Anatomy and Physiology

Biology

Quiz 13 :

The Cardiovascular System: Blood Vessels and Circulation

Quiz 13 :

The Cardiovascular System: Blood Vessels and Circulation

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Explain the role of aldosterone and ADH in long-term restoration of blood volume.
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Aldosterone and ADH are both hormones that regulate the flow and volume of blood within the body. Both of these hormones promote fluid retention and reabsorption at the kidneys when there is a drop in blood pressure. This function prevents further loss of blood and promotes intake of fluid by stimulating thirst. As a result, ADH and aldosterone play a key role in regulating the body following hemorrhaging to restore the proper level of blood.

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What effect would the vasoconstriction of the renal artery have on blood pressure and blood volume?
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Vasoconstriction of the renal artery would promote an increase in systemic blood pressure and volume. Vasoconstriction leads to a loss of blood pressure to the kidney, since there is less space in the arteries to sustain blood flow. This triggers the release of the enzyme renin. Renin causes the release of angiotensin II, which is a hormone that stimulates cardiac output and elevates systemic blood pressure.

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A cross section of tissue shows several small, thin-walled vessels with very little smooth muscle tissue in the tunica media. Which type of vessels are these?
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A cross-section of tissue with small, thin-walled vessels with little smooth muscle tissue would show veins. Veins have thin walls, as they do not accumulate much pressure. The tunica media of an artery has more smooth muscle tissue than that of a vein. Thus, these blood vessels must be veins, as arteries tend to have thicker walls and more smooth muscle tissue than veins to support their function.

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Identify the three general functional patterns of the body's blood vessels.
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Describe the actions of vasodilators and vasoconstrictors.
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How would applying slight pressure to the common carotid artery affect your heart rate?
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Name the blood vessels that enter and exit the lungs, and note whether they contain primarily oxygenated or deoxygenated blood.
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Blood vessels that carry blood away from the heart are called a) veins. B) arterioles. C) venules. D) arteries.
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Why does blood pressure increase during exercise?
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While standing in the hot sun, Sally begins to feel light-headed and then faints. Explain what happened.
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What effect would relaxation of precapillary sphincters have on blood flow through a tissue?
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Match each item in column A with the most closely related item in column B. Place letters for answers in the spaces provided. img
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List the five general classes of blood vessels.
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In a healthy person, where is blood pressure greater: at the aorta or at the inferior vena cava? Explain.
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Identify the factors that contribute to total peripheral resistance.
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The layer of the arteriole wall that provides the properties of contractility and elasticity is the a) tunica adventitia. B) tunica media. C) tunica intima. D) tunica externa.
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Identify the major arteries in the following diagram. img a) __________ b) __________ c) __________ d) __________ e) __________ f) __________ g) __________ h) __________ i) __________
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Identify the two circuits of the cardiovascular system.
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Why are valves found in veins, but not in arteries?
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Name the immediate and long-term problems related to the cardiovascular response to hemorrhaging.
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