Circulatory System and Cardiac Physiology

What are the three basic components of the circulatory system?

• Heart, Blood vessels, Blood

• Heart, Lungs, Blood

• Heart, Veins, Arteries

• Heart, Blood, Muscles

What is the function of the heart?

• To pump blood

• To filter blood

• To produce hormones

• To store nutrients

What are the two types of circulation in the body?

• Pulmonary and Systemic

• Oxygenated and Deoxygenated

• Arterial and Venous

• Capillary and Atrial

What prevents the backflow of blood in the heart?

• Heart valves

• Blood pressure

• Muscle contractions

• Blood viscosity

What is the role of the septum in the heart?

• Prevents mixture of blood

• Pumps blood

• Stores blood

• Regulates heart rate

What is the function of the atrioventricular (AV) valves?

• Prevent backflow of blood

• Allow blood to flow into arteries

• Regulate heart rate

• Control blood pressure

What is the primary composition of the heart wall?

• Cardiac muscle fibers

• Smooth muscle

• Epithelial tissue

• Connective tissue

What is the role of intercalated discs in cardiac muscle?

• Join cardiac cells together

• Separate atria and ventricles

• Control heart rate

• Store calcium

What is autorhythmicity in the heart?

• Self-generating action potentials

• Regulation by the nervous system

• Response to hormones

• Contraction strength variation

What is the pacemaker potential?

• Slow drift to threshold

• Rapid contraction

• Electrical impulse generation

• Resting potential maintenance