A&P II Exam 2 Part 1
AV node
SA node
Tricuspid node
Purkinje fibers
No correct answer
Sympathetic stimulation increase force of contraction
Vagus nerve stimulation increases heart rate
Sympathetic stimulation decreases heart rate
Exercise increases ventricular filling time
All are correct
Vena cava
Right atrium
Pulmonary artery
Left ventricle
Right ventricle
Sense changes in O2 and CO2 blood levels
Sense changes in Ca+ blood levels
Sense changes in venous pressure
Sense changes in arterial pressure
Sense chemical and mechanical changes
Veins have less elastic tissue and less smooth muscle than arteries
Veins contain more fibrous tissue than arteries
Most veins in the extremities have valves
All veins carry deoxygenated blood
Veins can contain up to 65% of the body's blood volume
Elastic tissue
Smooth muscle
Tunicca externa
Collagen tissue
Adipose tissue
Is inversely related to the diameter of the arterioles
Tends to increase if blood viscosity increases
Is directly proportional to the length of the vascular bed
Increases with sympathetic stimulation due to vasoconstriction
All are correct
Increased muscular activity
An increase in blood volume
An increase in venous pressure
Damage to the venous valve
Sympathetic stimulation
Catecholamine release from the adrenal medulla
Increase in stroke volume
Increase in heart rate
Atheriolsclerosis
All are correct
It has a single tunic, only the tunica interna
It has two tunics instead of three
It is less fragile than artery or vein walls
The diameter is larger than arteries and veins
All are correct
Change in arterial pressure
Change in CO2, pH and O2 blood levels
Decrease in venous blood pressure
Changes in arterial elasticity
All are correct
Pulmonary arteries
Coronary arteries
Aorta
Coronary sinus
Carotid arteries
Venous valves which plugs up the capillaries
Large diameter of each individual capillary
Large cross-sectional area of the total capillary bed
Thin walls of veins
Very high blood pressure in capillaries compared to arteries
Decreased Na+ influx, increased Ca+ influx, increased K+ influx
Decreased Na+ influx, increased Ca+ influx, increased K+ efflux
Increased Na+ influx, decreased Ca+ influx, increased K+ influx
Increased Na+ influx, increased Ca+ influx, increased K+ influx
Increased Na+ influx, increased Ca+ influx, increased K+ efflux
Deoxygenated blood returns to the left atrium
Left ventricle pumps oxygenated blood
Bicuspid valve or mitral valve is between the left atrium and left ventricle
Left ventricle pumps blood into the systemic circulation
Left-sided heart failure results in fluid build-up in the lungs causing pulmonary edema