ESS 345 EXAM 1 QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS GUARANTEED PASS
What are the 3 types of muscle?
Skeletal, cardiac, smooth
Striated, tubular and multi-nucleated, voluntary, location:leg (what type of muscle?)
Skeletal Muscle
Non-striated, spindle-shaped, and uninucleated, involuntary, location:intestines (what type of muscle?)
Smooth muscle
Striated, branched and uninucleated, involuntary, location:heart (what type of muscle?)
Cardiac muscle
What are the layers of skeletal muscle? Outermost to innermost
Epimysium, Perimysium, Endomysium
Connective tissue surrounding muscle?
Epimysium
Surrounds fasicles (bundles of muscle fibers)?
Perimysium
Surrounds individual muscle cells?
Endomysium
,Smallest contractile unit of muscle?
Sarcomere
"lemma" means?
cell membrane
-fuses with tendon
-conducts action potential (for contractions)
-maintains pH, transports nutrients
Plasmalemma
-involved in muscle growth and development
-aids response to injury, immobilization, training
(Satellite cells become new nucleuses)
(skeletal muscle=multi-nucleated)
Satellite Cells
cytoplasm of muscle cell is?
Sarcoplasm
What are the jobs of sarcoplasm?
Glycogen storage, glycolysis enzymes, myoglobin
extension of plasmalemma, that carry action potential deep into muscle fibers?
Transverse tubules (T-tubules)
What is the sarcoplasmic reticulum's (SR's) job?
, Ca^2+ storage (Calcium)
Myofibrils are made of what?
actin and myosin
Actin characteristics?
-outside strands (red in picture)
-actin contains myosin-binding site
-deals with tropomyosin and troponin
Tropomyosin does what?
covers active myosin binding site at rest
Troponin does what?
once calcium binds troponin moves tropomyosin to bind actin and myosin
Myosin characteristics? (blue on picture)
-has a head to bind with actin
-heads will interact with actin filaments for contraction
Titan characteristics? (black squiggly line on picture)
-prevents overstretching
-increases muscle force (Ca+ binds to titan too)
-stabilizes sarcomere and centers myosin
-one of the largest proteins discovered
*______ _______ is an alpha-motor neuron and all fibers that it innervates.
COMPLETE SOLUTIONS GUARANTEED PASS
What are the 3 types of muscle?
Skeletal, cardiac, smooth
Striated, tubular and multi-nucleated, voluntary, location:leg (what type of muscle?)
Skeletal Muscle
Non-striated, spindle-shaped, and uninucleated, involuntary, location:intestines (what type of muscle?)
Smooth muscle
Striated, branched and uninucleated, involuntary, location:heart (what type of muscle?)
Cardiac muscle
What are the layers of skeletal muscle? Outermost to innermost
Epimysium, Perimysium, Endomysium
Connective tissue surrounding muscle?
Epimysium
Surrounds fasicles (bundles of muscle fibers)?
Perimysium
Surrounds individual muscle cells?
Endomysium
,Smallest contractile unit of muscle?
Sarcomere
"lemma" means?
cell membrane
-fuses with tendon
-conducts action potential (for contractions)
-maintains pH, transports nutrients
Plasmalemma
-involved in muscle growth and development
-aids response to injury, immobilization, training
(Satellite cells become new nucleuses)
(skeletal muscle=multi-nucleated)
Satellite Cells
cytoplasm of muscle cell is?
Sarcoplasm
What are the jobs of sarcoplasm?
Glycogen storage, glycolysis enzymes, myoglobin
extension of plasmalemma, that carry action potential deep into muscle fibers?
Transverse tubules (T-tubules)
What is the sarcoplasmic reticulum's (SR's) job?
, Ca^2+ storage (Calcium)
Myofibrils are made of what?
actin and myosin
Actin characteristics?
-outside strands (red in picture)
-actin contains myosin-binding site
-deals with tropomyosin and troponin
Tropomyosin does what?
covers active myosin binding site at rest
Troponin does what?
once calcium binds troponin moves tropomyosin to bind actin and myosin
Myosin characteristics? (blue on picture)
-has a head to bind with actin
-heads will interact with actin filaments for contraction
Titan characteristics? (black squiggly line on picture)
-prevents overstretching
-increases muscle force (Ca+ binds to titan too)
-stabilizes sarcomere and centers myosin
-one of the largest proteins discovered
*______ _______ is an alpha-motor neuron and all fibers that it innervates.
