HUMB1000 Lecture Notes - Lecture 2: Intercalated Disc, Nervous Tissue, Skeletal Muscle
3 Aug 2018
School
Department
Course
Professor
Document Summary
Muscle tissue: highly cellular (a lot of cells filled with mitochondria), well vascularized (large blood supply) and responsible for most of bodies movement via contraction. Skeletal muscle: muscles attached to the bones of the skeleton, muscle cells are called muscle fibers (long and cylindrical and multinucleated) Striated appearance (linear marks: mostly under voluntary control but in involuntary movements can occur with skeletal muscle (twitching) Striated muscle with intercalated disks (allow coordinated movement) Cardiac: only found in the walls of the heart (responsible for pumping blood, under voluntary control. Smooth: found mainly in the walls of hollow organs (stomach bladder, uterus, blood vessels, no striations and single nucleus per muscle cell, under involuntary control. Nervous system: consists of the brain, spinal cord and nerves, nervous tissue is the main component of the ns, consisting of: Neurons (nerve cells)which have a cell body/soma, dendrites (input info) and axon (transmit nerve impulses away from cell body)
