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Smooth muscle cells. A smooth-muscle cell is a spindle-shaped myocyte with a wide middle and tapering ends, and a single nucleus. Like striated muscle, smooth muscle can tense and relax. In the relaxed state, each cell is 30–200 micrometers in length, some thousands of times shorter than a skeletal muscle cell. [ 1 ]
Muscle fatigue is not the same as muscle weakness, though weakness is an initial symptom. Despite a normal amount of force being generated at the start of activity, once muscle fatigue has set in and progressively worsens, if the individual persists in the exercise they will eventually lose their hand grip, or become unable to lift or push with ...
TH. H2.00.06.1.02001. FMA. 61803. Anatomical terminology. [ edit on Wikidata] A neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber. [ 1 ] It allows the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction.
4879 18158 Ensembl ENSG00000120937 ENSMUSG00000029019 UniProt P16860 P40753 RefSeq (mRNA) NM_002521 NM_001287348 NM_008726 RefSeq (protein) NP_002512 NP_002512 NP_001274277 NP_032752 Location (UCSC) Chr 1: 11.86 – 11.86 Mb Chr 4: 148.07 – 148.07 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Brain natriuretic peptide 32 (BNP), also known as B-type natriuretic peptide, is a ...
Tropomyosin is a two-stranded alpha-helical, coiled coil protein found in many animal and fungal cells. In animals, it is an important component of the muscular system which works in conjunction with troponin to regulate muscle contraction. It is present in smooth and striated muscle tissues, which can be found in various organs and body ...
A crossword(or crossword puzzle) is a word gameconsisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to separate ...
Neuroeffector junction. A neuroeffector junction is a site where a motor neuron releases a neurotransmitter to affect a target—non-neuronal—cell. This junction functions like a synapse. However, unlike most neurons, somatic efferent motor neurons innervate skeletal muscle, and are always excitatory. Visceral efferent neurons innervate ...
The sarcoplasmic reticulum (SR) is a membrane -bound structure found within muscle cells that is similar to the smooth endoplasmic reticulum in other cells. The main function of the SR is to store calcium ions (Ca 2+). Calcium ion levels are kept relatively constant, with the concentration of calcium ions within a cell being 10,000 times ...