Question 1

In humans, blood is pumped from the heart to the lungs and back through the _______ circuit.

Accepted Answer

The answer of In humans, blood is pumped from the...

Question 2

As you work hard to answer these questions, your brain deoxygenates blood, and vessels carry it back to your heart.Part of the path followed by that deoxygenated blood is through the

Accepted Answer

A)  inferior vena cava to the right atrium to the right ventricle to the lungs. 
B)  superior vena cava to the left atrium to the left ventricle to the lungs. 
C)  superior vena cava to the right atrium to the right ventricle to the lungs. 
D)  aorta to the right atrium and the right ventricle to the body with new O2. 
E)  pulmonary artery to the lungs to the right atrium to the right ventricle. 
A)  inferior vena cava to the right atrium to the right ventricle to the lungs. 
B)  superior vena cava to the left atrium to the left ventricle to the lungs. 
C)  superior vena cava to the right atrium to the right ventricle to the lungs. 
D)  aorta to the right atrium and the right ventricle to the body with new O2. 
E)  pulmonary artery to the lungs to the right atrium to the right ventricle.

Question 3

Hemolymph that leaves vessels and percolates through tissues is found in

Accepted Answer

A)  vertebrate circulatory systems. 
B)  the human heart. 
C)  open circulatory systems. 
D)  closed circulatory systems. 
E)  the lymphatic system of vertebrates. 
A)  vertebrate circulatory systems. 
B)  the human heart. 
C)  open circulatory systems. 
D)  closed circulatory systems. 
E)  the lymphatic system of vertebrates.

Question 4

Arteries are vessels that carry blood away from the heart, whereas _______ are vessels that carry blood back to the heart.

Accepted Answer

The answer of Arteries are vessels that carry blood away...

Question 5

Which statement about circulatory systems is false?

Accepted Answer

A)  In closed circulatory systems, "extracellular fluid" refers to the fluid inside and outside the circulatory system. 
B)  Hearts move extracellular fluid through the body. 
C)  In closed circulatory systems, the fluid inside the circulatory system is blood plasma. 
D)  Hemolymph remains in the vessels of open circulatory systems. 
E)  In closed circulatory systems, interstitial fluid is outside the circulatory system. 
A)  In closed circulatory systems, "extracellular fluid" refers to the fluid inside and outside the circulatory system. 
B)  Hearts move extracellular fluid through the body. 
C)  In closed circulatory systems, the fluid inside the circulatory system is blood plasma. 
D)  Hemolymph remains in the vessels of open circulatory systems. 
E)  In closed circulatory systems, interstitial fluid is outside the circulatory system.

Question 6

In humans, contraction of the right ventricle pumps blood directly into the _______ artery.

Accepted Answer

The answer of In humans, contraction of the right ventricle...

Question 7

Which of the following about closed circulatory systems is false?

Accepted Answer

A)  Some components of blood normally always stay within the vessels. 
B)  They are found in vertebrates. 
C)  They provide a more rapid transport of substances than is possible with open circulatory systems. 
D)  There is no distinction between blood and interstitial fluid. 
E)  They allow blood flow to be matched to the needs of tissues. 
A)  Some components of blood normally always stay within the vessels. 
B)  They are found in vertebrates. 
C)  They provide a more rapid transport of substances than is possible with open circulatory systems. 
D)  There is no distinction between blood and interstitial fluid. 
E)  They allow blood flow to be matched to the needs of tissues.

Question 8

Which statement about African lungfishes is false?

Accepted Answer

A)  African lungfishes can exchange respiratory gases with either water or air. 
B)  Modifications of the lungfish circulatory system set the stage for the evolution of separate pulmonary and systemic circuits. 
C)  Some gill arches retain gill filaments for gas exchange while others do not. 
D)  The dorsal aorta can receive blood high in oxygen from either the lungs or gill filaments. 
E)  The heart of the African lungfish has a partially divided ventricle. 
A)  African lungfishes can exchange respiratory gases with either water or air. 
B)  Modifications of the lungfish circulatory system set the stage for the evolution of separate pulmonary and systemic circuits. 
C)  Some gill arches retain gill filaments for gas exchange while others do not. 
D)  The dorsal aorta can receive blood high in oxygen from either the lungs or gill filaments. 
E)  The heart of the African lungfish has a partially divided ventricle.

Question 9

Refer to the figure, which shows the human heart.   Name the valve located between structures 6 and 9, and name structures 6 and 9.

Accepted Answer

The bicuspid, or mitral, valve

Question 10

Refer to the figure, which shows the human heart.   Which structure in the diagram is mostly responsible for conducting the action potential from the atria to the ventricles? Provide name and number.

Accepted Answer

Structure 3, the atrioventricu

Question 11

Arthropods, mollusks, and some other invertebrates have a(n) _______ circulatory system.

Accepted Answer

The answer of Arthropods, mollusks, and some other invertebrates have...

Question 12

Falling arterial pressure would prompt all the following except

Accepted Answer

A)  release of renin by the kidneys. 
B)  autoregulatory widening of vessels. 
C)  decreased firing of stretch sensors in arteries. 
D)  release of antidiuretic hormone (ADH) from the pituitary gland. 
E)  inhibition of sympathetic output to arteries and arterioles. 
A)  release of renin by the kidneys. 
B)  autoregulatory widening of vessels. 
C)  decreased firing of stretch sensors in arteries. 
D)  release of antidiuretic hormone (ADH) from the pituitary gland. 
E)  inhibition of sympathetic output to arteries and arterioles.

Exam 49: Circulatory Systems

In humans, blood is pumped from the heart to the lungs and back through the _______ circuit.

As you work hard to answer these questions, your brain deoxygenates blood, and vessels carry it back to your heart.Part of the path followed by that deoxygenated blood is through the

Hemolymph that leaves vessels and percolates through tissues is found in

Arteries are vessels that carry blood away from the heart, whereas _______ are vessels that carry blood back to the heart.

Which statement about circulatory systems is false?

In humans, contraction of the right ventricle pumps blood directly into the _______ artery.

Which of the following about closed circulatory systems is false?

Which statement about African lungfishes is false?

Refer to the figure, which shows the human heart. Name the valve located between structures 6 and 9, and name structures 6 and 9.

Refer to the figure, which shows the human heart. Which structure in the diagram is mostly responsible for conducting the action potential from the atria to the ventricles? Provide name and number.

Arthropods, mollusks, and some other invertebrates have a(n) _______ circulatory system.

Falling arterial pressure would prompt all the following except

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