QuestionSBA
QuestionChoice
Sarcolemmas are the plasma membrane of cardiomyocytes or skeletal muscle fibres.
10006696
a
Plasma membrane of the muscle
QuestionChoice
This is describing the thin actin filament in a myocyte.
10006697
b
Globular, double-stranded protein in a helical structure with a myosin-binding site
QuestionChoice
This is describing transverse-tubules in a myocyte.
10006700
e
Extensions of the cell membrane that penetrate to the centre of the myocyte
QuestionChoice
This is describing titin, which prevents muscle fibres from overstretching.
10006699
d
Responsible for the elasticity of muscle, allowing it to recoil to its normal form
QuestionChoice
This is describing the sarcoplasmic reticulum, which is a specialised form of endoplasmic reticulum necessary for muscle contraction and relaxation. Activation of the sarcoplasmic reticulum releases stored Ca2+ which binds to troponin and induces the actin-myosin complex.
10006698
c
Holds ATPase on its membrane and is dedicated to Ca2+ handling
Concept
Chapter
2693
4534
Myocytes
Topic
159
Cardiovascular physiology
13886
Which of the following best describes the sarcolemma of a cardiomyocyte?
a