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Sophia - Human Biology - Unit 4 Challenge 2 1 — Cardiovascular System Understand the system of blood vessels. What vessels carry blood away from the heart? • a.) Veins • b.) Atria • c.) ... Arteries • d.) Venules 2 — Heart and Blood Flow Identify the major structures of the heart and the specific role in the overall functioning of the heart. Which of the following describes the atrium? • a.) The thick wall that divides the heart in half • b.) The upper chamber of each half of the heart • c.) The lower chamber of each half of the heart • d.) The valve that separates the upper and lower chambers of the right half of the heart 3 — Cardiac Cycle and Cardiac Conduction System Determine the components of the cardiac cycle. What is the role of the SA node in the heart? • a.) It causes the chambers of the heart to relax after a contraction. • b.) It produces two electric signals: First for the atria to contract and second for the ventricles to contract. • c.) It slows down the electric signal to the ventricles so they beat after the atria. • d.) It originates the electric signal that causes the heart to beat. 4 — Blood Pressure Understand how blood pressure is measured and regulated, as well as common disorders. What kind of blood pressure exists during a contraction of the ventricle? • a.) Hypertension • b.) Systolic • c.) Diastolic • d.) Hypotension 5 — Cardiovascular Health Identify various diseases and disorders of the cardiovascular system. What is a heart attack? • a.) When a weak spot in the walls of the heart bursts • b.) When high blood pressure exhausts the heart's ability to pump • c.) When the heart isn't able to get enough oxygen to function properly • d.) When buildup of plaque causes a blood clot in the heart [Show More]

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