blood vessel?

• To receive hormones

• To allow diffusion of nutrients and waste over short distances

• To regulate temperature

• To form clots