Көлденең- жолақты бұлшықеттердің ультрақұрылымы. Биология, 10 сынып, дидактикалық материал.

Тапсырма 1.

Микросуреттер

Plate 7-2, Figure A. Longitudinal section through human Skeletal Muscle. N, Nucleus of muscle Fiber; Z, Z-band; dotted line, outline of single Myofibril; brackets, limits of one Sarcomere. 11,000 X

Figure B. Electron micrograph of sarcomeres within longitudinal section of relaxed human Skeletal Muscle. A, A-band; H, H-zone; I, I-band; M, mitochondrion; SR, Sarcoplasmic Reticulum; Z, Z-band. 35,500 X

Figure C. Cross section of Myofibril of human Skeletal Muscle through A-band of Sarcomere. A, A-band; SR, sarcoplasruic reticulum; dotted line, outline of single Myofibril; arrow, "thick" (Myosin) filament; arrowhead, "thin" (actifl) filament. 84,000 X

Figure D. Longitudinal section through partially contracted Sarcomere. A, A-band; 1, shortened I-band; M, mitochondrion; SR, terminal cisterna of Sarcoplasmic Reticulum; T, tubule of T-System; Z, Z-band; dotted line encircles triad. 52,000 X 78

Plate 7-3, Figure A. Electron micrograph of cross section through the Atrium of the squirrel monkey heart. CT, connective tissue; EN, Endocardium; EPI, Epicardium; L, lumen of Atrium; MYO, Myocardium; dotted line, outline of individual Cardiac Muscle Cell. 2,800 X

Figure B. Longitudinal section through portions of several cardiac muscle fibers. A, A-band; Co, Collagen fibrils; 1, I-band; ID, Intercalated Disk; M, Mitochondria; MF, Myofibril; Z, Z-line; dotted line, outline of individual Cardiac Muscle Cell. 16,000 X 80