types of muscle Flashcards
What is the fibre appearance of skeletal muscle? (1)
Striated
How is skeletal muscle controlled? (1)
Conscious (voluntary) control
How are skeletal muscle fibres arranged? (2)
Regularly arranged;
So muscle contracts in one direction
What is the speed of contraction for skeletal muscle? (1)
Rapid
What is the length of contraction for skeletal muscle? (1)
Short
What is the structure of skeletal muscle fibres? (3)
Made of many muscle fibres with many nuclei;
Muscle fibres can be centimetres long;
Cross-striations (striped patterns) are visible under a microscope
What is the fibre appearance of cardiac muscle? (1)
Specialised striated
How is cardiac muscle controlled? (2)
Involuntary control;
Myogenic
How are cardiac muscle fibres arranged? (2)
Cells branch and interconnect;
Resulting in simultaneous contraction
What is the speed of contraction for cardiac muscle? (1)
Intermediate
What is the length of contraction for cardiac muscle? (1)
Intermediate
What is the structure of cardiac muscle fibres? (3)
Muscle fibres are connected by intercalated discs;
Low electrical resistance for easy passage of nerve impulses;
Muscle fibres are branched and uninucleated, about 1mm long
What is the fibre appearance of smooth muscle? (1)
Non-striated
How is smooth muscle controlled? (1)
Involuntary control
How are smooth muscle fibres arranged? (2)
No regular arrangement;
Allowing different cells to contract in different directions
What is the speed of contraction for smooth muscle?
Slow
What is the length of contraction for smooth muscle? (1)
Relatively long time
What is the structure of smooth muscle fibres? (3)
Muscle fibres are uninucleated;
Spindle-shaped with pointed ends; About 0.2mm long
