Wiley the Heart
Which vessels supply oxygenated blood to BOTH the left ventricles and right ventricles. Select all that apply.
-Anterior interventricular artery -Posterior interventricular artery
Which statements about the heart's location are correct? Select all that apply
-The heart's apex points anteriorly, inferiorly and to the left -most of the heart lies to the left of the thoracic midline -the adult male heart is, on average, slightly larger than the adult female heart
The stroke volume at rest is what percentage of end diastolic volume?
50-60%
Which of the following statements is INCORRECT?
A top endurance athlete could have a cardiac reserve that is half of their resting cardiac output
What happens during isovolumetric contraction in the heart?
All four valves are closed
Prolapse of the atrioventricular valves is prevented by
contraction of the papillary muscles.
The atria receive blood from all of the following except: a. pulmonary veins b. superior vena cava c. coronary sinus d. inferior vena cava e. all of these choices supply blood to the atria
e. all of these choices supply blood to the atria
The thickest wall in the heart due to its increased work load is the
left ventricle
Collateral circulation in the heart
may allow bypass of a blocked coronary artery.
Which of the following statements is correct?
Sulci contain coronary blood vessels
The coronary sinus empties into the left atrium
False, it empties into the right atrium.(it's a vein)
Which structure is visible on the surface of the heart? -papillary muscle -chordae tendineae -interventricular septum -pectinate muscle -left auricle
Left auricle
Which ECG wave correlates with ventricular systole?
QRS complex
Which wave is matched correctly with the heart's activity?
S-T segment - the ventricles are depolarized
The Franklin-Starling law of the heart states:
The more the heart is stretched pre-contraction the stronger the force of contraction
The left anterior descending artery supplies blood to:
The walls of both ventricles
Which of the following places the phases of the cardiac cycle in correct order?
atrial contraction, isovolumetric contraction, ventricular ejection, isovolumetric relaxation, ventricular filling, atrial contraction
Which of the following statements is false in reference to heart regulation?
baroreceptors measure the amount of sodium ions present in the blood (they measure blood pressure changes)
When comparing cardiac muscle tissue to skeletal muscle tissue, which statement is true?
both types of fibers are striated
