Sarcomeres and Calcium Signaling

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

Which channel is enriched in the junctional regions of the SR in cardiac muscle sarcomeres?

  • Ryanodine receptors (correct)
  • Na+ - Ca2+ antiporter
  • Sarcolemmal Ca2+ pump
  • Sarcoplasmic endoplasmic reticulum calcium-ATPase

What initiates the cross-bridge cycle in cardiac muscle?

  • Binding of troponin C to Ca2+ (correct)
  • Extrusion of Ca2+ from the cell
  • Influx of Ca2+ during an action potential
  • Ca2+ release from the SR

How is Ca2+ extruded from cardiac muscle cells?

  • By influx of Ca2+ during an action potential
  • Through the sarcolemmal Na+ - Ca2+ antiporter and sarcolemmal Ca2+ pump (correct)
  • Through the sarcoplasmic endoplasmic reticulum calcium-ATPase (SERCA)
  • By binding to troponin C

Flashcards are hidden until you start studying

More Like This

Muscle Physiology Overview
10 questions

Muscle Physiology Overview

InestimableTurquoise avatar
InestimableTurquoise
Cardiac Muscle Contraction: Sarcomere Steps
30 questions
C13- neural control of force
43 questions

C13- neural control of force

SplendidNovaculite8819 avatar
SplendidNovaculite8819
Use Quizgecko on...
Browser
Browser