Muscle tissue Flashcards
1
Q
Special characteristics of muscle tissue
A
Excitability
Contractility
Extensibility
Elasticity
2
Q
Functions of Muscle tissue
A
Movement
Posture
Generating Heat
Stabilize Joints
3
Q
Plasma Membrane
A
Sarcolemma
4
Q
Type I Muscle fibers
A
Slow Red Oxidative Many mitochondria Lots of myoglobin Aerobic oxidative Slow continuous contractions over long periods of time
5
Q
Type IIa Muscle fibers
A
Fast Intermediate Oxidative Glycolytic Many mitochondria Lots of mitochondria Lots of myoglobin and glycogen Oxidative met. and anaerobic glycolysis Rapid contractions, short burst of energy
6
Q
Type IIb Muscle fibers
A
Fast White Glycolytic Fewer mitochondria Fewer myoglobin LOTS of Glycogen Anaerobic glycolysis Rapid contractions that fatigue quickly
7
Q
Sarcoplasmic reticulum
Job
A
Take up, store, release calcium ions
8
Q
Muscle from big to little
A
Muscle fascicle Muscle fibers Myofibril Myofilament Sarcomere
9
Q
Triad
A
2 cisternae and 1 t-tubule
10
Q
Cisternae
A
Expanded Sarcoplasmic reticulum near T tubule
11
Q
Cardiac muscle is separated by
A
intercalated disks
12
Q
Cardiac muscle vs skeletal Mitochondria T tubules Sarcoplasmic reticulum Terminal cisternae Triad
A
Functional syncytium Large mitchondria One T tubule per Sarcomere at Z line vs two at AI junctions Simple sarcoplasmic reticulum vs complex small terminal cisternae vs large diad with t-tubule vs triad
13
Q
Intercalated discs are made of
A
Fascia Adherens
Desmosome (macula adherens)
Gap junction
14
Q
Fascia Adherens
type of junction
what does it link
A
anchoring junction
links actin
15
Q
Desmosome (macula adherens)
A
Anchoring junction
links intermediate filaments
