骨骼肌的肌纤维由于着色的深浅不同,呈现出明暗相间的横纹,因此也将骨骼肌叫做横纹肌。其中明带(色浅明亮的横纹)就叫 I 带,I 带中央有一条深色的细线称为 Z 线;暗带(颜色较深的横纹)称为 A 带,A 带的中部有一比较明亮的窄带称为 H 带,H 带的中央有一条深色的细线叫 M 线。
在偏光顯微鏡下,明帶(light band)呈單折光,為各向同性(isotropic),又稱I帶;暗帶(dark band)呈雙摺光,為各向異性(anisotropic),又稱A帶。在電鏡下,暗帶中央有一條淺色窄帶稱H帶,H帶中央還有一條深M線。明帶中央則有一條深色的細線稱Z線。兩條相鄰Z線之間的一段肌原纖維稱為肌節(sarcomere)。每個肌節都由1...
The myofilaments are arranged into distinct sarcomeres defined by adjacent Z-lines that enclose I-bands on either side of a central A-band (Fig. The tubule system in these cephalocarid muscles consists of the transverse tubules (t-tubules), which invaginate from the sarcolemma at the level...
This is a picture under transmission electron microscope. The structure marked by 6 is A.I band B.A band C.Sarcomere D.Muscle fiber 点击查看答案 点击查看答案 点击查看答案 点击查看答案 点击查看答案 点击查看答案 点击查看答案 点击查看答案
The A and I band lengths in stretched or contracted horseshoe crab skeletal muscle - DEVILLAFRANCA () Citation Context ...dless of sarcomere length. It has been shown recently, however, that the A band in glycerinated myofibrils decreases with decreasing sarcomere length in several phyla of ...
Which of the following contains myosin but not actin? A) H zone. B) Myofibrils. C) A band. D) I band. E) Sarcomere. Which of the following functions as the motor protein in muscle tissue? a. Myosin. b. Tropomyosin. c. Actin. d. Troponin. e. Titin. ...
刷刷题APP(shuashuati.com)是专业的大学生刷题搜题拍题答疑工具,刷刷题提供A sarcomere consists ofA.1/2 I band + A band + 1/2 I bandB.1/2 A band + I band + 1/2 A bandC.1/2 I band + 1/2 A bandD.1/2 I band + A bandE.I band + A band的答案解析,刷刷题为用户提供
结果1 题目What constitute the sarcomere in skeletal muscle fiber? A. 1/2 I band + A band B. 1/2 Aband + I band C. A band + I band D. 1/2 I band + A band + 1/2 I band 相关知识点: 试题来源: 解析 D 反馈 收藏
A sarcomere is the area of a myofibril between two z-disks. It is the basic unit of muscle fibers. The striated appearance is due to the dark and light bands within it. Answer and Explanation: The light band of a skeletal...
1. Proteins are made of: a. DNA b. Enzymes c. nucleotides d. amino acids 2. The heads of each thick filament pull in the opposite directions. TRUE or FALSE? 3. Each linear assembly of the sarcomere is called: a. A band b. fibril...