Unformatted text preview: Certain mesenchymal cells become myoblasts. These proliferate and fuse into
myotubes. Myotubes grow, add more myoblasts, and then differentiate to
produce multinucleated, muscle fibers which bundle together and make up a
(Connective tissue not shown.)
Fuse to form multinucleated structures
hypertrophy: pumping iron into ﬁbers
to make them grow!!!! But in HYPERPLAGIA,
times of intense exercise, satellite cells
add on to make muscle ﬁber GROW. So
Satellite cells used for REPAIR and GROWTH. Satellite cells are undifferentiated
cells, used only when repair is needed.
are undiff and assoc.
w/ ﬁber -- called
Satellite cell. They act
as "reserve" in case ﬁber
is damaged. Fig. 10-2 These cont. to diff.
further and become
more specialized -within a few days
they form MUSCLE
FIBER. Skeletal muscle fibers
each have multiple nuclei,
located near the cell membrane, or sarcolemma, and
the “sarcoplasm” shows
striations in longitudinal
sections. Each fi...
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This document was uploaded on 02/04/2014.
- Spring '14