Muscle Histology Flashcards
A muscle _______is a cell, while muscle ________ and muscle ________ are structures within the cell.
Fiber
Fibril
Filament
What are the histology names for muscle fibers, fibrils, and filaments?
Myofiber
Myofibril
Myofilament
Muscle forms the flesh of the body, and over __% of body weight
40%
Muscle is specialized for ________.
Contraction
Muscles transform _____ into mechanical _______.
ATP
Energy
What are the 4 functions of skeletal muscle?
Create movement
Stabilize joints
Maintain posture
Create heat
In embryo, ________ elongate and fuse together
myoblasts
Nuclei in muscle cells are pushed to the side by many ________ proteins.
Contractile proteins
Postnatally, muscles increase in ________, not _______.
Size
Number
What is the plasma membrane of muscle cell?
Sarcolemma
What is the cytoplasm of a muscle cell?
Sarcoplasm
What two things of note are in sarcoplasm?
Glycogen
Myoglobin
What is myoglobin?
A red pigment that binds O2 until its needed
What CT surrounds a myofiber?
Endomysium
What CT surrounds a fascicle of fibers?
Perimysyium
What CT surrounds the whole muscle?
Epimysium
How is tendon formed?
All three of these CTs meet at the ends of muscles to form the tendon