Muscular System and Lymphatic & Immune System Flashcards
The origin is the part of the muscle that is
Stationary
The insertion is the part that is
Movable
Which is antagonistic to biceps brachii?
Triceps Brachii
Which muscles consists of intercalated discs
Cardiac
In what way are cardiac muscles and skeletal similar
both have striations
Which is true about the structure of smooth muscle
- overlapping pattern of actin
and myosin similar to
skeletal muscle - consist of an irregular arrangement of actin and myosin
- do not consist of actin or myosin
consists of an irregular arrangement of actin and myosin
Function of smooth muscles
- contract relatively fast and in a controlled manner
- contract relatively slowly in a controlled manner
- contract relatively slowly and in an uncontrolled manner
- contract with autorhythmicity
contract relatively slowly in a controlled manner
Myofibrils are composed of individual
myofilaments
Muscles are held in place and covered by
fascia
The functional unit of a muscle is
sarcomere
Thin filaments within a muscle fiber are called
Actin
This substance will cross the NMJ to communicate w/ individual muscle fibers
Acetylcholine
The energy source for muscle contractions is
ATP
The A band in a myofibril is an area of
thick filaments
A sarcomere is defined as the section of fiber between
Z lines