General Characteristics of Muscle Skeletal Muscle
The -blank- acts as a membrane which encases each induvidual muscle fiber
Sarcolemma
When myosin & actin interdigitate, causing light and dark bands, the area between the Z lines where contraction occurs is called a -blank-
Sarcomere
When myosin & actin interdigitate, causing light and dark bands, the -blank- occurs where 2 sarcomeres adjoin.
Z line
When myosin & actin interdigitate, causing light and dark bands, the area where actin attaches, joining 2 sarcomeres, is called the -blank-
Z line
Myosin myofilaments are also referred to as
cross bridges
Cardiac muscle is also known as -blank-
heart muscle
When myosin & actin interdigitate, causing light and dark bands, light banks which only contain actin are called -blank-
l (1) bands
-blank- is the muscle structure that contracts
myofibrils
Myofibrils are found embedded/encased by the -blank- within a muscle fiber
sarcoplasum
Skeletal muscles make contact by -blank-
somatic nerves
The -blank- is the superficial most layer of a muscles anatomy that envelops the entire muscle.
the Epimysium which has a covering mechanism
Muscles cells are the -blank-
the smallest functional unit of muscle
Skeletal muscles attach to -blank- or -blank- by -blank-
to bone or cartilage by tendon
Smooth muscle, aka as involuntary, can are also be called -blank-
visceral
-blank- protein molecules make up thin myofilaments
Actin
What are the three component proteins found in the thin myofilaments
Actin, tropomyosin, troponon
There are 3000-blank- myofilaments within each myofibril
Actin/Thin
Smooth muscle make contact by -blank-
Autonomic nerves
Cardiac muscles are also known as
Branching, Striated and Involuntary
True or false? tropomyosin and troponin are component proteins found in the cross bridges or "thick" myosin myofilaments?
FALSE! Tropomyosin and troponin are component proteins found in the thin Actin myofilaments
True or false? Skeletal muscles do not vary in length.
False! Skeletal muscles make up 2/3 of all muscles in the body and vary in length
Groups of muscle fibers are known as
Fascicles
When myosin & actin interdigitate, causing light and dark bands, the place where only myosin is found, within the A band, is called the -blank-
H zone or H band
What is the rang in diameter of muscle cells?
1/10 to 1/100 of a mm
What is the range in length of a muscle cell?
1mm to 120 mm (2.5 in)
How many protein components do Actin myofilaments have?
3
Muscles make up -blank- % of a humans body weight
40
Muscle tissue is comprised of -blank- % water and the rest is protein
80
There are approximately -blank- muscles in the body
>500
When myosin & actin interdigitate, causing light and dark bands, dark bands where myosin and ends of actin overlap are called
A Bands
The connective tissue found in muscles that connects individual fiber is called
Endomysium
When myosin & actin interdigitate, causing light and dark bands, the center of the sarcomere, where no cross bridges are found is called the -blank-
M line
Muscle cells are synonymous to
Muscle fibers
-Blank- a muscle structure that runs the length of the fiber
Myofibrils
-Blank- are small strains of fibers found within 1 muscle fiber.
Myofibrils
Each muscle fiber has hundreds of thousands of -blank-
Myofibrils
-Blank- are even smaller unites or filaments, within myofibrils, that work to make muscles contract.
Myofilaments
-blank- protein molecules make up thick myofilaments
Myosin
There are 1500 -blank- myofilaments within each myofibril
Myosin
These two types of myofilaments (protein molecules) help muscles to contract.
Myosin and Actin filaments
Smooth muscles are also known as -blank- muscles
Non-striated/involuntary
-blank- is the membrane that encases groups of muscle fibers, known as fascicles, from each other.
Perimysium
2/3 of the muscles in the body are -blank- muscles
Skeletal muscles
What are the 3 types of muscles?
Skeletal, smooth and cardiac
These type of muscles are found in the stomach/digestive tract, intestines, blood vessels and iris of the eye what are they called?
Smooth, "visceral", muscles
Skeletal muscles contain -blank- that signal changes in -blank- and -blank-
Special sense organs that signal changes in length and tension.
Skeletal muscles are also known as -blank- muscles
Striated/Voluntary
