301-375 Physiology

The systolic blood volume of a teenager at rest is equal to:

• 60-70 ml

• 40- 60 ml

• 80-100 ml

• 10-20 ml

• 20-50 ml

An extrasystole is called:

• Extraordinary contraction of the ventricles from the ectopic focus of excitation

• increasing the rhythm of the CA node

• increasing the rhythm of the AV node

• decrease in the rhythm of the AV node

• increased ventricular function

Automatism is the ability of the heart:

• to be excited under the influence of impulses arising in the organ itself without external influences

• shrink under the influence of atrial blood filling

• to be excited by the action of extracardial nerves

• not to be excited by external stimuli

• to contract under the influence of blood filling of the ventricles

With the correct sinus rhythm, the heart rate on the ECG is determined by the formula (R-R per second):

• 60сек/R-R

• 600/ R-R

• R-R/60

• R-R/40

• 500/R-R

What characterizes the first phase of the cardiac activity cycle:

• atrial systole, ventricular diastole

• ventricular systole, atrial diastoles

• atrial and ventricular systole

• atrial and ventricular diastole

• general pause

Choose the optimal systolic blood pressure for a 5-6 year old child:

• 100 mmHg

• 130 mmHg

• 125 mmHg

• 115 mmHg

• 90 mmHg

What are the blood pressure indicators of a newborn:

• 70/50 mmHg

• 50/20 mmHg

• 100/65 mmHg

• 110/70 mmHg

• 60/40 mmHg

The sinoatrial node sets the heart rate rhythm (imp/min) equal to:

• 60-80

• 15-20

• 30-40

• 90-120

• 40-50

Which vessels create the greatest resistance to blood flow:

• arterioles

• capillaries

• aorta and major arteries

• veins

• venules

Irritation of the vagus nerve causes:

• decrease in heart rate and decrease in strength

• decrease in heart rate and increase in strength

• increased strength and heart rate,

• the heart rate and strength do not change

• all answers are correct