15-7-14 Flashcards
1
Q
WHat are the characteristics of skeletal muscle?
A
- Irritability
- contractibility
- extensibility
- we can lengthen it, passivily
- elasticity
- when we streatch it it goes bac
2
Q
What are the importacne of skelele muscle?
A
- Movement
- supporting posture
- breathing.
3
Q
What is somites
A
first development
- masses of primitive cells formed from paraxial mesoderm on either side of neural tube, they will become *determined *a muscle tissue.
- developed rostral to caudal
- all skeletal muscle come from somotes (except head)
4
Q
Describe the early development of skeletal muscle and nerve input.
A
- Myogenesis- development of muscle cells
- **Axonal outgrowth **
-
- as muscles develops axons have to find the skeletel muscle,
-
Snapyogenesis- development of a syapse
- at first acy as all along hte
- **Synapse elimination **- embyonicaly there are multiple synapse.
LO 1
5
Q
What are the steps in somite differentiation?
A
6
Q
Myogenic Progenitor cells
A
- cells migrate and proliferate–> muscles specific genes turn on–> regulate muscles development. –> make muscle differentiation factors (MRF)
- muscle differentation factors drie
7
Q
Myogennesis
A
- Undifferentiated cells of somites–> MyoD or Myf 5
- committed myoblasts ((Primitive single-cells mononucleated precursor cells)
- have to become muscle cells no going back
- myotube–> myo
8
Q
Satelite cells
A
- cells that withdraw form cells cycle and become
9
Q
List and describe components of skeletal muscle structure.
A
L.O. 2
10
Q
Describe the mechanical components of the sliding filament theory.
A
L.O. 3
11
Q
List and describe the steps in excitation-contraction coupling.
A
L.O. 4
12
Q
- List and describe types of muscle contraction.
A
L.O. 5
13
Q
Compare and contrast characteristics of the three types of muscle fibers.
A
L.O. 6
14
Q
- Describe the components of muscle architecture that affect function.
A
L.O. 7
15
Q
- List and describe the factors that influence force production. 1
A
L.O. 8
