Hệ vận động ở người

Home Lớp 8 Khoa học tự nhiên 8 - sách Kết nối tri thức Bài 31: Hệ vận động ở ngườiBài tập nâng cao

{"common":{"save":0,"post_id":"9391","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"10018","post_id":"9391","mon_id":"1159539","chapter_id":"1160063","question":"Ho\u1ea1t \u0111\u1ed9ng co c\u01a1 có ý ngh\u0129a gì?<\/p>","options":["A. Giúp c\u01a1 th\u1ec3 di chuy\u1ec3n","B. Giúp c\u01a1 th\u1ec3 v\u1eadn \u0111\u1ed9ng","C. Con ng\u01b0\u1eddi lao \u0111\u1ed9ng \u0111\u01b0\u1ee3c","D. C\u1ea3 ba \u0111áp án trên"],"correct":"4","level":"3","hint":"","answer":"\u0110áp án: D. C\u1ea3 ba \u0111áp án trên<\/strong><\/p>Ho\u1ea1t \u0111\u1ed9ng co c\u01a1<\/strong> là c\u01a1 s\u1edf cho m\u1ecdi v\u1eadn \u0111\u1ed9ng c\u1ee7a c\u01a1 th\u1ec3<\/strong>, vì:<\/p><ul data-end=\"474\" data-start=\"126\"> <li data-end=\"221\" data-start=\"126\">A. Giúp c\u01a1 th\u1ec3 di chuy\u1ec3n<\/strong>: Co c\u01a1 t\u1ea1o ra l\u1ef1c \u0111\u1ec3 di chuy\u1ec3n các b\u1ed9 ph\u1eadn nh\u01b0 tay, chân, c\u1ed5,...<\/p><\/li> <li data-end=\"308\" data-start=\"222\">B. Giúp c\u01a1 th\u1ec3 v\u1eadn \u0111\u1ed9ng<\/strong>: Bao g\u1ed3m m\u1ecdi ho\u1ea1t \u0111\u1ed9ng nh\u01b0 \u0111i, ch\u1ea1y, nh\u1ea3y, nói, vi\u1ebft,...<\/p><\/li> <li data-end=\"474\" data-start=\"309\">C. Con ng\u01b0\u1eddi lao \u0111\u1ed9ng \u0111\u01b0\u1ee3c<\/strong>: Nh\u1edd co c\u01a1 mà tay có th\u1ec3 c\u1ea7m n\u1eafm, thao tác, th\u1ef1c hi\u1ec7n công vi\u1ec7c — \u0111i\u1ec1u này \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong lao \u0111\u1ed9ng s\u1ea3n xu\u1ea5t và sinh ho\u1ea1t.<\/p><\/li><\/ul>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-06-11 21:11:59","option_type":"txt","len":2},{"id":"10019","post_id":"9391","mon_id":"1159539","chapter_id":"1160063","question":"\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o c\u1ee7a t\u1ebf bào c\u01a1 phù h\u1ee3p v\u1edbi ch\u1ee9c n\u0103ng co c\u01a1 là:<\/p>","options":["A. T\u1ebf bào c\u01a1 g\u1ed3m nhi\u1ec1u \u0111\u01a1n v\u1ecb c\u1ea5u trúc n\u1ed1i li\u1ec1n nhau","B. M\u1ed7i \u0111\u01a1n v\u1ecb c\u1ea5u trúc có t\u01a1 c\u01a1 dày, t\u01a1 c\u01a1 m\u1ea3nh x\u1ebfp xen k\u1ebd nhau","C. M\u1ed7i \u0111\u01a1n v\u1ecb c\u1ea5u trúc \u0111\u1ec1u có thành ph\u1ea7n m\u1ec1m d\u1ebbo phù h\u1ee3p v\u1edbi ch\u1ee9c n\u0103ng co dãn c\u01a1","D. C\u1ea3 A, B \u0111\u1ec1u \u0111úng"],"correct":"4","level":"3","hint":"","answer":"\u0110áp án: D. C\u1ea3 A, B \u0111\u1ec1u \u0111úng<\/strong><\/p>T\u1ebf bào c\u01a1 (\u0111\u1eb7c bi\u1ec7t là t\u1ebf bào c\u01a1 vân<\/strong>) có c\u1ea5u t\u1ea1o r\u1ea5t chuyên bi\u1ec7t \u0111\u1ec3 phù h\u1ee3p v\u1edbi ch\u1ee9c n\u0103ng co c\u01a1<\/strong>, c\u1ee5 th\u1ec3:<\/p><ul data-end=\"629\" data-start=\"172\"> <li data-end=\"375\" data-start=\"172\">A. T\u1ebf bào c\u01a1 g\u1ed3m nhi\u1ec1u \u0111\u01a1n v\u1ecb c\u1ea5u trúc n\u1ed1i li\u1ec1n nhau<\/strong>:<\/p> <ul data-end=\"375\" data-start=\"236\"> <li data-end=\"319\" data-start=\"236\">Nh\u1eefng \u0111\u01a1n v\u1ecb này g\u1ecdi là sarcomere<\/strong> – là \u0111\u01a1n v\u1ecb co c\u01a1<\/strong> c\u01a1 b\u1ea3n c\u1ee7a t\u1ebf bào c\u01a1.<\/p><\/li> <li data-end=\"375\" data-start=\"322\">Các sarcomere \u0111\u01b0\u1ee3c x\u1ebfp n\u1ed1i ti\u1ebfp t\u1ea1o nên s\u1ee3i c\u01a1 dài.<\/p><\/li> <\/ul> <\/li> <li data-end=\"629\" data-start=\"377\">B. M\u1ed7i \u0111\u01a1n v\u1ecb c\u1ea5u trúc có t\u01a1 c\u01a1 dày, t\u01a1 c\u01a1 m\u1ea3nh x\u1ebfp xen k\u1ebd nhau<\/strong>:<\/p> <ul data-end=\"629\" data-start=\"452\"> <li data-end=\"511\" data-start=\"452\">T\u01a1 c\u01a1 dày<\/strong> là myosin<\/strong>, t\u01a1 c\u01a1 m\u1ea3nh<\/strong> là actin<\/strong>.<\/p><\/li> <li data-end=\"629\" data-start=\"514\">Khi c\u01a1 co, t\u01a1 m\u1ea3nh (actin)<\/strong> tr\u01b0\u1ee3t vào vùng t\u01a1 dày (myosin), làm sarcomere ng\u1eafn l\u1ea1i<\/strong>, d\u1eabn \u0111\u1ebfn c\u01a1 co l\u1ea1i<\/strong>.<\/p><\/li> <\/ul> <\/li><\/ul>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-06-11 21:12:45","option_type":"txt","len":3},{"id":"10020","post_id":"9391","mon_id":"1159539","chapter_id":"1160063","question":"Ch\u1ee9c n\u0103ng c\u1ee7a c\u1ed9t s\u1ed1ng là:<\/p>","options":["A. B\u1ea3o v\u1ec7 tim, ph\u1ed5i và các c\u01a1 quan phía bên trong khoang b\u1ee5ng","B. Giúp c\u01a1 th\u1ec3 \u0111\u1ee9ng th\u1eb3ng, g\u1eafn x\u01b0\u01a1ng s\u01b0\u1eddn v\u1edbi x\u01b0\u01a1ng \u1ee9c thành l\u1ed3ng ng\u1ef1c","C. Giúp c\u01a1 th\u1ec3 \u0111\u1ee9ng th\u1eb3ng và lao \u0111\u1ed9ng","D. B\u1ea3o \u0111\u1ea3m cho c\u01a1 th\u1ec3 \u0111\u01b0\u1ee3c v\u1eadn \u0111\u1ed9ng d\u1ec5 dàng"],"correct":"3","level":"3","hint":"","answer":"\u0110áp án: C. Giúp c\u01a1 th\u1ec3 \u0111\u1ee9ng th\u1eb3ng và lao \u0111\u1ed9ng<\/strong><\/p><ul> <li data-end=\"212\" data-start=\"76\">C\u1ed9t s\u1ed1ng<\/strong> là tr\u1ee5 c\u1ed9t chính nâng \u0111\u1ee1 c\u01a1 th\u1ec3, giúp con ng\u01b0\u1eddi \u0111\u1ee9ng th\u1eb3ng, gi\u1eef th\u0103ng b\u1eb1ng và th\u1ef1c hi\u1ec7n các ho\u1ea1t \u0111\u1ed9ng v\u1eadn \u0111\u1ed9ng, lao \u0111\u1ed9ng.<\/p><\/li> <li data-end=\"371\" data-start=\"213\">Ngoài ra, c\u1ed9t s\u1ed1ng còn b\u1ea3o v\u1ec7 t\u1ee7y s\u1ed1ng<\/strong>, nh\u01b0ng không b\u1ea3o v\u1ec7 tim, ph\u1ed5i hay các c\u01a1 quan trong b\u1ee5ng<\/strong> – ch\u1ee9c n\u0103ng \u0111ó thu\u1ed9c v\u1ec1 l\u1ed3ng ng\u1ef1c<\/strong> và \u1ed5 b\u1ee5ng<\/strong>.<\/p><\/li><\/ul>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-06-11 21:13:32","option_type":"txt","len":3}]}