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50 Cards in this Set

  • Front
  • Back
blood in the inferior vena cava will drain into the
C.) right atrium
the primary pacemaker of the heart is the
D.) SA node
the amount of blood contained in a ventricle at the end of atrial systole is the
C.) end-diastolic volume
cardiac output
B.) is the product of the stroke volume and the heart rate
a patient has an EDV of 90 mL, an ESV of 40 mL and a heart rate of 50 beats/min. What is this patients stroke volume ?
C.) 50mL
which of the following is true of hte left ventricle
B.) the left ventricle has a thicker myocardium than right ventricle
each of the cardiac valves
A.) opens and closes in response to changes in pressure
Blood leaving the left atrium passes through the bicuspid valve to enter the
B.) left ventricle
all of the following statements about circulation of blood rate are true except
C.) the aorta is part of the pulmonary circulation
blood flows from the right atrium
A.) through the tricuspid valve into the right ventricle
place the following in order of the propagation of a cardiac action potential : 1.) Purkinje fibers 2.) SA node 3.) right and left bundle branches 4.) AV bundle 5.) AV node
D.) 2,5,4,3,1
the QRS complex of the ECG is associated with
B.) ventricular depolarization
during the cardiac cycle, in order for blood to be ejected from the heart the pressure inside the ventricle must increase. this increase in intraventricular pressure is due to:
B.) ventricular contraction
heart sounds
B.) are the result of the cardiac valves closing and causing turbulent flow
which of the following correctly describes how stroke volume regulated
A.) by adjusting the preload, or degree of stetch on the heart before it contracts.
B.) by adjusting the contractility, or strenth of contraction of the heart at a given preload.
- D.) A and B are correct
the Frank-Starling law of the heart states that
B.) the right and left ventricles must pump equal amounts of blood with each heart beat.
which of the following is not true of regulation of heart rate
A.) the brain cannot modulate heart rate
which equation is correct
C.) NFP=BHP+IFOP-BCOP-IFHP
the sites of exchange between the blood and the tissues are the
C.) capillaries
the blood vessels that drain blood directly from the capillary beds are the
D.) venules
which of the following does not cause vasodilation
A.) increased sympathetic stimulation
which blood vessels play a key role in regulating blood distribution and pressure because their diameters may be easily and rapidly adjusted
C.) arterioles
which part of the arterial wall contains smooth muscle
B.) tunica media
which pressures contribute to filtration
A.) blood hydrostatic pressure (BHP)
B.) interstitial fluid osmotic pressure (IFOP)
- D.) A and B are correct
which resistance factor is most important in controlling blood pressure
A.) diameter of the arteriole lumen
given the heart rate (70 beats/min), stroke volume (70ml), and blood pressure (120/80 mmHg) calculate the cardiac output (ml/min)
B.) 4900 ml/min
cardiac muscle relies primarily on _______ for ATP production.
A.) aerobic resipartion
increased secretion of which of the following hormones would decrease blood
B.) atrial natriuretic peptide (ANP)
autoregulation of blood flow
A.) responds to metabolic demand by directing blood to the most active tissues
the T wave of ECG is associated with
D.) ventricular repolarization
on the venous end of the capillary, the pressures governing bulk flow favor______
B.) net reabsorption
which of the following classification of respiratory structures is correctly described
A.) structural, upper respiratory system: nose pharynx and associated structures
B.) structural, lower respiratory system: larynx, trachea, bronchi, lungs
C.) functional, conducting portion: interconnecting cavities and tubes outside and within the lungs
D.) functional, respiratory portion: tissues within the lungs where gas exchange occurs
E.) All of these are correct
which of the following is correctly described
B.) walls of the bronchioles contain
smooth muscle that regulate airway resistance
the larynx
A.) connects the pharynx to the trachea
B.) is the primary site of voice production
C.) normally recieves only air
D.) lies anterior to the esophagus
E.) All of these are correct
the trachea
A.) conducts air from the larynx into the bronchi
B.) is lined with pseudostratified ciliated columnar epithelium
D.) A & B are correct
each of the following is part of the respiratory membrane except the
B.) lymphatic vessel basement membrane
tidal volume is
A.) the amount of air moved in and out of the lungs during normal breathing the lungs
the basic steps of gas exchange , or respiration, in the body include
A.) pulmonary ventilation
B.) external respiration
C.) internal respiration
D.) A,B & C are correct
when the diaphragm and external intercostal muscles contract, which of the following actions does not occure
B.) the pressure inside the lung increases
the most important method of capillary exchange of CO2, O2, glucose, amino acide, and hormone is _______
A.) diffusion
exhilation (expiration)
A.) is usually a passive process st rest
B.) depends upon the elastic recoil of the chest wall and lungs
C.) A and B are correct
which of the following is not correctly described
C.) residual volume: amount of air mooved in and out of the lungs during normal quiet breathing
external respiration
A.) moves CO2 out of the blood and O2 into the blood
B.) is the exchange of gases between the lungs and the blood
D.) A and B are correct
during internal respiration
A.) gases are exchanged between the blood and the tissues
B.) O2 moves out of the blood and CO2 moves into the blood
D.) A and B are correct
the presence of ______ decreases the surface tension in the alveoli preventing tehir collapse after exhilation. Many premature infants have respiratory problems related to insufficient amount of this substance
B.) surfactant
what is the most important factor in determining whether O2 dissociates from or binds to hemoglobin
C.) Po2
how is CO2 transported in blood
A.) as CO2 dissolved in the plasma
B.) bound to hemoglobin
C.) as bicarbonate ions
E.) A,B and C are correct
how is O2 transported
A.) as O2 dissolved in the plasma
B.) bound to hemoglobin
D.) A and B are correct
the P wave of the ECG is associated with
A.) atrial depolarization
which ion is resposible for the plateau phase of the cardiac action potential
B.) calcium ion