Chapters 9 - 10 Flashcards
(19 cards)
Hierarchical organization of muscle
Whole muscle >
Muscle Fascicle> Muscle Fiber>
Myofibril> Myofiliment
Types of muscle tissue
Smooth, Cardiac, Skeletal
Functions of the muscular system (7)
Movement
Posture
Respiration
Body heat production
Communication
Constriction of organs and
vessels
Contraction of heart
What is a muscle fiber
A muscle cell
How long is a muscle fiber
the length of the muscle
Action Potential
Electrical activity conducted into a cell
What is the threshold for action potential
-55
What is depolarization
a change in the charge difference across the plasma membrane,
making the charge inside the cell more positive relative to the outside of cell.
Phases for Action Potential
(see photo for help)
- Resting phase
- Depolarization
- Repolarization
- Hyperpolarization
- Restoration
Presynaptic Terminal
axon terminal with synaptic vesicles containing the neurotransmitter acetylcholine
Synaptic cleft
space in between the presynaptic terminal and the muscle membrane
Postsynaptic membrane
motor end-plate
Hypertrophy
an increase in size of the muscle
atrophy
a- without
-trophy development
wasting away of a body part
tendonitis
inflammation of the tendon
Origin/
head ( -cep=head.. bicep=2 heads)
muscle end attached to more stationary of 2 bones
Insertion
muscle end attachment to bone with the greatest movement
Belly of muscle
Largest portion of the muscle between origin and insertion
4 muscle groups associated with rib cage
Scalenes
External Intercostals
internal intercostals
Diaphram
