Exam (elaborations)
physio ex6 test 2 questions and answers rated A+ 2024/2025
- Course
- Institution
physio ex6 test 2 questions and answers rated A+ 2024/2025
[Show more]
Content preview
physio ex6 test 2People with weakened hearts need to allow max time for venous return and increased SV and
would benefit from - ANSincreased force of contraction and decreased heart rate
The ion that had the most pronounced effect on heart rate was - ANSpotassium.
Where in the cardiac muscle cell is most of the sodium normally found? - ANSoutside the cell
Which of the following is true of epinephrine? - ANSIt increases the heart rate and mimics the
sympathetic nervous system.
Norepinephrine affects the heart rate by - ANSincreasing the rate of depolarization and
increasing the frequency of action potentials.
The cardiac muscle is capable of which of the following? - ANSautorhythmicity
Phase 2 of the cardiac action potential, when the calcium channels remain open and potassium
channels are closed, is called the - ANSplateau phase
Which of the following is true of the cardiac action potential? - ANSThe cardiac action potential
is longer than the skeletal muscle action potential.
The main anatomical difference between the frog heart and the human heart is that the frog
heart has - ANSa single, fused ventricle.
Which of the following statements about contractile activity is true? - ANSThe smaller waves
represent the contraction of the atria
During which portion of the cardiac muscle contraction is it possible to induce an extrasystole -
ANSduring relaxation
The amplitude of the ventricular systole did not change with the more frequent stimulation
because - ANSa new contraction could not begin until the relaxation phase
Which of the following do you think contribute to the inability of cardiac muscle to be tetanized? -
ANSthe long refractory period of the cardiac action potential
Given the function of the heart, why is it important that cardiac muscle cannot reach tetanus? -
ANSThe ventricles must contract and relax fully with each beat to pump blood.
An extrasystole corresponds to - ANSan extra ventricular contraction
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller AllLegitExams. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77858 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now