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the failure to deliver blood to the heart due to a narrowing of arteries results in __________.

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Related questions

Under normal conditions, healthy heart cells (cardiac myocytes)prefer fatty acids as their fuel which ultimately results in energy being generated from oxidative phosphorylation through the electron transport chain. We will talk about how fatty acids are oxidatively metabolized in lecture 10. The condition ischemic cardiomyopathy is a result of narrowing of heart arteries which leads to decreased blood flow and a decrease in oxygen delivery to the muscle cells of the heart. In the ischemic heart, metabolism shifts from fatty acid oxidation to glucose metabolism via glycolysis to generate ATP and supply energy needs. a) Please explain why the ischemic heart shifts from energy generated by fatty acids to energy generated by glucose. b) In the ischemic heart, an increase in glycolysis is not associated with an increase in glycolytic enzyme expression. What is the general means by which the increase in glycolysis is mediated if it is not via an increase in enzyme expression? c) In ischemic cardiomyopathy, the decreased blood flow to the heart results in a decrease in blood glucose moving through hart arteries. Given that glycolysis is increased in the ischemic heart, discuss two potential ways that heart cells can acutely (in a rapid time period) increase glucose levels to supply the increased demand for glycolysis.

Which one of the following IS NOT a function of the Human Circulatory System?

mounting a response to invading microorganisms
transporting hormones
nutrient transport
waste transport
wound clotting
urine transport

Which one of the following paths shows the correct pathway for blood in the blood vessels?

Arteries -> Veins -> Capillaries -> Venules -> Arterioles
Arteries -> Arterioles -> Capillaries -> Venules -> Veins
Capillaries -> Veins -> Venules -> Arterioles -> Arteries
Veins -> Venules -> Capillaries -> Arteries -> Arterioles

A Heart Murmur is a defect in one or more heart valves that permits a backflow of blood and reduces the Blood volume output of the Heart.

True
False

1. Which of the following is the correct sequence of bloodflow?

a. heart --> atery --> arteriole --> capillary -->vein --> venule --> heart

b. heart --> vein --> venule --> capillary -->arteriole --> artery --> heart

c. heart --> artery --> arteriole --> capillary -->venule --> vein --> heart

d. heart --> artery --> venule --> capillary -->arteriole --> vein --> heart

e. heart--> artery --> capillary --> arteriole -->venule --> vein --> heart

2. What are the functions of the elastic fibers that are foundin the walls of ateries? (there may be more than one answer)

Select one or more:

a. they allow the artery to stretch and then recoil back to itsoriginal shape as blood is forcegully pumped from the heart intothe arteries

b. they allow arteries to lengthen as the volume of blood in thearteries increase

c. they help maintain a steady blood pressure during thedifferent phases of heart contraction

d. they smooth out the walls of the arteries to preventturbulent blood flow

3. Which of the following are functions of the lymphatic system?(there may be more than one answer)

Select one or more:

a. help fight infections and cancer

b. allows excess interstitial fluid (fluid found between thecells in your tissues) to get dumped back into your blood

c. brings large molecules from fat digestion into thebloodstream so that they can be processed and stored

d. all of the above are functions of the lymphatic system

4. Which of the following blood vessels bring newly oxygenatedblood from the blood vessels in the lungs back to the heart so thatthe heart can pump it to the rest of the body?

Select one:

a. aorta

b. inferior vena cava

c. pulmonary vein

d. pulmonary artery

5. Which of the following mechanisms help blood fight gravity sothat, for instance, it can return from blood vessels in your feetback into your heart? (there may be more than one answer)

Select one or more:

a. breathing allows the pressure in your chest to decrease andallow blood to flow up towards your heart

b. as you walk, the skeletal muscles in your legs contract andsqueeze the veins; since veins have valves, blood flows up anddoesn't backflow back down

c. the force of blood flowing out of the heart and into thearteries pushes all of the blood along, causing blood to return tothe heart

d. precapillary sphincters open to allow blood to flow backtowards the heart

6. The tricuspid and bicuspid/mitral valves prevent backflow ofblood from the atria into the ventricles.

Select one:

True

False

7. The following sequence represents the correct order of bloodflow through the heart:

inferior and superior vena cava --> right atrium --> rightventricle --> pulmonary artery --> lungs --> pulmonaryvein --> left atrium --> left ventricle --> aorta

Select one:

True

False

8. Capillaries are as wide as one red blood cell.

Select one:

True

False

9. The purpose of the coronary arteries is to bring oxygenatedblood to the walls of the heart so that the muscles in the heartwalls can contract.

Select one:

True

False

10. Vasodilation refers to the narrowing of blood vessels.

Select one:

True

False

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