lecture 2 [tissue level organization_muscle and nervous] Flashcards
characteristics of muscle tissue
- cells (muscle fibers)
- contractile (when cells are active, internal changes cause them to shorten)
- movement
receives stimulation from nervous system and/or endocrine system
skeletal muscle fiber structure
striated, multinucleated, cylindrical shape
skeletal muscle fiber function
voluntary movement, moves skeleton, locomotion, and heat production
skeletal muscle fiber location
attaches to bone or skin, voluntary sphincters (lips, urethra, anus)
cardiac muscle fiber structure
striated, intercalated discs, one or two nuclei per cell
cardiac muscle fiber function
involuntary movement, pumps blood in the heart
cardiac muscle fiber location
heart wall (myocardium)
smooth muscle fiber structure
non-striated, spindle shaped cells, mononucleated
smooth muscle fiber function
involuntary movements and motion, moves materials through internal organs
smooth muscle fiber location
walls of hollow organs (vessels, airways, stomach, bladder, uterus, involuntary sphincters)
neuron characteristics
- excitable (specialized ot conduct electrical signals through the body)
- extreme longevity
- non mitotic
- consists of cell body, axons, and dendrite
glial cell characteristics
- non-excitable
- mitotic
- 6 types
neuron function
- controls activities
- process information
glial cell function
support and protect neurons
nervous tissue structure
neuron, cell body, nuclei of neuroglial cells
