Exam 11 JUN

Question 1 of 15

1

which is a correct statement about the blood vessels?

Select one of the following:

  • blood pressure and blood flow are inversely related

  • norepinephrine can cause both vasoconstriction and vasodilation

  • the volume of blood and the hydrostatic pressure are inversely related

  • almost all of the blood vessels are line with endothelial cells

Explanation

Question 2 of 15

1

Which is a correct statement about the actions of the heart?

Select one of the following:

  • decreasing the blood vessel size will decrease the blood pressure

  • testosterone can impact the cardiac output

  • increasing the arterial pressure will instantly decrease the end systolic volume

  • the end diastolic volume is only sometimes greater than the end systolic volume

Explanation

Question 3 of 15

1

Epinephrine causes an increase in ____ in the muscles surrounding the arterioles near the ____ muscles.

Select one of the following:

  • myosin light chain kinase activity - bicep

  • amount of calcium-bound troponin - bicep

  • myosin light chain kinase activity - stomach

  • amount of calcium-bound troponin - stomach

Explanation

Question 4 of 15

1

At the end of the _____ phase, you can expect the ventricles be mostly _______

Select one of the following:

  • diastolic - full

  • systemic - full

  • diastolic - empty

  • systemic - empty

Explanation

Question 5 of 15

1

On a hot summer day, Alex and Usman were frolicking in a water sprinkler which hit them with a gentle shower of water. Usman did not like Alex's comments about his favorite soccer team. He took off the sprinkler and blasted Alex's chest with water directly from the hose. If we consider the water impacts on Alex as like hydrostatic pressure impacts in blood vessels, then the sprinkler is like a(n) _____ and the hose is like a(n) ______

Select one of the following:

  • artery - arteriole

  • capillary - vein

  • capillary - artery

  • artery - capillary

Explanation

Question 6 of 15

1

which is a correct statement about the myocardium?

Select one of the following:

  • the intercalated discs allow for both intracellular but not extracellular fluid movement

  • extracellular calcium enters to bind to voltage-gated channels of the SR

  • contraction occurs due to the binding of calcium to troponin

  • the myofibers are fully linear like skeletal myofibers

Explanation

Question 7 of 15

1

which is a correct order of actions for a single cardiac cycles (NOTE: immediately adjacent is not required; B-E is acceptable)

Select one of the following:

  • right atrium contracts bottom to top - bundles of His conduct AP - left ventricle contracts

  • left atrium contracts top to bottom - right atria contracts - atrioventricular node activated

  • sinoatrial node activated - both ventricles contract - atrioventricular node activated

  • bundles of His conduct AP - ventricles contract bottom to top - atrioventricular node activated

Explanation

Question 8 of 15

1

During myocardial contraction, the level of calcium in the intracellular fluid is _____ and the calcium binds to ___ unique locations(s).

Select one of the following:

  • increasing - 1

  • unchanged - 1

  • increasing - 2

  • unchanged - 2

Explanation

Question 9 of 15

1

a decrease in the ____ results in a decrease in the _____

Select one of the following:

  • end systolic volume - hydrostatic pressure

  • arterial elasticity - stoke volume

  • arteriolar vasodilation - cardiac output

  • nitric oxide level - end diastolic volume

Explanation

Question 10 of 15

1

which is a correct match of extrinsic control and impact an arterioles near the liver?

Select one of the following:

  • epinephrine - vasodilation

  • angiotensin II - vasoconstriction

  • nitric oxide - vasoconstriction

  • endothelin-1 - vasoconstriction

Explanation

Question 11 of 15

1

If the ____ decreases, then the cardiac output can remain constant if the ______ increases

Select one of the following:

  • end diastolic volume - heart rate

  • heart rate - conduction velocity

  • end systolic volume - heart rate

  • all three statements are correct

Explanation

Question 12 of 15

1

which is a correct method to result in an increase end systolic volume?

Select one of the following:

  • hardening of the arteries

  • very large increase in the end diastolic volume

  • both statements are correct

  • neither statement is correct

Explanation

Question 13 of 15

1

Mrs. Flarplord Baggins redesigned Crabix to disrupt heart activity. The impacted hearts have a final "dub" but not further sounds are ever heart. Which is correct statement about Crabix could be impacting the heart?

Select one of the following:

  • it is impacting how electrical signals move from one cardiac cell to another

  • it is disrupting the activity of the atrioventricular node

  • both statement are correct

  • neither statement is correct

Explanation

Question 14 of 15

1

During a recent run together, Ms. Scarlet realized that Mr. Gray was having a hard time keeping up with her. They go to a clinic to get him checked out. The doctor listens to his heart and hears "lub shh dub". Which is a correct statement about Mr. Gray's heart?

Select one of the following:

  • he has damage to a semilunar valve

  • blood is back flowing into his ventricles

  • on the EKG, the "shhh" occurs before the T wave

  • all three statements are correct

Explanation

Question 15 of 15

1

Oh, No! an Anatomy lab accident cause you to be shrunk and transported into your lab partner's circulatory system. Fortunately, you were wearing your night vision goggles when the accident occur. Consequently, you are able to see that you are in a vessel where you are not having your position changed very quickly and can see skeletal myofibers through the wall of the vessel. You correctly determine that you

Select one of the following:

  • have been shrunk to smaller than a red blood cell

  • are not going to have to worry much about being banged against the vessel walls by the current

  • both statements are correct

  • neither statement is correct

Explanation

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