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2 Nov 2018

When blood enters the heart, it always first enters an atrium and then continues to a ventricle. Select one: True False

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Related questions

Match the part of the human heart with its function

Right ventricle

Left atrium

Left ventricle

Aorta

Pulmonary artery

Vena

Pulmonary veins
A.

Receives blood from the vena cava, delivers blood to the right ventricle.
B.

Blood enters this chamber via the right atrioventricular valve, delivers oxygen-poor blood to the lungs.
C.

Receives oxygen rich blood from the lungs, delivers blood immediately through the left atrioventricular valve.
D.

Receives blood from the left atium, delivers blood to the body via the aorta.
E.

Largest artery in the body.
F.

Delivers blood to the lungs from the right ventricle.
G.

There are actually two of these veins, superior and inferior.
H.

These veins have the highest concentration of oxygen in them and deliver blood back to the heart from the lungs.

Question 1

  1. A moderate increase in extracellular potassium will

Increase heart rate due to a more negative EK

Decrease heart rate due to a more negative EK

Increase heart rate due to a less negative EK

Decrease heart rate due to a less negative EK

Question 2

  1. Apply Atropin will directly

Decrease parasympathetic innervation and increase heart rate

Increase parasympathetic innervation and decrease heart rate

Decrease sympathetic innervation and increase heart rate

Increase sympathetic innervation and decrease heart rate

Frog ECG is recorded using

An electrical stimulator

Three wires including the one that is connected to the hook

A force transducer

Three wires and a force transducer

Question 4

  1. How would you differentiate atrial contractions fromventricular contractions?

A.

Observe the heart beating and tap the table to label it

B.

From the size of the contractions

C.

Correlate it with the electrical trace, if the electrical traceis typical.

D.

Both A and C

Question 5

  1. In this week's experiment, _________signal(s) will be recordedto study the frog cardiac functions.

mechanical (contractile)

electrical (ECG)

both mechanical and electrical

blood flow

Question 6

  1. In this week's experiment, the heart is hooked at the________

either atrium or ventricle

ventricle

atrium

sympathetic/increase

parasympathetic/decrease

Sympathetic/decrease

parasympathetic/increase

Question 8

  1. The frog heart can be slowed or stopped by over stimulation ofthe vagus nerve. When apply ACh to the heart, if the frog heartstop beating, you should

Wash the heart with warm Ringers

Apply a few drops of Isuprel

Massage the heart

All of the above

Observe the trace and do nothing

Question 9

  1. The pacemaker in the frog heart is the __________ and thepacemaker in the mammalian heart is the ________

AV, SA node

SV, SA node

SA, SV node

SA, SA node

Question 10

  1. Which of the following statements is TRUE regarding the frogheart

There is no autorhythmic cells found in the frog ventricle.

Oxygenated and deoxygenated blood are mixed completely insidethe frog ventricle

There are two atria and two ventricles.

Deoxygenated blood flows to the frog lungs and skin.

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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