Cardiovascular System

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excalibolg
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301760
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Cardiovascular System
Updated:
2015-04-29 08:27:35
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physiology lf2
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  1. Mean effective filling pressure of the heart ventricle is substantially affected by:
    a. Ventricular contractility and heart rate
    b. Blood volume
    c. Intrathoracic pressure during inspirium
    d. Ventricular systolic compliance
    abc
  2. In the condition of constant flow in the system of tubes:
    a. The lateral inside pressure decreases if the diameter of the tube is reduced
    b. The lateral inside pressure decreases if the diameter of the tubs enlarges
    c. Reduction of the diameter of the tubs results in decrease of the rate of flow
    d. Increase of the diameter of the tube increases the rate of flow
    e. The flow of liquid is independent on the diameter of the tube
    a
  3. The major part of the blood volume is usually in:
    a. Heart
    b. Large arteries
    c. Capillaries
    d. Large veins
    e. Pulmonary veins
    d
  4. The important property of the Purkynje fibres is:
    a. Slow conductance of impulses
    b.Fast conductance of impulses
    c. Amplification of impulses
    d. Tetanic contraction
    e. They are responsible for cardiac rythmicity
    b
  5. Mean rate of blood flow in the aorta is:
    a. Approx. 10 cm/sec
    b. Smaller than in a. carotis
    c. Independent on cardiac putput
    d. Is increased because of turbulence
    e. Inversely related to the diameter of aorta
    e
  6. Peripheral vascular resistance is:
    a. Resistance of the vessels in muscles which prevents muscular fatigue
    b. Resistance to blood flow in the systemic vasculature
    c. Peripheral muscular contraction which prevents excessive blood flow
    d. Dilatation of the large vessels which results in the blood storge
    e. Resistance of elastic fibers in the vascular wall which prevents excessive lenghtening of the arteries
    b
  7. Decrease of the transmural pressure in the carotic sinus results in:
    a. Increase of peripheral vascular resistance
    b. Decrease of the cardiac contractility
    c. Decrease of the cardiac putput
    d. Dilatation of heart atria
    e. Decrease of the ventricular diastolic pressure
    a
  8. According to "myogenic mechanism" of the blood flow autoregulation the increase of the blood pressure in arterioles results in:
    a. Increase of the tissue blood flow
    b. Decrease of the peripheral vascular resistance
    c. Increase of the peripheral vascular resistance
    d. Decrease of vascular tonusDecrease of blood flow
    c
  9. Adrenergic stimulation of the heart results in:
    a. Generalize vasoconstriction
    b. Increase of the coronary blood flow
    c. Increase of the renal blood flow
    d. Increase of the blood flow in the skin
    e. Generalized vasodilatation
    b
  10. The heart work almost equals:
    a. Area of pressure / volume relationship o the ventricle
    b. Index of tension increment in time
    c. Kinetic energy of ejected blood
    d. Systolic blood pressure
    e. Heart rate
    a
  11. The main cardiac and vasomotoric center is located in:
    a. Hypothalamus
    b. Pons and medula oblongata
    c. Brain cortex
    d. Carotic sinus
    b
  12. In normal conditions is in capillaries:
    a. 25% of the total blood volume
    b. The small volume of blood (approx. 5%) only
    c. Very rapid blood flow
    d. The blood flow is more rapid than in arterioles
    e. Very small hematocrit
    b
  13. The is first heart sound is:
    a. Isotonic contraction
    b. Isovolumic contraction
    c. Isovolumic relaxation
    d. Isotonic relaxation
    e. Related to segment ST in ECG
    b
  14. P vawe in ECG is:
    a. At the beginning of atrial contraction
    b. At the end of atrial contraction
    c. At the beginning of ventricular contraction
    d. At the end of ventricular contraction
    e. At the beginning of ejection phase
    a
  15. Vasoconstriction activity of sympaticus is decreased after stimulation of
    a. Carotic sinus
    b. Chemoreceptors in brain stem
    c. Pain receptors
    d. Carotid bodies
    e. Osmoreceptors
    a
  16. Cardiac output in resting person is approx:
    a. 2 l/min
    b. 4 l/min
    c. 5.25 l/min
    d. 7.5 l/min
    e. 9.5 l/min
    c
  17. Normal man has in 100 ml of blood approx.:
    a. 5 mg of Hb
    b. 10 mg of Hb
    c. 16 g of Hb
    d. 10 g of Hb
    e. less then 5 g of Hb
    c
  18. The regional blood flow is regulated mainly by the local metabolic activity in
    a. Brain
    b. Muscle
    c. Skin
    d. Bone
    e. Kidney
    b
  19. Cardiac index is the relation of:
    a. Cardiac output and body surface area
    b. Cardiac output and body weight
    c. Cardiac output and cardiac work
    d. Systolic volume and body surface area
    e. Cardiac output and peripheral vascular resistance
    a
  20. The increase of pressure in carotid sinus results in:
    a. Increase of heart rate
    b. Decrease of venous pressure
    c. Reflex bradycardia
    d. Reflex hyperpnoe
    e. Reflex increase of venous pressure
    c
  21. The common features of cardiac and skeletal muscles are:
    a. Both are striated
    b. Both contain actin and myosin
    c. Strength of contractin is related to the muscle length
    d. Both have intrinsic rythmicity
    abc

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