Question 1

What is true about the lymphatic system?

Accepted Answer

A) Fluid moves through the lymphatic system under high pressure. 
B) It collects fluid that seeps into the tissues and returns it to the blood. 
C) It is bidirectional. 
D) It exhibits peristaltic contractions. 
E) It carries all absorbed materials from the stomach and intestines to the liver. 
A) Fluid moves through the lymphatic system under high pressure. 
B) It collects fluid that seeps into the tissues and returns it to the blood. 
C) It is bidirectional. 
D) It exhibits peristaltic contractions. 
E) It carries all absorbed materials from the stomach and intestines to the liver.

Question 2

Why is an open circulatory system less efficient than a closed circulatory system?

Accepted Answer

A) It is more difficult to quickly deliver O2 to specific tissues when needed with an open circulatory system. 
B) There is no heart to pump the blood in an open circulatory system. 
C) Open circulatory systems lack respiratory pigments that bind to oxygen. 
D) Metabolic wastes cannot be removed from tissues in an open circulatory system. 
E) Blood cannot be used to transport nutrients in an open circulatory system. 
A) It is more difficult to quickly deliver O2 to specific tissues when needed with an open circulatory system. 
B) There is no heart to pump the blood in an open circulatory system. 
C) Open circulatory systems lack respiratory pigments that bind to oxygen. 
D) Metabolic wastes cannot be removed from tissues in an open circulatory system. 
E) Blood cannot be used to transport nutrients in an open circulatory system.

Question 3

Changes in the arterial blood pressure are detected by ________ located in the walls of the carotid artery and the arch of the aorta.

Accepted Answer

A) baroreceptors 
B) pacemakers 
C) Purkinje fibers 
D) bundle branches 
E) osmoreceptors 
A) baroreceptors 
B) pacemakers 
C) Purkinje fibers 
D) bundle branches 
E) osmoreceptors

Question 4

In the blood clotting cascade mechanism,which specific enzyme catalyzes the conversion of fibrinogen to fibrin?

Accepted Answer

A) albumin 
B) renin 
C) catalase 
D) angiotensin 
E) thrombin 
A) albumin 
B) renin 
C) catalase 
D) angiotensin 
E) thrombin

Question 5

When submerged,frogs receive most of their O2 from capillaries within the skin.What structure would contain blood with the highest O2 concentration in a submerged frog,which is not able to breathe using its lungs?

Accepted Answer

A) left atrium 
B) right atrium 
C) aorta 
D) ventricle 
E) pulmonary vein 
A) left atrium 
B) right atrium 
C) aorta 
D) ventricle 
E) pulmonary vein

Question 6

A nurse takes your blood pressure during your annual examination,and she enters a reading of 115/70 in your medical chart.These numbers mean that the

Accepted Answer

A) pressure in your brachial artery during ventricular contraction is 115,while the pressure during ventricular relaxation is 70. 
B) pressure in your brachial artery during ventricular contraction is 115 while the pressure during atrial contraction is 70. 
C) nurse heard sounds through the stethoscope only when the pressure in your brachial artery was exactly 115 and again when it was exactly 70. 
D) pressure in the ventricles of the heart is 115 when the ventricles are contracting and 70 when the ventricles are relaxing. 
E) diastolic pressure is 115 and the systolic pressure is 70. 
A) pressure in your brachial artery during ventricular contraction is 115,while the pressure during ventricular relaxation is 70. 
B) pressure in your brachial artery during ventricular contraction is 115 while the pressure during atrial contraction is 70. 
C) nurse heard sounds through the stethoscope only when the pressure in your brachial artery was exactly 115 and again when it was exactly 70. 
D) pressure in the ventricles of the heart is 115 when the ventricles are contracting and 70 when the ventricles are relaxing. 
E) diastolic pressure is 115 and the systolic pressure is 70.

Question 7

A friend asks you to explain the difference between atherosclerosis and arteriosclerosis.You say,"Well

Accepted Answer

A) atherosclerosis is a condition that results from too much calcium being deposited in the arteries,while arteriosclerosis results from the accumulation of cholesterol deposits in the arteries." 
B) atherosclerosis is a condition that results from having angina pectoris occurring in the arteries of the heart,while arteriosclerosis results from the accumulation of cholesterol deposits in the arteries." 
C) atherosclerosis is a condition that results from too much calcium being deposited in the arteries,while arteriosclerosis results from having angina pectoris occurring in the arteries of the heart." 
D) atherosclerosis is a condition that results from the accumulation of cholesterol deposits in the arteries,while arteriosclerosis results from too much calcium being deposited in the arteries." 
E) atherosclerosis and arteriosclerosis are nearly the same and usually occur after a stroke." 
A) atherosclerosis is a condition that results from too much calcium being deposited in the arteries,while arteriosclerosis results from the accumulation of cholesterol deposits in the arteries." 
B) atherosclerosis is a condition that results from having angina pectoris occurring in the arteries of the heart,while arteriosclerosis results from the accumulation of cholesterol deposits in the arteries." 
C) atherosclerosis is a condition that results from too much calcium being deposited in the arteries,while arteriosclerosis results from having angina pectoris occurring in the arteries of the heart." 
D) atherosclerosis is a condition that results from the accumulation of cholesterol deposits in the arteries,while arteriosclerosis results from too much calcium being deposited in the arteries." 
E) atherosclerosis and arteriosclerosis are nearly the same and usually occur after a stroke."

Question 8

Which secreted molecule is LEAST likely to effect a significant change in blood pressure?

Accepted Answer

A) antidiuretic hormone 
B) aldosterone 
C) atrial natriuretic hormone 
D) high-density lipoprotein 
E) nitric oxide 
A) antidiuretic hormone 
B) aldosterone 
C) atrial natriuretic hormone 
D) high-density lipoprotein 
E) nitric oxide

Question 9

Leukocytes (white blood cells)account for about ________ of the cells in human blood.

Accepted Answer

A) 0)1% 
B) 1% 
C) 10% 
D) 60% 
A) 0)1% 
B) 1% 
C) 10% 
D) 60%

Question 10

The liquid portion of blood that contains metabolites,wastes,hormones,ions,and a variety of proteins is called the ________.

Accepted Answer

A) eosinophil 
B) lymph 
C) edema 
D) plasma 
E) platelet 
A) eosinophil 
B) lymph 
C) edema 
D) plasma 
E) platelet

Question 11

A higher protein concentration within the distal portion of capillaries draws water into them through the process of

Accepted Answer

A) active transport. 
B) facilitated diffusion. 
C) diffusion. 
D) filtration. 
E) osmosis. 
A) active transport. 
B) facilitated diffusion. 
C) diffusion. 
D) filtration. 
E) osmosis.

Question 12

Which of the following solutes is NOT normally found in the plasma?

Accepted Answer

A) metabolites,wastes,and hormones 
B) ions 
C) albumin 
D) hemoglobin 
E) globulins 
A) metabolites,wastes,and hormones 
B) ions 
C) albumin 
D) hemoglobin 
E) globulins

Question 13

You are taking a lab practical exam.One station has a microscope slide of a cross section through an artery and vein.Which vessel is the artery?

Accepted Answer

A) the vessel with the wider lumen (e.g.,interior space that contains the blood) 
B) the vessel with more muscle tissue and elastic fibers in its wall 
C) the vessel lined only with endothelium 
D) the vessel with valves to prevent backflow 
E) the vessel with a greater overall diameter 
A) the vessel with the wider lumen (e.g.,interior space that contains the blood) 
B) the vessel with more muscle tissue and elastic fibers in its wall 
C) the vessel lined only with endothelium 
D) the vessel with valves to prevent backflow 
E) the vessel with a greater overall diameter

Exam 48: The Circulatory System

What is true about the lymphatic system?

Why is an open circulatory system less efficient than a closed circulatory system?

Changes in the arterial blood pressure are detected by ________ located in the walls of the carotid artery and the arch of the aorta.

In the blood clotting cascade mechanism,which specific enzyme catalyzes the conversion of fibrinogen to fibrin?

When submerged,frogs receive most of their O2 from capillaries within the skin.What structure would contain blood with the highest O2 concentration in a submerged frog,which is not able to breathe using its lungs?

A nurse takes your blood pressure during your annual examination,and she enters a reading of 115/70 in your medical chart.These numbers mean that the

A friend asks you to explain the difference between atherosclerosis and arteriosclerosis.You say,"Well

Which secreted molecule is LEAST likely to effect a significant change in blood pressure?

Leukocytes (white blood cells)account for about ________ of the cells in human blood.

The liquid portion of blood that contains metabolites,wastes,hormones,ions,and a variety of proteins is called the ________.

A higher protein concentration within the distal portion of capillaries draws water into them through the process of

Which of the following solutes is NOT normally found in the plasma?

You are taking a lab practical exam.One station has a microscope slide of a cross section through an artery and vein.Which vessel is the artery?

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When submerged,frogs receive most of their O₂ from capillaries within the skin.What structure would contain blood with the highest O₂ concentration in a submerged frog,which is not able to breathe using its lungs?