Fill in the Blanks with Correct Structure of Skeletal Muscle Flashcards

Human physiology 

81 cards   |   Total Attempts: 182
  

Cards In This Set

Front Back
Typically, both ends of skeletal muscleare connected to bone. Muscles areconnected to bone through___Exceptions include the skeletal musclesthat are attached to facial skin.
.tendons
Skeletal muscle contains many ____, whichare supported by layers of connective tissue.As you probably expect, skeletal muscle alsocontains blood vessels and nerves.
. fascicles
The fascicles contain many muscle cells called ___
.(muscle fibers).
____often run the length of themuscle tissue. Note, this is much longer thanmost cells. Each muscle fiber contains manynuclei and mitochondria.
.Muscle fibers
The plasma membrane is called the ___
.sarcolemma.
In specific regions, the sarcolemma foldsinward and tunnels deep into the interior ofthe fiber forming___
.transverse tubules or Ttubules
The cytoplasm of the muscle fiber is called the___
. sarcoplasm
How does the anatomy of the muscle fiberrelate to its function? For example, the sarcolemma of the musclefiber propagates ___ as occurs inneurons.
.action potentials
Under the microscope, skeletal muscle (andcardiac muscle) appear striped or striated. This striated appearance is due to the orderlyarrangement of ____ inside the myofibrils.
.myofilaments (myosin andactin proteins)
Myofibrils are composed of many repeatingunits called _____
. sarcomeres
Each sarcomere is bordered by the ___ Inthe middle of each sarcomere is the M line.
. Z lines
Under a microscope, a sarcomere has distinctlight and dark regions.1. The ___ is the darkest region2. The __ is a lighter region in the centerof the A band3. The ___ is the brightest region
1. A band (A is foranisotropic).2. H zone (H is for Heller which is "light" in German)3.I band (I is forisotropic).
The contractile elements of the muscle fiberare the myofilaments.
.
Thin filaments are called ___ which areattached at the Z line.
.actin,
Thick filaments are called ___ which areattached at the M line.
.myosin,