动物生理学-肌肉的收缩.ppt

肌肉的收缩
掌握
1.(骨骼肌的)肌丝滑行理论和肌丝滑行
机制—横桥周期(循环)   

肌肉组织的生理功能
移动身体
保持姿势
呼吸
机体产热
通信
缩窄器官和血管
心脏跳动
肌肉组织的特性
收缩性Contractility
Ability of a muscle to shorten with force
兴奋性Excitability
Capacity of muscle to respond to a stimulus
伸展性Extensibility
Muscle can be stretched to its normal resting length and beyond to a limited degree
弹性Elasticity
Ability of muscle to recoil to original resting length after stretched
肌肉组织的分类
骨骼肌Skeletal
Attached to bones
Nuclei multiple and peripherally located
Striated, Voluntary and involuntary (reflexes)
平滑肌Smooth
Walls of ans, blood vessels, eye, glands, skin
Single nucleus centrally located
Not striated, involuntary, gap junctions in visceral smooth
心肌Cardiac
Heart
Single nucleus centrally located
Striations, involuntary, intercalated disks
骨骼肌的结构 I:
骨骼肌的结构 II:
骨骼肌的结构 III:
肌纤维:
肌膜
肌质
肌元纤维
内部结构:
肌原纤维
细肌丝
粗肌丝
肌质网
T管
终池
肌质
肌膜
三联体
横纹:
肌联蛋白
细肌丝
粗肌丝