Biology Heart
Which of the following vessels are the most elastic
Arteries
Aerobic training has an impact on oxygen deficit. Specifically, such training leads to
more rapid steady rate and smaller oxygen deficit
Which of these carries oxygen-poor blood
pulmonary arteries
which term and events apply to a chamber of the heart that is in diastole
relaxing: filling with blood
the basic rhythm of the heartbeat is set by the
SA node
What are the three methods to increase stroke volume?
Skeletal and respiratory pump Sympathetic stimulation
A patient is exhibiting tachycardia but cardiac output is below normal. Why might this occur?
Stoke volume too low
The EKG in B represents
Tachycardia, really fast
A heart attack is often associated with what EKG feature
An elevated S-T segment
From the left ventricle, blood next flows to the
Aorta
Baroreceptors
Are receptors that monitor blood pressure and sends this information to the cardiovascular region of the brain
An alpha blocker, blocks the effects of the sympathetic system on blood vessels. Application of this drug would
Decrease blood pressure
A person has a blood pressure of 130/100
The patient is hypertensive
the second heart sound is cause by
closing of the semilunar valves
we increase parasympathetic stimulation to the heart; heart rate should
decrease
Place these structures in the order that blood returning to the heart from the body would passthrough them. 1. right ventricle 2. left atrium 3. right atrium 4. pulmonary artery 5. left ventricle 6. pulmonary vein
3, 1, 4, 6, 2, 5
All veins carry
Blood toward the heart
The point at which you stop hearing Karotkoff sounds corresponds to
Diastolic pressure
The EKG in C represents
Heart block, really slow
The figure represents a test for
VO2max
you listen to the heart and hear Lub..whistle...dub. This is most likely
a stenotic pulmonary valve
. If we are exercising we would expect
a. Increased activity of the muscular pump b. Increased venous return c. Increased stroke volume d. Increase Cardiac output e. All of the above-right answer
the QRS complex of a ECG represent
electrical signaling through the ventricles
we decrease sympathetic stimulation to the heart; heart rate should
increase
. Put these autorhythmic cells into the correct order for conveying electrical signals through a normal heart. 1. bundle of His 2. internodal pathway 3. Purkinje fibers 4. atrioventricular node 5. sinoatrial nodes 6. left and right bundle branches
5, 2, 4, 1, 6, 3
All of the following are true except
Aerobic training decreases the amount of time the heart is in diastole
. The appropriate treatment to correct this would be
Beta blockers
Which term and events apply to a chamber of the heart that is in systole
Contracting:pumping out blood
The drug atropine inhibits the action of the parasympathetic system on the heart We would therefore expect that atropine would
Increase HR
From the right ventricle, blood next flows to the
pulmonary artery
Which of these carries the most highly oxygenated blood
pulmonary vein
. A person jumps up from a prone position and becomes dizzy because their BP has dropped...Describe in detail the barorecptor response that will occur to return to homeostasis
table
