Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
Name and describe three muscle types.
|
•Skeletal muscle- straitied; voluntary; multinucleated
•Smooth muscle –non striated; involuntary, visceral organs, spindle shaped •Cardiac muscle – striated; incalulated discs; branching cells |
|
Skeletal muscle
|
straitied; voluntary; multinucleated
|
|
Smooth muscle
|
non striated; involuntary, visceral organs, spindle shaped
|
|
Cardiac muscle
|
striated; incalulated discs; braching cells
|
|
Explain voluntary muscle contraction in terms of initiation, fiber response, muscle group action, and
actual physical response.(Cellular Level) |
Neuromuscular junction, SR response release, Ca ions from T tubules; Sliding Filament Theory;
|
|
Explain voluntary muscle contraction in terms of initiation, fiber response, muscle group action, and
actual physical response.Muscle Group |
Twitch - Trepp, wave summation, tetanous
|
|
isometric
|
increased muscle tension without
shortening of sarcomere |
|
isotonic
|
shortening of sarcomere without
increased muscle tension |
|
Describe the microscopic anatomical arrangement of muscle tissue.
|
Sarcomere, Z-disk, moycin (thick) and action (thin)
|
|
Describe the physiologic or metabolic function of muscle tissue.
|
Requirements - ATP and Ca ions
|
|
Supply of ATP
|
3 Sources - Ox phosphorylation (myoglobin), phosphagen system, Lactic Acid (muscle fatigue)
|
|
Neuromuscular junction
|
region where motor neurons comes into close contact with a skeletal muscle cell.
|
|
Sarcoplasmic Reticulum
|
an elaborate smooth endoplasmic reticulum;
involved in producing the energy used during muscle contraction Major role of the SR is to regulate intracellualar levels of CA++ |
|
T Tubles
|
increases the muscle fibers surface area
continuation of the sarcolemma; conduct impulsed to the deepest part of the muscle which signal the release of CA++ |
|
Sliding filament theory
|
during contraction the thin filament (Actin) slides past the Thick (Myosin) so that the actin and the myosin overlap to a greater degree
|