VTPP 435 EXAM QUESTIONS AND ANSWERS LATEST UPDATE 100%
CORRECT A+ GRADED. Buy Quality Materials!
I you dilate the systemic vessels, is does what to BP?
Decrease BP
Flow
1/R
if length of a vessel increases, what happens to the resistance
Increases
Velocity of flow formula
Q/A
What is the heart mostly made of?
Myocardium (myocardiocytes)
What is the pericardium attached to?
diaphragm
What percent of oxygen does the heart use?
80%
What do the coronary artery and veins do?
Feed blood to the muscle of the heart
What are the chords that hold the valves of the heart shut during contraction?
Chordae tendineae
What are the chordae tendineae attached to on the heart muscle?
Papillary muscle
What valves of the heart remain closed during contraction?
AV valves
What goes of the heart remain close during relaxation?
Semilunar valves
Sarcomeres
contractile units within myofibrils, the smallest contractile unit of a muscle
Autorhythmic cells
pacemaker cells
What percent of the cell does the mitochondria take up?
1/3 of cell volume
Desmosomes
Anchoring junctions that prevent cells from being pulled apart, in intercalated disks
Troponin
A protein of muscle that together with tropomyosin forms a regulatory protein complex
controlling the interaction of actin and myosin and that when combined with calcium
ions permits muscular contraction
What affects the force of contraction in the heart muscle?
The length of the sarcomeres
Look at action potential graph of cardiac contractile cell
TRUEEEE
Where is the SA node of the heart located?
Right atrium
CORRECT A+ GRADED. Buy Quality Materials!
I you dilate the systemic vessels, is does what to BP?
Decrease BP
Flow
1/R
if length of a vessel increases, what happens to the resistance
Increases
Velocity of flow formula
Q/A
What is the heart mostly made of?
Myocardium (myocardiocytes)
What is the pericardium attached to?
diaphragm
What percent of oxygen does the heart use?
80%
What do the coronary artery and veins do?
Feed blood to the muscle of the heart
What are the chords that hold the valves of the heart shut during contraction?
Chordae tendineae
What are the chordae tendineae attached to on the heart muscle?
Papillary muscle
What valves of the heart remain closed during contraction?
AV valves
What goes of the heart remain close during relaxation?
Semilunar valves
Sarcomeres
contractile units within myofibrils, the smallest contractile unit of a muscle
Autorhythmic cells
pacemaker cells
What percent of the cell does the mitochondria take up?
1/3 of cell volume
Desmosomes
Anchoring junctions that prevent cells from being pulled apart, in intercalated disks
Troponin
A protein of muscle that together with tropomyosin forms a regulatory protein complex
controlling the interaction of actin and myosin and that when combined with calcium
ions permits muscular contraction
What affects the force of contraction in the heart muscle?
The length of the sarcomeres
Look at action potential graph of cardiac contractile cell
TRUEEEE
Where is the SA node of the heart located?
Right atrium
