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
a. Ventricular contractility and heart rate
b. Blood volume
c. Intrathoracic pressure during inspirium
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
The major part of the blood volume is usually in:
B. Large veins
The important property of the Purkynje fibres is:
A. Fast conductance of impulses
Mean rate of blood flow in the aorta is:
E. Inversely related to the diameter of aorta
Peripheral vascular resistance is:
B. Resistance to blood flow in the systemic vasculature
Decrease of the transmural pressure in the carotic sinus results in:
B. Increase of peripheral vascular resistance
According to "myogenic mechanism" of the blood flow autoregulation the increase of the blood pressure in arterioles results in:
B. Increase of the peripheral vascular resistance
Adrenergic stimulation of the heart results in:
B. Increase of the coronary blood flow
The heart work almost equals:
D. Area of pressure / volume relationship o the ventricle
The main cardiac and vasomotoric center is located in:
A. Pons and medula oblongata
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. The small volume of blood (approx. 5%) only
The is first heart sound is:
E. Isovolumic contraction
P vawe in ECG is:
C. At the beginning of atrial contraction
Vasoconstriction activity of sympaticus is decreased after stimulation of
E. Carotic sinus
Cardiac output in resting person is approx:
A. 5.25 l/min
Normal man has in 100 ml of blood approx.:
D. 16 g of Hb
The regional blood flow is regulated mainly by the local metabolic activity in
C. Muscle
Cardiac index is the relation of:
D. Cardiac output and body surface area
The increase of pressure in carotid sinus results in:
B. Reflex bradycardia
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
a. Both are striated
b. Both contain actin and myosin
c. Strength of contractin is related to the muscle length