BIO 272 Heart and Blood Vessels Unit Exam Questions and Answers

BIO 272: Heart and Blood Vessels Unit
Exam Questions and Answers

Supplies blood to the heart muscle cells: - Correct Answers -Coronary circulation

Arteries carry deoxygenated blood and veins carry oxygenated blood: - Correct
Answers -Pulmonary circulation

Arteries carry oxygenated blood and veins carry deoxygenated blood: - Correct
Answers -Systemic circulation

What carries blood away from the heart? - Correct Answers -arteries

What carries blood toward the heart? - Correct Answers -veins

The area of the thoracic cavity that holds the heart: - Correct Answers –Mediastinum

When chemoreceptors detect low O2 or high CO2, what happens in the viscera? -
Correct Answers -Vasoconstriction

When chemoreceptors detect low O2 or high CO2, what happens to the blood
pressure? - Correct Answers -The blood pressure increases

How does epinephrine affect the body? - Correct Answers -Increases heart rate,
vasoconstriction in the viscera, vasodilation in the skeletal muscle

How does epinephrine affect the blood pressure? - Correct Answers -It increases the
blood pressure

Which organ releases epinephrine? - Correct Answers -The adrenal gland

When is epinephrine released? - Correct Answers -To prepare the body for sudden
activity

What lines the inside of the heart allowing for smooth blood flow and preventing blood
clots? (serous membrane- simple squamous epithelium held in place by areolar
connective tissue) - Correct Answers -The endocardium

Which layer is made of dense irregular tissue and functions to protect and hold the heart
in place? - Correct Answers -The fibrous pericardium

, What layer makes up the thickest part of the heart wall? (made of cardiac muscle and
capillaries) - Correct Answers -The Myocardium

Which layer is attached to the inside of the fibrous pericardium? (serous membrane-
simple squamous epithelium held in place by areolar connective tissue) - Correct
Answers -The parietal pericardium

Fluid filled space between the parietal pericardium and visceral pericardium that allows
for smooth movement of the heart: - Correct Answers -The pericardial cavity

Which layer is attached to the surface of the heart? (serous membrane- simple
squamous epithelium held in place by areolar connective tissue) - Correct Answers -The
visceral pericardium/epicardium

The valves are closed when the heart is relaxed and the valves are open when the
heart contracts: - Correct Answers -Semilunar valves

Valves are between the ventricles and the arteries: - Correct Answers -Semilunar valves

Which valves are examples of semilunar valves? - Correct Answers -The aortic valve
and the pulmonary valve

The valves are open when the heart is relaxed and the valves are closed when the
heart contracts: - Correct Answers -AV valves

These valves are found between the atria and the ventricles: - Correct Answers -AV
valves

In what valves are the cusps connected to the papillary muscles by chordae tendineae?
- Correct Answers -The AV valves

Which valves are examples of AV valves? - Correct Answers -The biscuspid and
tricuspid valves

Supplies blood to the front of the heart: - Correct Answers -Left coronary artery

What are the branches of the left coronary artery? - Correct Answers -circumflex artery
and anterior interventricular artery

Supplies blood to the back of the heart: - Correct Answers -Right coronary artery

What are the branches of the right coronary artery? - Correct Answers -The marginal
artery and posterior interventricular artery

Collects blood from cardiac veins and empties into the right atrium: - Correct Answers -
Cardiac sinus