Bigger muscle cells use more calories — 24/7 — than
small muscle cells.
Not exact matches
Figuring out how blank slate stem
cells decide which kind of
cell they want to be when they grow up — a
muscle cell, a bone
cell, a neuron — has been no
small task for science.
Common wisdom in this field had held that the endothelial
cells must help immune
cells squeeze through by contracting themselves like
small muscles, but the present study found no evidence for such contraction - based help.
Researchers could, in theory, fix genetic malfunctions in the induced pluripotent stem
cells derived from a patient and then grow
small patches of completely healthy
muscle.
For example, a study in Oman found that very
small doses injected into the skin work almost as well as the usual, larger dose injected into
muscle, because skin is teeming with immune
cells (The New England Journal of Medicine, vol 351, p 2286).
But with this technique, we can just take a
small sample of non-
muscle tissue, like skin or blood, revert the obtained
cells to a pluripotent state, and eventually grow an endless amount of functioning
muscle fibers to test.»
«Even in mice with only a
small percentage of corrected
cells, we saw widespread and progressive improvement of the condition over time, likely reflecting a survival advantage of the corrected
cells and their contribution to regenerating
muscle.»
The sodium channel lies on the surface of the nerve and
muscle cells and is composed of a large molecule called the α - subunit, together with
smaller β - subunit molecules.
«
Cells contain a
small pool of soluble cardiac troponin, but the majority is bound to heart
muscle filaments.
The
muscle fibers they created were uniformily
muscle cells, but the fibers were still
smaller than those found in real human
muscle.
Evolution
Small peptides known as selective androgen receptor modulators, or SARMs, increase the sensitivity of
muscle cells to natural steroid hormones — with fewer undesirable side effects than traditional steroids.
Perivascular
cells, including pericytes in the
smallest blood vessels (e.g., microvessels) and ARCs around larger ones, express mesenchymal stem
cell markers and bear a multi-differentiation fate potential (differentiate into osteoblasts, chondrocytes, adipocytes, smooth
muscle cells and myocytes) similar to that documented for MSCs in vitro.
Finally, we show that addition of
small molecule inhibitors of eIF2α dephosphorylation to
muscle stem
cell cultures permits their ex vivo expansion and engraftment into a preclinical mouse model of Duchenne muscular dystrophy.
Within a hair follicle, there are stem
cells that reside in an area called the hair follicle «bulge,» which is a
small compartment located where the outer root sheath meets the arrector pili
muscle (see Hair Follicle figure).
Celltex charges $ 6,500 to remove mesenchymal stem
cells — adult
cells that can morph into
muscle, bone, cartilage and fat
cells — from a
small piece of fat it removes from patients» stomachs.
The placenta also contains
small amounts of oxytocin which eases birth stress and causes the smooth
muscles around the mammary
cells to contract and eject milk.
On the other hand, insufficient hydration results in reduced amount of water in our
muscle cells and they appear flabby and
smaller although no
muscle mass has been lost.
Proteins could be a
small source if you eat more than required to maintain
cell repairs and building new
muscle.
See,
muscles can become
smaller and weaker with age (a process known as sarcopenia), and evidence suggests that a key part of the decline occurs in this mitochondria, a component of
muscle cells that is the ultimate powerhouse — the primary engine of energy production.
It provides a source of amino acids,
small subunits that your
cells utilize to maintain your
muscle mass, make hormones, support nervous system function and keep your tissues strong and healthy.
A
small amount of calcium is also found in
muscle and blood
cells, where it plays several important roles:
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The reason more mitochondria don't always mean that you run faster (instead of longer) is because (1) you may have far more mitochondria than necessary to process the maximum amount of oxygen your lungs can take in and your red blood
cells transport at any given time, (2) regardless of how many mitochondria you have, the motor neurons connected to your aerobic
muscle fibers are
smaller than those connected to your anaerobic
muscle fibers.
The other is myoglobin, a
smaller but similar molecule that stores oxygen within its
muscle and heart
cells.
The heart
muscle has become so thickened that the left ventricle chamber is too
small to allow an adequate amount of blood to flow into it (diastole) before it contracts (systole) and perfuses the
cells of the body.