Flashcards in Cellular Architectue + Muscle Types Deck (23)
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1
What H and E stain for?
Nucleic acid and protein
2
Difference between preparation for L.M and E.M
LM - embed in wax + glass slide
EM - embed in plastic + copper grid
3
Connective tissue types
Adipose, bone, fibrous (tendon), loose (under skin)
4
Types of collagen
1. Dense irregular connective tissue (random bundle)
2. A ligament (right angles)
3. A tendon (cable)
5
Collagen polymerization occurs _____ of cell
Outside
6
Characteristics of epithelia
Linked tgt by junctions, little ECM, no blood vessels/ nerves
7
Differences in appearance between smooth, skeletal and cardiac muscle
Smooth- thin, many nuclei , non-striated
Skeletal- striated
Cardiac - striated -> special junctions + some binuclear cells
8
Skeletal muscle dimensions
length 1mm-30cm, diameter 100 microns
9
How do muscle fibres connect in skeletal muscle?
No cell to cell contact -> mechanical connection by associated connective tissue
10
S.R. in skeletal muscle
triad : 2 terminal cisternae + 1 T-tubule
11
Arrangement in S.R. of skeletal muscle
Fibres: many peripherally located nuclei + mitochondria
Contractile proteins: arrange in bundles
12
In skeletal muscle actin is anchored to
Z-line at 1 end
13
Smooth muscle dimensions
length - 0.2mm (10-600 microns), diameter 2-10 microns
14
Shape of smooth muscle
Spindle
15
How do muscle fibres connect in smooth muscle?
Electrically coupled by gap junctions -> little connective tissue
16
Nucleus + mitochondria in smooth muscle
Mononucleate - central location, few mitochondria compared to skeletal muscle
17
S.R. in smooth muscle
Poorly developed -> automatic innervation with plasmalemmal structures and no T-tubule system
18
Cardiac muscle dimensions
length 50-100 microns, diameter 10-20 microns
19
How are fibres connected in cardiac muscle?
Electrically coupled by specialed junctions
20
Features of cardiac muscle
1. Intercalated discs: desosomes + gap junctions
2. can be branched
3. can be binucleate - centrally located
21
S.R. in cardiac muscle
Lacks terminal cisternae but has T-tubule system - no defined triads
22
Contractile proteins in cardiac muscle
Arranged in branching myofibrilar network through cytoplasm
23
