Flashcards in Muscles 2 Deck (22):
What are the two classifications of muscle fibres?
What are the 2 types of oxidative fibres?
Mitochondrial levels in oxidative fibres?
Which of the two fibres are more vascularised
What is the diameter of oxidative fibres?
What is the function of slow oxidative fibres?
Relative ability to resist fatigue of fast ox fibres?
Mitochondrial levels in glycolytic fibres?
What do glycolytic fibres have a high number of?
- Glycolytic enzymes
Diameter of glycolytic fibres?
Relative ability to resist fatigue of glycolytic fibres
Where is smooth muscle found in the body?
- GI tract
What is smooth muscle controlled by?
Arrangement of actin and myosin in smooth muscle?
How are actin and myosin anchored to membranes in cardiac muscles?
What does calcium bind to when it is released from the sarcoplasmic reticulum in smooth muscle?
What does calmodulin bind to?
Myosin light chain kinase
What is the function of myosin light chain kinase?
Phosphorylates myosin using ATP
What enzyme allows relaxation?
Myosin light chain phosphatase
How does myosin light chain phosphatase work?
Dephosphorylates the myosin cross bridges, causing them to unbind
What does the action of myosin light chain kinase allow in regards to contraction in smooth muscle?