ZuoTi.Pro
Question

Define chronotropy, inotropy, and lusitropy. Does b-adrenergic stimulation change chronotropy, inotropy and/or lusitropy...

Define chronotropy, inotropy, and lusitropy. Does b-adrenergic stimulation change chronotropy, inotropy and/or lusitropy in the myocytes of the left ventricle? If so, what is the direction of change and how does each change influence cardiac output? How is the b-adrenergic response similar to the response to elevated Ca2+ levels? How is the b-adrenergic response different from the response to elevated extracellular Ca2+?

science   nursing   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Inotropy : Strength and force of tension developed and velocity of shortening myocardial fibres at given preload and afterload is called inotropy.

Chronotrophy: Rate of myocardial muscle contraction is called chronotrophy.

Lusitrophy: When the actin and myosin binding breaks , relaxation of the heart Chambers occurs . The property of myocardial relaxation is lusitrophy.

The sympathetic nervous system influence the function of myocardium by stimuating via beta adrenergic receptors. Beta adrenergic stimulation play an important role in heart by increasing the heart rate ,increasing the heart's contractility .It changes the chronotrophy and inotrophy ,lusitrophy in the myocytes of left ventricle .Inotrophy and chronotrophy occurs in systolic activity and lusitrophy in diastole. Ventricular systolic function determines the  volume of blood pumped from the left ventricle per beat and depends on inotropy, love and chronotrophy.

0 0
Add a comment
Know the answer?
Add Answer to:
Define chronotropy, inotropy, and lusitropy. Does b-adrenergic stimulation change chronotropy, inotropy and/or lusitropy...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Please answer all questions. Thank You? 31) Sympathetic nerve stimulation and epinephrine heart activity. A) increase...

    Please answer all questions. Thank You? 31) Sympathetic nerve stimulation and epinephrine heart activity. A) increase B) decrease C) have no effect on D) The heart responds to hormones, but not to nerve stimulation. E) The heart responds to nerve stimulation, but not to hormones. 52) Rheumatic Tever is a bacterial disease that can result in degeneration of heart valves. That would cause A) slower heartbeat. B) uncoordinated attraction of ventricles. C) faster heart beat. D) backfire of blood from...

  • B. SHORT QUESTIONS Answer in the booklet provided. Ensure the correct numbering. A 2-lead electrocardiogram (ECG...

    B. SHORT QUESTIONS Answer in the booklet provided. Ensure the correct numbering. A 2-lead electrocardiogram (ECG) trace below shows a progressive prolongation of PR interval (more than 0.2 sec) which result in a dropped QRS complex. PR PR PR PR 1. Which pathophysiological condition does the ECG trace above represent? 2. Br-adrenegic receptor blocker reduces blood pressure by inhibiting both the chronotrophic (affecting the heart rate) and inotropic (affecting contractility) effects on the heart however also decrease the release of...

  • all question pls 1. Define GDP, Real GDP, and NDP 2. Explain the effect of change...

    all question pls 1. Define GDP, Real GDP, and NDP 2. Explain the effect of change in labor productivity and change in the exchange rate on the AD and SRAS curve. 3. Explain what factors can shift the AD curve and what can create a movement along the AD Curve? 4. Discuss what factors can shift the SRAS curve? 5. Can an increase in wage rate influence the SRAS curve? 6. Define CPI? How can you calculate inflation rate from...

  • How does the diaphragm work to change air pressure in the lungs, and as a result,...

    How does the diaphragm work to change air pressure in the lungs, and as a result, cause breathing? List the structures of the respiratory system in the order that they function for inhalation. Describe each structure’s function in detail. List the structures of the respiratory system in the order that they function for exhalation. Describe each structure’s function in detail. How is debris removed from the tracheobronchial tree? Define all pulmonary volumes and representative value for a healthy adult male....

  • Algebra of matrices. 3. (a) If A is a square matrix, what does it mean to say that B is an inverse of A (b) Define AT....

    Algebra of matrices. 3. (a) If A is a square matrix, what does it mean to say that B is an inverse of A (b) Define AT. Give a proof that if A has an inverse, then so does AT. (c) Let A be a 3 x 3 matrix that can be transformed into the identity matrix by perform ing the following three row operations in the given order: R2 x 3, Ri R3, R3+2R1 (i) Write down the elementary...

  • 1. Describe the 3 layers of pericardium. 2. Trace a drop of blood thru the heart....

    1. Describe the 3 layers of pericardium. 2. Trace a drop of blood thru the heart. 3. Explain how pressure changes influence valve positions for both AV valves and SL valves. 4. Define a pacemaker potential. How does it relate to an action potential for the intrinsic conduction system? 5. Follow the intrinsic conduction pathway and describe how the remaining 99% of the cardiac cells are stimulated. How is the action potential in the intrinsic cells different from the action...

  • the olfactory code for a single odorant is based on combinatorial input from multiple olfactory neurons:...

    the olfactory code for a single odorant is based on combinatorial input from multiple olfactory neurons: a) different sets of responding odorant receptors code for different chemicals but also for different concentration of the same chemical. how does lateral inhibition contribute to these differences? b) why do you think there is no apparent "logic" in the smell of similar vs dissimilar chemicals? c) would one chemical be coded by the same receptor combination in various animals? yes or no. explain...

  • Please answer 9&10 -10 C. Does this object ever change direction? If so, nt what time...

    Please answer 9&10 -10 C. Does this object ever change direction? If so, nt what time or times? 9. (4 pts) An airplane needs to reach a forward velocity of 203.0 km/h to take off. On a 2000-m runway, what is the minimum uniform acceleration (in m/s?) necessary for the plane to take light if it starts from rest? vertically upward over waterfalls as high as 3.6 m. a. With what minimum speed must a salmon launch itself into the...

  • What is the percentage change in the price of each of the three goods?

    What is the percentage change in the price of each of the three goods?b. Using a method similar to the consumer price index, compute the percentage change in the overall price level.c. If you were to learn that a bottle of Gatorade increased in size from 2011 to 2012, should that information affect your calculation of the inflation rate? If so,how?d. If you were to learn that Gatorade introduced new flavors in 2012, should that information affect your calculation of...

  • 7. DC maturation. a. How does the role of an immature to mature DC change? b....

    7. DC maturation. a. How does the role of an immature to mature DC change? b. What stimulates the change from an immature to a mature DC? c. What key molecules are up regulated during its maturation? d. What are the functions of these key molecules?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT