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Test 2 - Muscle
Dr. Reel's muscle lecture
43
Histology
Professional
10/04/2011

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Term
Myofilaments
Definition
actin & myosin
Term
Myofibril
Definition
made up of sarcomeres
Term
Actin & Myosin
Definition
make up sarcomeres
Term
Muscle Fiber/Myofiber/Myocyte
Definition
muscle cell
Term
Sarcoplasm
Definition
cytoplasm of muscle cell
Term
Sarcoplasmic Reticulum
Definition
endoplasmic reticulum of muscle cell
Term
Sarcosomes
Definition
mitochondria of muscle cell
Term
Sarcolemma
Definition
muscle cell membrane
Term
Endomysium
Definition
surrounds invididual muscle fibers
Term
Perimysium
Definition
surrounds bundles of muscle fibers (fasicules)
Term
Epimysium
Definition
surrounds the entire muscle (bundles of fasicules)
Term
The associated CT of muscle is _____.
Definition
fibroblasts, collagen, reticular fibers, & ground substance
Term
The function of associated CT is _____.
Definition
connect muscle to bone, provide structure
Term
The functions of muscle are _____.
Definition
contraction: locomotion, peristalsis, parturition, pump blood, etc
Term
Smooth muscle functions in _____.
Definition
peristalsis, vascular system, parturition
Term
Smooth muscle is _____.
Definition
involuntary
Term
Smooth muscles are _____ to contract.
Definition
slow
Term
Smooth muscle cells are _____.
Definition
fusiform, spindle-shaped with tapered ends
Term
Smooth muscles have _____ nuclei that are _____.
Definition
single; central, fusiform
Term
The cytoplasm of smooth msucle cells are _____.
Definition
eosinophilic & homogenous
Term
Smooth muscle is _____.
Definition
not striated
Term
Skeletal muscle functions in _____.
Definition
chewing & locomotion
Term
Skeletal muscle is _____.
Definition
voluntary
Term
Skeletal muscle has a _____ rate of contraction.
Definition
fast
Term
Skeletal muscle cells are _____.
Definition
large, elongated with tapered ends
Term
Skeletal muscle cells have _____ nuclei that are _____.
Definition
many; oval & peripheral
Term
Skeletal muscle is _____.
Definition
striated
Term
The cytoplasm of skeletal muscle cells is _____.
Definition
eosinophilic & abundant
Term
The sarcomere consists of _____.
Definition
actin & myosin
Term
The A-band consists of _____.
Definition
actin & myosin
Term
The I-band consists of _____.
Definition
actin
Term
Cardiac muscle functions in _____.
Definition
blood circulation, heart contraction
Term
Cardiac muscle is _____.
Definition
involuntary
Term
Cardiac muscle is _____.
Definition
highly vascularized
Term
Cardiac muscle cells are _____.
Definition
elongated & branched
Term
Cardiac cells have _____ nuclei that are _____.
Definition
one (or two); oval & central
Term
Cardiac muscle cells have _____ cytoplasm.
Definition
eosinophilic
Term
Cardiac muscle is _____.
Definition
striated
Term
Only cardiac muscles have _____.
Definition
intercalated discs
Term
Gap junctions function in _____.
Definition
communication
Term
Desmosomes function in _____.
Definition
adhesion
Term
Intercalated discs function in _____.
Definition
lowered electrical resistance
Term
Purkinje cells function in _____.
Definition
conduction
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