Histology (Alb) Lecture 5 - Exam 2
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Created by Marissa Alvarez
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Muscle Tissue
Main Function?
Terminology?
Muscle Types
SKELETAL MUSCLE
weak or strong?
fast or slow?
discontinuous or continuous?
voluntary or involuntary?
Muscle Types
CARDIAC MUSCLE
weak or strong?
fast or slow?
discontinuous or continuous?
voluntary or involuntary?
Muscle Types
Smooth Muscle
weak or strong?
fast or slow?
voluntary or involuntary?
Development of skeletal muscle fibers
Satellite cells?
Muscle Tissue
Endomysium?
Perimysium?
Epimysium?
Organization of skeletal muscle
What does each black box represent?
Depiction of Muscle FIBER
Organization of skeletal muscle:
What does each arrows indicate?
Skeletal muscle banding pattern in H&E histological section:
What does each black box represent?
Myosin = Thick Filament
Actin = Thin Filament
Z line to Z line = Sarcomere
(H is in middle of A)
(Z is in middle of I)
Changes in widths of bands during contraction:
What does the contracted state look like for I,Z, A, & H?
Changes in widths of bands during contraction:
What does the relaxed/rest state look like for I,Z, A, & H?
Changes in widths of bands during contraction:
What does the stretched state look like for I,Z, A, & H?
What is two elements are involved in contraction?
Distance actin filaments can travel?
How many cycles are necessary for full contraction?
What membrane system controls contraction?
How does it regulate contraction?
Where is calcium stored?
What are T-tubules?
At what junction do T-tubules occur at?
What two elements do T-tubules form triads with (HINT: two of the same thing)?
Where are triads located in frogs?
In humans?
Neuromuscular junction:
What two main steps occur at the neuromuscular junction?
What is indicated by the arrows and what is located here that is involved in the neuromuscular junction?
What fibers are involved with the cardiac muscle and conduction system?
Compare Skeletal & Cardiac muscle Tissues:
Fiber characteristics (2 things to compare)?
Nuclei characteristics?
Innervation?
What are the arrows pointing at?
What are the arrows pointing at?
Cardiac muscle: Intercalated disk
What do the blue boxes represent?
Cardiac muscle T-tubule system:
Can you identify all of the filling in the picture?
Smooth Muscle
Voluntary or involuntary?
Controls?
Found?
What is type of muscle tissue is shown?
Smooth muscle ultrastructure
What is indicated at the arrows?
(all the same thing at white arrows)
Smooth muscle contraction
Relaxed form?
(surrounded by?)
Smooth muscle contraction
Contracted form?
(Surrounded by?)
What type of muscle tissue is this?
What is the arrow and black box indicating?
EXAM Question:
Identify this tissue
A. Skeletal Muscle
B. Connective Tissue
C. Cardiac Muscle
D. Smooth Muscle
