Circulatory Quiz

How can the circulatory system promote heat retention/conservation, such as on a cold day?

• Decreasing tunica media contraction

• Increasing capillary surface area

• Vasodilation

• Vasoconstriction

Tags

NGSS.HS-LS1-3

Which heart valves are NOT actively closed by the contraction of muscular structures?

• Mitral valves

• Semilunar valves

• Atrioventricular valves

• Tricuspid valves

In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?

• Mitral is closed, tricuspid is open

• Mitral is open, tricuspid is closed

• Both are open

• Both are closed

At the instant following the second heart sound, which heart valves are open?

• Both atrioventricular valves and semilunar valves

• Semilunar valves only

• Atrioventricular valves only

• All valves are closed

A given arteriole has a resistance of 2. What would the new resistance of this vessel be if its radius were to double?

• 1

• 1/16

• ⅛

• 4

What physical feature of large systemic arteries (resistance vessels) makes them relatively more responsive to changes in intracellular calcium concentrations?

• Absent tunica intima

• Thick tunica media

• Absent tunica media

• Thick tunica intima

What layer of the heart would be most immediately susceptible to infections caused by bacteria circulating in the blood?

• Epicardium

• Myocardium

• Pericardium

• Endocardium

What vessels carry deoxygenated blood away from the heart?

• • Pulmonary artery only

• Coronary arteries only

• Neither coronary arteries or pulmonary artery

• Both coronary arteries and pulmonary artery

What is the purpose of the Circulatory System?

• To digest the food you have eaten in order to nourish your body with the nutrients needed for survival.

• To react to external stimuli.

• To transport blood to all parts of the body so that gases, nutrients, and waste are transported to and from the cells.

• To send electrical impulses throughout the body.

Tags

NGSS.MS-LS1-3

Organs responsible for carrying oxygenated blood throughout the body ______________.

• Veins

• Arteries

• Intestines

• Capillaries