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Multiple Choice Quiz
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1
Which of the following lacks a circulatory system?
A)Paramecium
B)planarian
C)jellyfish
D)all of the above
2
In organisms without circulatory systems, gases, nutrients and wastes are exchanged by diffusion.
A)True
B)False
3
A sac body plan makes a circulatory system unnecessary.
A)True
B)False
4
In an open circulatory system fluid is not always contained within vessels.
A)True
B)False
5
A closed circulatory system has _____.
A)a system of blood vessels
B)a heart
C)valves to prevent backflow
D)all of the above
6
Hemolymph contains_____.
A)interstitial fluid
B)blood
C)both A and B
7
The hemolymph of a grasshopper carries _____.
A)nutrients
B)oxygen
C)both A and B
8
Nematodes use their _____ for transport of materials.
A)gastrovascular cavity
B)body cavity's coelomic fluid
C)circulatory system
9
All invertebrates have an open circulatory system.
A)True
B)False
10
Which of the following is absent in an animal with a closed circulatory system?
A)a heart
B)a hemocoel
C)blood vessels
D)none of the above
11
Earthworms depend on their circulatory system for the transport of oxygen to body cells.
A)True
B)False
12
All vertebrates have a closed circulatory system.
A)True
B)False
13
Blood is carried away from the heart by _____.
A)arteries
B)veins
C)capillaries
14
Capillaries allow exchange of nutrient and waste molecules across their thin walls.
A)True
B)False
15
Which of the following have valves to prevent backflow?
A)arteries
B)veins
C)capillaries
16
Blood pressure is affected by constriction and dilation of _____.
A)veins
B)venules
C)arterioles
D)capillaries
17
During strenuous excericse, the precapillary sphincters of the skeletal muscles will be relaxed.
A)True
B)False
18
The _____ have well-developed walls with a thick middle layer of elastic tissue and smooth muscle.
A)arteries
B)capillaries
C)veins
19
Blood is drained from capillaries by _____.
A)veins
B)arterioles
C)venules
D)arteries
20
The pressure of blood in arteries is _____.
A)high
B)low
21
The ventricles of _____ have a partial separation in them.
A)birds
B)mammals
C)amphibians
D)reptiles
22
The _____ circuit pumps blood to the tissues.
A)systemic
B)pulmonary
23
Birds and mammals have _____ chamber hearts.
A)one
B)two
C)three
D)four
24
Pulmonary circulation pumps blood to the _____.
A)brain
B)lungs
C)digestive system
D)all of the above
25
A single ventricle is present in _____.
A)amphibians
B)fish
C)most reptiles
D)all of the above
26
A pulmonary circuit is present in fish.
A)True
B)False
27
Gill capillaries receive _____ blood.
A)oxygen poor
B)oxygen rich
28
In birds and mammals the _____ side of the heart performs pulmonary circulation.
A)right
B)left
29
Amphibians and most reptiles have _____.
A)two atria
B)one ventricle
C)pulmonary and systemic circulation
D)all of the above
30
The _____ ventricle is larger than the other ventricle.
A)right
B)left
31
There is some mixing of deoxygenated and oxygenated blood in the hearts of amphibians.
A)True
B)False
32
The supply of oxygen to the heart can be cut off by a blockage in the _____ resulting in a heart attack.
A)aorta
B)coronary arteries
C)pulmonary vein
D)inferior vena cava
33
The heart is encased in a sac called the _____ which secretes a lubricating fluid.
A)pleura
B)mesentery
C)pericardium
D)diaphragm
34
The myocardium consists largely of _____ muscle.
A)cardiac
B)smooth
C)skeletal
35
Skeletal muscles contracting against the veins are primarily responsible for the movement of blood in the veins.
A)True
B)False
36
The _____ separate(s) the right side of the heart from the left side of the heart.
A)chordae tendineae
B)tricuspid valve
C)septum
D)semilunar valves
37
The upper heart chambers which collect the blood returning to the heart are called _____.
A)auricles
B)atria
C)ventricles
38
Backflow of blood in the heart is prevented by the _____.
A)tricuspid valves
B)semilunar valves
C)bicuspid valve
D)all of the above
39
The chordae tendineae _____.
A)support the atrioventricular valves
B)keep the atrioventricular valves from inverting when the ventricle contracts
C)are attached to muscular projections of the ventricular walls
D)all of the above
40
The tricuspid valve is between the right atrium and the right ventricle.
A)True
B)False
41
The heart is lined with connective and endothelial tissues knows as the _____.
A)pericardium
B)myocardium
C)endocardium
42
The pulmonary veins carry deoxygenated blood.
A)True
B)False
43
Where does the blood go when it leaves the right atrium?
A)the left atrium
B)the right ventricle
C)the body
D)the lungs
44
The _____ carry deoxygenated blood to the lungs.
A)pulmonary arteries
B)coronary arteries
C)pulmonary veins
D)superior and inferior vena cava
45
In humans, oxygenated and deoxygenated blood never mix.
A)True
B)False
46
As blood leaves the left ventricle it flows through the _____.
A)right atrioventricular valve
B)aortic semilunar valve
C)tricuspid valve
D)pulmonary semilunar valve
47
Since the left ventricle must pump blood to the whole body, its myocardium is much thicker than the myocardium in the right ventricle.
A)True
B)False
48
The _____ collects deoxygenated blood returning to the heart.
A)right atrium
B)left atrium
C)right ventricle
D)left ventricle
49
The right ventricle sends blood into the _____.
A)aorta
B)pulmonary trunk
C)right atrium
D)left ventricle
50
The right atrioventricular valve prevents blood flow from the _____.
A)right atrium to the right ventricle
B)right ventricle to the pulmonary trunk
C)right atrium to the left atrium
D)right ventricle to the right atrium
51
Systole refers to the contraction of the heart chambers.
A)True
B)False
52
A heart murmur is the result of the flow of blood back into the atria when the ventricles contract.
A)True
B)False
53
The diastolic pressure of an average blood pressure measurement 120/80 is _____.
A)120
B)80
C)200
54
The heart is in diastole about 50% of the time.
A)True
B)False
55
The heartbeat is _____.
A)initiated by the brain
B)regulated by the nervous system
C)initiated by the sinoatrial node
D)both B and C
56
An electrocardiogram identifies whether the heartbeat is regular or not.
A)True
B)False
57
The hepatic portal system takes blood from the intestines to the _____.
A)heart
B)lungs
C)liver
D)kidneys
58
The major pathway for delivery of blood to the tissues in the systemic circuit is the _____.
A)aorta
B)inferior vena cava
C)superior vena cava
59
Varicose veins develop when _____.
A)blood pressure is high
B)the valves become weak and ineffective
C)blood clots block the veins
60
It is the _____ pressure that is emphasized when medical treatment is being considered.
A)systolic
B)diastolic
61
The American Heart Association recommends a diet low in saturated fat and cholesterol and rich in fruits and vegetables to prevent _____.
A)hypertension
B)atherosclerosis
C)hemophilia
D)anemia
62
The "bad" lipoprotein is _____.
A)low density
B)high density
63
There are several genetic factors which predispose individuals to heart disease.
A)True
B)False
64
Cardiovascular disease is the number two cause of untimely death in the Western countries.
A)True
B)False
65
Which of these increases your risk of hypertension?
A)smoking
B)weight gain greater than 20% above recommended weight
C)overactivity of the gene for angiotensinogen
D)all of the above
66
When a small cranial arteriole bursts or is blocked by an embolus, _____ occurs.
A)ventricular fibrillation
B)a stroke
C)a heart attack
D)none of the above
67
To lower the risk of heart disease, you should avoid _____.
A)olive oil
B)fresh fruits
C)margarine
D)none of the above
68
Which is necessary for clotting?
A)platelets
B)fibrinogen
C)prothrombin
D)all of the above
69
Oxygen is transported by _____.
A)lymph
B)red blood cells
C)white blood cells
D)platelets
70
The hormone erythropoietin _____.
A)stimulates the production of red blood cells by spongy bone marrow
B)is produced when blood oxygen is low
C)is produced by the kidneys
D)all of the above
71
Oxygen binds to _____.
A)the iron component of hemoglobin
B)the plasma membrane of the red blood cells
C)the protein chains of hemoglobin
D)low density lipoprotein
72
A blood clots consists of _____.
A)platelets
B)fibrin
C)red blood cells
D)all of the above
73
Mature red blood cells do not have a nucleus.
A)True
B)False
74
Defense against invasion by bacteria and viruses is provided by _____.
A)macrophages
B)platelets
C)lymphocytes
D)both A and C
75
If vitamin _____ is missing from the diet, hemorrhagic disorders can also develop.
A)C
B)D
C)K
D)A
76
Oxygen and nutrients exit a capillary near the _____ end.
A)arterial
B)venous
77
The blood helps distribute heat throughout the body.
A)True
B)False
78
Tissue fluid is most like _____.
A)plasma
B)the blood
C)plasma minus most proteins
D)none of the above
79
Plasma contains _____.
A)nitrogenous waste
B)hormones
C)carbon dioxide
D)all of the above
80
Lymph is tissue fluid inside lymphatic vessels.
A)True
B)False





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