Log in
Biology
1
answer
0
watching
57
views

Identify the cardiac test that helps in evaluating cardiacchamber size; ventricular function; and disease of the myocardium,valves, cardiac structures, and pericardium.

Watch
1
answer
0
watching
57
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Jean Keeling
Jean KeelingLv2
28 Sep 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Molecular Cell Biology
8 Edition,
Lodish
ISBN: 9781464183393
Biology: Science for Life with Physiology
6 Edition,
Belk
ISBN: 9780134555430
Biology
2nd Edition, 2013
Openstax
ISBN: 9781947172517
Concepts of Biology
OER Edition,
Openstax
ISBN: 9781938168116
Essentials of Biology
5 Edition,
Mader
ISBN: 9781259660269

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.

Match the following terms describing the physical/mecahnical events with the correct phases of the cardiac cycle. Each phase may be used more than once.

- A. B. C. D.

All 4 cardiac valves are closed and all 4 chambers are relaxed during this phase.
- A. B. C. D.

The maximum amount of blood is in the ventricles at the end of this phase.
- A. B. C. D.

The pressure in the ventricles is higher than in the atria, but lower than in the arteries, during this phase.
- A. B. C. D.

The semilunar valves are open and the AV valves are closed during this phase.
- A. B. C. D.

The atria contract at the end of this phase.
- A. B. C. D.

The pressure in the ventricles is higher than the pressure in both the atria and the arteries during this phase.
- A. B. C. D.

Systole begins with this phase.
A.

isovolumetric relaxation
B.

ventricular ejection
C.

isovolumetric contraction
D.

ventricular filling

The first patient is a 39 year old male that presents to the ER with fatigue and shortness of breath. He has a heart rate of 133 bpm, 155/90 bp and a S2 associated with a harsh systolic ejection murmur. In addition he has hemoptysis and complains that his dyspnea is worse at night. He has bilateral rales and peripheral cyanosis. A chest x-ray demonstrates left ventricular hypertrophy.

2. The echocardiogram shows aortic stenosis, with calcification of the aortic valve and thickening of the left ventricular myocardium.

When does the aortic valve open? ___________

How would the valve problem change the cardiac output? ________________________

What has the heart done to improve cardiac output? ________________________

(Think in terms of CO = HR x SV)

3. This patient has increased pulmonary venous pressure of over 25 mm hg. Can you explain the hemoptysis and rales?

Why is it worse at night? (Unless he falls asleep watching TV, sitting upรขย€ยฆ.hint, hint)

Weekly leaderboard

Home
Homework Help 3,900,000
Biology 460,000
Start filling in the gaps now
Log in