Question 1

Which of the following includes lymphocytes?

Accepted Answer

A)  Red blood cells 
B)  Platelets 
C)  White blood cells 
D)  Albumin

Question 2

A three- chambered heart

Accepted Answer

A)  has three ventricles. 
B)  has two atria and one ventricle. 
C)  has three atria. 
D)  has one atrium and two ventricles. 
E)  is found in fish.

Question 3

Based on this figure, which of the following is TRUE?

Accepted Answer

A)  Oxygenated and deoxygenated blood mix in the ventricle. 
B)  Oxygenated and deoxygenated blood mix in the atria. 
C)  Oxygenated and deoxygenated blood never mix. 
D)  Deoxygenated blood enters the body capillaries after being pumped from the heart.

Question 4

While sitting in front of the TV, the average person's heart rate is about 70 beats per minute because the nervous system slows the heart down from the approximately 100 beats per minute that the pacemaker, the node, sets.

Accepted Answer

The answer of While sitting in front of the TV,...

Question 5

Erythropoietin

Accepted Answer

A)  stimulates the spleen to release more red blood cells. 
B)  is produced by the pancreas. 
C)  is released in response to high carbon dioxide or low oxygen levels in the blood. 
D)  is released only in response to hemorrhaging (bleeding).

Question 6

The valve is between the right ventricle and the pulmonary artery.

Accepted Answer

A)  atrioventricular 
B)  tricuspid 
C)  semilunar 
D)  bicuspid

Question 7

It is important that the atrioventricular (AV) node produce a delay between the contraction of the atria and the contraction of the ventricles because this allows the

Accepted Answer

A)  heart to rest for a brief period of time. 
B)  ventricles to fill to capacity. 
C)  ventricles to contract in smooth synchrony. 
D)  atria to contract in smooth synchrony.

Question 8

Which of these blood cells have no nucleus in mammals?

Accepted Answer

A)  White blood cells 
B)  Red blood cells 
C)  Lymphocytes 
D)  All blood cells in mammals lack nuclei.

Question 9

The fluid portion of the blood is called .

Accepted Answer

The answer of The fluid portion of the blood is...

Question 10

Which of the following does NOT play a role in blood clotting?

Accepted Answer

A)  Albumin 
B)  Platelets 
C)  Thrombin 
D)  Fibrinogen 
E)  Fibrin

Question 11

Fluid that leaks (or is pushed out by pressure) from the capillaries into the tissue spaces is known as _ fluid.

Accepted Answer

The answer of Fluid that leaks (or is pushed out...

Question 12

Which blood constituent makes up most of the volume of blood?

Accepted Answer

A)  Plasma 
B)  Red blood cells 
C)  Blood proteins 
D)  White blood cells

Question 13

Hypertension may lead to

Accepted Answer

A)  atherosclerosis. 
B)  lung cancer. 
C)  low blood pressure. 
D)  enlarged prostate.

Question 14

How do lymphatic capillaries differ from blood capillaries?

Accepted Answer

A)  They contain plasma. 
B)  They have "dead ends." 
C)  They contain red blood cells. 
D)  They have a wall only one cell layer thick. 
E)  They are made by lymphocytes.

Question 15

When interstitial fluid enters the lymphatic system, it becomes known as

Accepted Answer

A)  plasma. 
B)  lymph. 
C)  macrophage. 
D)  globulin. 
E)  interstitial fluid.

Question 16

What is the correct sequence of blood vessels from the heart through the body and back to the heart?

Accepted Answer

A)  Veins, venules, capillaries, arterioles, arteries 
B)  Arteries, arterioles, capillaries, venules, veins 
C)  Veins, venules, arteries, arterioles, capillaries 
D)  Arterioles, arteries, capillaries, veins, venules 
E)  Arteries, arterioles, veins, venules, capillaries

Question 17

The head of a giraffe is 5 meters above its heart. Compared to humans, giraffes have

Accepted Answer

A)  less blood volume. 
B)  veins of smaller diameter. 
C)  lower systolic blood pressure. 
D)  higher systolic blood pressure.

Question 18

Children who are severely deficient in protein may develop swollen bodies (a condition called kwashiorkor) due to an accumulation of fluid in their tissues. Based on your knowledge of the role of albumin in the blood, explain how this might happen.

Accepted Answer

The answer of Children who are severely deficient in protein...

Question 19

The aorta

Accepted Answer

A)  connects the right and left ventricles of the heart. 
B)  is a major vein. 
C)  contains blood with low pressure. 
D)  is a major artery.

Question 20

Which of the following is delivered from the small intestine to the bloodstream through the lymphatic system?

Accepted Answer

A)  Amino acids 
B)  Carbohydrates (sugars) 
C)  Proteins 
D)  Lipids (fats)

Exam 33: Circulation