BPK 105 Study Guide - Final Guide: Superior Vena Cava, Pulmonary Artery, Mitral Valve

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browncricket987

27 Apr 2018

School

Simon Fraser University

Department

Biomedical Physio & Kines

Course

BPK 105

Professor

Ryan Dill

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Modules 7 & 8 - Review Questions - Part 2

4. Trace the flow of blood through the heart. Specify the various chambers, valves, and

vessels and the function of each. Draw the approximate location of the sinoatrial (SA)

node and Atrioventricular (AV) node. [7 marks] (*note the information for this question is

contained in several figures throughout Chapter 12*)

- The right and left atria and ventricles of the heart contract simultaneously but flow of

blood will be described for the right side of the heart first.

- Through the inferior vena cava (blood from the body’s lower limbs, pelvis and

abdomen) and superior vena cava (blood from the body’s thorax, upper limbs, neck

and head), oxygen-poor blood reaches the right atrium of the heart. [systemic

circulation to right atrium]

- Flowing through the coronary sinus, blood from the heart muscle also reaches the right

atrium.

- As the right ventricle relaxes after the last contraction, the majority of the blood that

travels through the right atrium goes into the right ventricle.

- Before its relaxation phase ceases, the right atrium also contracts, causing sufficient

blood to be pushed into the right ventricle from the right atrium to fill the right ventricle.

- Right ventricular contraction initiates after contraction of the right atrium. As the right

ventricle contracts, blood is pushed against the tricuspid valve; as a result, this valve is

closed.

- The pulmonary semilunar valve is then opened once the pressure in the right ventricle

rises, and blood travels through the pulmonary trunk. This pressure quickly decreases

once the right ventricle relaxes.

- At this point, the pressure in the right ventricle is lower than the pressure in the

pulmonary trunk. The pulmonary semilunar valve then closes as a result of the backflow

of blood.

- The left and right pulmonary arteries, which are both branches of the pulmonary trunk,

transport blood to the lungs.

- Blood then flows from the lungs to the left atrium and then the pulmonary veins.

- The majority of the blood that travels through the left atrium goes into the left ventricle.

- As the left ventricle relaxes after the last contraction, the majority of the blood that travels

through the left atrium goes into the left ventricle. Before its relaxation phase ceases, the

left atrium also contracts, causing sufficient blood to be pushed into the left ventricle from

the left atrium to fill the left ventricle.

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Document Summary

Modules 7 & 8 - review questions - part 2: trace the flow of blood through the heart. Specify the various chambers, valves, and vessels and the function of each. Draw the approximate location of the sinoatrial (sa) node and atrioventricular (av) node. [7 marks] (*note the information for this question is contained in several figures throughout chapter 12*) The right and left atria and ventricles of the heart contract simultaneously but flow of blood will be described for the right side of the heart first. Through the inferior vena cava (blood from the body"s lower limbs, pelvis and abdomen) and superior vena cava (blood from the body"s thorax, upper limbs, neck and head), oxygen-poor blood reaches the right atrium of the heart . Flowing through the coronary sinus , blood from the heart muscle also reaches the right atrium.

Related Questions

1) The external layer of the heart wall is the

Multiple Choice

endocardium.

myocardium.

epicardium.

parietal pericardium.

2) Check all that are characteristics of cardiac muscle.

Check All That Apply

Cells are long and cylindrical.

Cells are short and branching.

Cells have multiple nuclei at the periphery of the cell.

Cells have one or two nuclei in the center of the cell.

They are composed of thick and thin filaments.

The functional contractile unit is the sarcomere.

3) Match the chamber of the heart with the structure(s) from which it receives blood.

Coronary sinus

Pulmonary veins

Right atrium

Left atrium

Match each of the options above to the items below.

Right atrium

Right atrium Open choices for matching

Right ventricle

Right ventricle Open choices for matching

Left atrium

Left atrium Open choices for matching

Left ventricle

4) The less extensive distribution of T-tubules contributes to the more delayed onset and prolonged contraction of cardiac muscle tissue compared to skeletal muscle tissue.

True or False

5) The cells of the ___________ act as the heart's pacemaker, which establishes the pace for cardiac activity.

Multiple Choice

atrioventricular (AV) node

sinoatrial (SA) node

atrioventricular (AV) bundle

Purkinje cells

6) Match the cardiac vein with its description.

Travels close to the right marginal artery

In posterior interventricular sulcus

In anterior interventricular sulcus

In the posterior portion of cornary sulcus

Match each of the options above to the items below.

Great cardiac vein

Great cardiac vein Open choices for matching

Middle cardiac vein

Middle cardiac vein Open choices for matching

Small cardiac vein

Small cardiac vein Open choices for matching

Coronary sinus

7) Parasympathetic innervation to the heart comes from the medulla oblongata via the left and right ___________ nerves.

8) Check all that are components of the sympathetic innervation of the heart.

Check All That Apply

Cervical sympathetic ganglionCervical sympathetic ganglion

Spinal cordSpinal cord

Vagus nerve (CN X)Vagus nerve (CN X)

Cardiac nerveCardiac nerve

Sympathetic postganglionic axon

9) Check all that occur during ventricular contraction.

Check All That Apply

The AV valves open to allow blood to enter the ventricles from the atria.The AV valves open to allow blood to enter the ventricles from the atria.

The semilunar valves remain closed to prevent backflow of blood into the ventricles.The semilunar valves remain closed to prevent backflow of blood into the ventricles.

The semilunar valves open to allow blood to flow into the large arteries.The semilunar valves open to allow blood to flow into the large arteries.

The AV valves close to prevent backflow of blood into the atria.

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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BPK 105 Study Guide - Final Guide: Superior Vena Cava, Pulmonary Artery, Mitral Valve

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