Types and locations of connective tissues associated with skeletal muscle. *Endomysium- thin connective tissue that surrounds each individual muscle cell (fiber)
*Perimysium- Connective tissue that bundles muscle cells (between 10-100) into a fascicle.
*Epimysium- Outer fibrous connective tissue ...
Bio 201 Unit 3 Test Questions and
Correct Answers
Types and locations of connective tissues associated with skeletal muscle.
✅*Endomysium- thin connective tissue that surrounds each individual muscle cell
(fiber)
*Perimysium- Connective tissue that bundles muscle cells (between 10-100) into a
fascicle.
*Epimysium- Outer fibrous connective tissue wrapping that encloses all fascicles that
make up a muscle.
Define Fascicle: ✅Bundles of muscle cells whose arrangement affects appearance
and function of whole skeletal system.
Seven (7) criteria used to name muscles, & examples of each. ✅1. Location using
directional terms (anterior/posterior)
2. Body region or anatomical structures (Abdominus/oris)
3. Actions performed when contracted (flexors, extensors, ad/abductors, levators)
4.Fiber orientation (Rectus, oblique)
5. Shape (Deltoid, Rhomboid)
6. Size (Longus, Brevis)
7. Heads of Origin (Triceps, Biceps)
In addition to the voluntary movement of our skeleton, list at least six (6) other functions
of our skeletal muscles. ✅1. Contractions generate heat as a by-product
2. Contraction of diaphragm muscle vital function assoc with respirations.
3. Muscles attached to facial skin allow for facial expressions and nonverbal
communication.
4. Muscles in throat assist with swallowing
5. Stapedius modifies level of sound we perceive in ear
6. Sphincters allow control over openings and closings of body openings.
, Four (4) functional groups of skeletal muscle and give examples of each. ✅1. Agonists
(prime movers)- provide most force for a muscle action
2. Antagonists- On opposite side of bones and joint where they meet; modulation and
control of agonist movement.
3. Synergists- aid agonists supplying supplemental force, minimize unwanted
movement, help stabilize joints, provide for more efficient movement.
4. Fixators- Provide stabilizing for that anchors a bone. Provides movement efficiency
and protection from injury
Relationship between the origin and the insertion of a skeletal muscle ✅*Muscle origin
and insertion: Muscles being and end at district anatomical locations.
-Origin: Anchoring point of a bone; Where muscle originates from
- Insertion: Moving end of muscle whose tendon attaches to a bone or other structure.
Usually far side of joint.
Compare and contrast the basic characteristics of skeletal, cardiac, and smooth muscle.
✅Skeletal: *Made of long muscle cells parallel to one another
*Some long extending entire length of muscle
*Multinucleated cells
*Contractions are voluntary/controlled
*know as fibers due to length and appearance
Cardiac: *Only found in the heart
*Short cells/highly branched, has 1 or 2 nuclei
*Contain gap junctions & desmosomes
*Contraction is involuntary or not controlled
Smooth: *Found in eye, skin, grandular ducts
*only one without striations
*Long and flat with spindle shaped pointed ends
*Single centrally located nucleus
*Contractions are involuntary
*Linked by gap junctions allow synchronized contraction
Five (5) properties of muscle cells. ✅*Contractibility
*Excitability
*Conductivity
*Extensibility
*Elasticity
Structural elements common to all types of muscle cells. ✅(Muscle Cells Called
Myocytes)
-Sarcoplasm is the cytoplasm
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