Exercise Physiology Practice Final

156 Questions  I  By Kingslo
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Practice Final for exercise physiology

  
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1.  Hematocrit is a % by volume of packed blood cells after centrifugation
A.
B.
2.  Oxygen demand by muscles during exercise is 10 - 15x greater than at rest.
A.
B.
3.  During prolonged submaximal exercise in a hot/humid environment, ventilation tends to shift downward
A.
B.
4.  The intrapleural pressure is lower than atmospheric pressure
A.
B.
5.  Sedentary individuals typically have a resting SV of 
A.
B.
C.
D.
6.  Current evidence suggests that the normal rhythm of breathing is generated by the interaction between _____ separate respirator rhythm centers located in the medulla oblongata and the pons.
A.
B.
C.
D.
7.  During heavy exercise, the heart beats at ___ bpm
A.
B.
C.
D.
8.  Deoxyhemoglobin is simply hemoglobin carrying carbon dioxide 
A.
B.
9.  During maximal exercise, 80 - 85% of blood is distributed to working muscles
A.
B.
10.  Blood flow is inversely proportional to resistance
A.
B.
11.  The number of beats per minute is known as the heart rate
A.
B.
12.  Receptors that are sensitive to change in arterial blood pressure.
A.
B.
C.
D.
13.  In regards to peripheral chemoreceptors 
A.
B.
C.
14.  During prolonged exercise in a hot/humid environment, ventilation "drifts" upward due to the influence of rising body temperature on the respiratory control center
A.
B.
15.  The alveolar ventilation + dead space ventilation = pulmonary ventilation
A.
B.
16.  The amount of air moved in and out of the lungs per min
A.
B.
C.
D.
17.  The heart at rest beats at ____ bpm
A.
B.
C.
D.
18.  Endurance athletes typically have a stroke volume of 160 - 200 ml during exercise
A.
B.
19.  Plasma contains(check all that apply)
A.
B.
C.
D.
20.  Shortness of breathing is termed
A.
B.
C.
D.
21.  The __________ lines the thoracic wall
A.
B.
C.
D.
22.  An ST segment depression indicates myocardial infarction 
A.
B.
23.  The pacemaker of the heart is known as the _________
A.
B.
C.
D.
24.  Max heart rate is found by subtracting ones age from 230
A.
B.
25.  Venoconstriction is stimulated by the SNS
A.
B.
26.  The pulmonary circuit
A.
B.
C.
D.
27.  Hydrogen binds to Hb to prevent acidity
A.
B.
28.  An increase in blood pressure results in
A.
B.
C.
D.
29.  During the Frank Starling mechanism, increase preload will stretch the sarcomere from _______
A.
B.
C.
D.
30.  The vital capacity is 
A.
B.
C.
D.
31.  Carbonic anhydrase converts CO2 and water into Bicarbonate
A.
B.
32.  Airway collapse; air is trapped in the lungs
A.
B.
C.
D.
33.  Ventilation control during exercise is fine tuned by ____________
A.
B.
C.
D.
34.  Chronic obstructive lung disease is linked with an increased expiratory airflow and an decreased inspiratory airflow due to constant airway narrowing
A.
B.
35.  The pulmonary system limits exercise performance in healthy young subjects during prolonged submaximal exercise (work rates (<90% VO2 max)
A.
B.
36.  Resistance depends on 
A.
B.
C.
D.
37.  The inflection point where VE increases exponentially is known as the respiratory threshold 
A.
B.
38.  The respiratory control center uses only negative feedback to achieve tight control
A.
B.
39.  Which is the current formula for Air Flow?
A.
B.
C.
D.
40.  The ECG may indicate coronary heart disease
A.
B.
41.  Training can eventually change the structure of the lungs so it could take up more oxygen.
A.
B.
42.  Strength of ventricular contraction is enhanced by acetylcoline
A.
B.
43.  In an untrained subject doing incremental exercise, ventilation increases linearly up to 
A.
B.
C.
D.
44.  _______ promotes smooth muscle relaxation
A.
B.
C.
D.
45.  Plasma is the portion of  blood that repairs injuries
A.
B.
46.  After leaving the myocardium, blood from the coronary circulation enters the coronary sinus
A.
B.
47.  Ventricular diastole is when the ventricles are relaxed/relaxing
A.
B.
48.  A T wave inversion is an indicator of ischemia
A.
B.
49.  The typical lung capacity is at
A.
B.
C.
D.
50.  Contraction of the heart depends on electrical stimulation of the _________
A.
B.
C.
D.
51.  Autorhythmic cells depolarize spontaneously 
A.
B.
52.  HCO3- is a strong acid
A.
B.
53.  Current eveidence suggests that respiratory muscles fatigue at prolonged exercise lasting more than
A.
B.
C.
D.
54.  Arterial PO2 and PCO2 are maintained relatively constant during a sub maximal exercise
A.
B.
55.  Baroreceptors are activated/stimulated when BP is too low
A.
B.
56.  Which part of the brain is is the respiratory control center?
A.
B.
C.
D.
57.  During isovolumetric contraction (check all that apply)
A.
B.
C.
D.
58.  An decrease in blood pressure results in an increase in sympathetic nervous system activity
A.
B.
59.  The myocardium is mainly aerobic
A.
B.
60.  Increased HR is due to an increase in cardiac output 
A.
B.
61.  The average cardiac output is 6 L/m
A.
B.
62.  There are 2 types or Humoral receptors
A.
B.
63.  Ventricular Systole is the first phase of the cardiac cycle
A.
B.
64.  Hypertension can cause(check all that apply)
A.
B.
C.
D.
65.  The central chemoreceptors are sensitive to increases in ______ and decreases in pH
A.
B.
C.
D.
66.  The peripheral chemoreceptors are sensitive to increases in PCO2 and decreases in PO2 or pH
A.
B.
67.  Beta blocking drugs increase the myocardial oxygen demand
A.
B.
68.  Systolic pressure provides an indication of peripheral resistance
A.
B.
69.  Amount of air moved per breath (normal breathing)
A.
B.
C.
D.
70.  Arteries in the coronary circulation originate 
A.
B.
C.
D.
71.  Pulse pressure is the difference between systolic and diastolic pressure
A.
B.
72.  Blood pressure above ____ is known as high blood pressure
A.
B.
C.
D.
73.  An untrained individual may have 30 percent of cardiac injury from a myocardial infarction
A.
B.
74.  As the VO2 max increase the double product decreases
A.
B.
75.  When peripheral resistance decreases, blood pressure increases
A.
B.
76.  Nitric Oxide is produced in the mesothelium 
A.
B.
77.  Receptors that are sensitive to muscle metabolites
A.
B.
C.
D.
78.  During prolonged exercise, the cardiac output is maintained due to a decrease in stroke volume and an increase in HR.
A.
B.
79.  The atria contract during ventricular diastole
A.
B.
80.  At rest, the breathing rhythm is dominated by pacemaker neurons in the 
A.
B.
C.
D.
81.  The primary drive to increase ventilation during exercise in from higher brain centers
A.
B.
82.  Training can lower exercise ventilation 20 - 30% lower at the same submaximal work rate
A.
B.
83.  The systemic circulation has lower pressure than the pulmonary circulation 
A.
B.
84.  The cardiac cycle has 2 phases
A.
B.
85.  Carbon dioxide that is bound to hemoglobin is called carbaminohemoglobin
A.
B.
86.  When blood viscosity increases, blood pressure decreases
A.
B.
87.  The typical value for the tidal volume is 
A.
B.
C.
D.
88.  The Ocontent of blood (100% Hb saturation) for males is typically
A.
B.
C.
D.
89.  The QRS complex represents ____________
A.
B.
C.
D.
90.  During exercise, the preBotzinger Complex interacts with _________ along with two additional regulatory centers in the pons to regulate breathing
A.
B.
C.
D.
91.  When the diaphragm contracts, the lungs __________
A.
B.
C.
D.
92.  What is atmospheric pressure at rest?
A.
B.
C.
D.
93.  At rest, what is the filling time of the heart?
A.
B.
C.
D.
94.  An increase in pulmonary ventilation causes exhalation of additional CO2, which results in a reduction of blood PCO2 and a lowering of hydrogen ion concentration
A.
B.
95.  Volume of air space that reaches the respiratory zone
A.
B.
C.
D.
96.  Which vessels create the most resistance
A.
B.
C.
D.
97.  Cardiac muscle tissue is also known as endocardium
A.
B.
98.  Function of this later of the heart serves as a lubricative outer covering
A.
B.
C.
D.
99.  During incremental exercise (check all that apply)
A.
B.
C.
D.
100.  When blood volume increases, blood pressure increases
A.
B.
101.  __ of CO2 is found in the blood is transported as bicarbonate
A.
B.
C.
D.
102.  Cardiac output and total vascular resistance influence mean arterial pressure
A.
B.
103.  During exercise, the SV plateaus at approx. 40-60% of VO2 max
A.
B.
104.  The O2 content of blood (100% Hb saturation) for females is typically
A.
B.
C.
D.
105.  When heart rate increase, blood pressure increases
A.
B.
106.  VO2 = Cardio Output x VO2 difference; which equation is this?
A.
B.
C.
D.
E.
107.  The ventricles contract ___ sec after the atria
A.
B.
C.
D.
E.
108.  Amount of blood ejected in each beat is known as the _______
A.
B.
C.
D.
109.  _________ of elite endurance athletes experience hypoxemia during high intensity exercise (>90% VO2 max)
A.
B.
C.
D.
110.  Vasoconstriction to visceral organs and inactive tissues are due to the SNS
A.
B.
111.  The diaphragm is innervated by somatic motor neurons
A.
B.
112.  Which zone warms and humidifies the air?
A.
B.
C.
113.  When HCO3- diffuses out of the RBC's into plasma
A.
B.
C.
D.
114.  The _________ consists of autorhythmic cells
A.
B.
C.
D.
115.  Beta blocking drugs increase heart rate
A.
B.
116.  Atherosclerosis is fatty plaque that narrows the aorta
A.
B.
117.  The heart cannot be excited if the sympathetic neurons connecting to it are cut off
A.
B.
118.  Long term regulation by the mean arterial blood pressure is influenced by
A.
B.
C.
D.
119.  The vagus nerve regulates the heart rate via the sympathetic nervous system
A.
B.
120.  Each gram of Hb can transport ____
A.
B.
C.
D.
121.  There is new evidence that respiratory muscle fatigue does occur during high intensity exercise (>90% VO2 max)
A.
B.
122.  The tidal volume x the alveolar ventilation will give you the amount of air moved in and out of the lungs per minute
A.
B.
123.  Receptors that are sensitive to force and speed of muscular movement
A.
B.
C.
D.
124.  Systole during heavy exercise is longer than diastole during heavy exericse
A.
B.
125.  A rough index of workload on the heart is also known as
A.
B.
C.
D.
126.  During heavy or submaximal exercise, a linear rise in ventilation is due to _________(check all that apply)
A.
B.
C.
D.
E.
127.  At rest, expiration is passive
A.
B.
128.  At rest, ____ of blood is distributed to to muscles
A.
B.
C.
D.
129.  The myocardium receives blood from the arota
A.
B.
130.  How much % of CO2 is dissolved in the plasma
A.
B.
C.
D.
131.  Low partial pressure in the tissues increases the the chance of O2 release to tissues by Hb
A.
B.
132.  At the onset of exercise, parasympathetic nerves fire thus increasing the HR 
A.
B.
133.  The systemic circulation begins at the left side of the heart
A.
B.
134.  The atria relaxes during ventricular systole
A.
B.
135.  Random movement of molecules from an area of high concentration to an are of lower concentration is known as osmosis
A.
B.
136.  The ______ represents atrial depolarization 
A.
B.
C.
D.
137.  Receptors that are sensitive to an increase in PCO2 exist.
A.
B.
C.
138.  The amount of blood pumped by the heart each minute is known as the _________
A.
B.
C.
D.
139.  An ejection fraction of less than ___ indicates myocardial contraction
A.
B.
C.
D.
140.  Decreased pH increases the Hb-O2 affinity thus resulting in a rightward shift of the curve
A.
B.
141.  When standing, most of the blood goes to the apex of the lung
A.
B.
142.  During prolonged exercise, cardiac output is decreases
A.
B.
143.  Central chemoreceptors are located in the___________
A.
B.
C.
D.
144.  At 150 - 200 beats per min, approx how long does it take to fill the heart
A.
B.
C.
D.
145.  Excessive mucus blocked in the airways
A.
B.
C.
D.
146.  What is considered normal blood presssure?
A.
B.
C.
D.
147.  Specialized cells located in the aortic and carotid bodies
A.
B.
C.
D.
148.  The energy for the myocardium is mainly carbohydrates
A.
B.
149.  Carbon dioxide is transported in ONLY 3 blood forms
A.
B.
150.  During isovolumetric relaxation
A.
B.
C.
D.
E.
151.  Which of the following causes a rightward shift of the dissociation curve(check all that apply)
A.
B.
C.
D.
152.  One should stop exercise if their exercise induced ST segment is greater than 1 mm
A.
B.
153.  Which formula is correct in calculating the Mean Arterial Pressure
A.
B.
C.
D.
154.  Over __ of the O2 transported in blood is chemically bonded with hemoglobin
A.
B.
C.
D.
155.  Resting systole of the ventricles is longer than diastole
A.
B.
156.  Hemoglobin has a higher affinity for O2 than myoglobin
A.
B.
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