Lecture 26 Flashcards
1
Q
Why do we need cardiac muscle?
A
To pump blood
2
Q
Why do we need smooth muscle?
A
To control the movement of fluids
3
Q
Why do we need skeletal muscle?
A
- To move
- To maintain posture
- To generate heat
4
Q
What is the general structure of skeletal muscle from large to small?
A
- Muscle
- Muscle bundles
- Muscle fibre/cell
- Myofibril
- Sarcomere
- Myofilaments
5
Q
What is in the muscle fibre?
A
- Sarcolemma (membrane)
- Sarcoplasm
- Mitochondria
- T tubule
- Sarcoplasmic reticulum
6
Q
What is the thin filament called?
A
Actin
7
Q
What is the thick filament called?
A
Myosin
8
Q
What is skeletal muscle described as?
A
Striated
9
Q
What does a motor unit consist of?
A
One somatic Motor neuron
the muscle fibres innervated by its branches
10
Q
How many motor neurons innervate a muscle fibre?
A
only one
11
Q
How many muscle fibers does a neuron innervate?
A
many
12
Q
What is the key aspect about how many muscle fibers a neuron innervates?
A
Indicates the precision of function
