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