BISC276 Study Guide - Midterm Guide: Reticular Connective Tissue, Ileum, Motor Unit

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC276
• Professor: William Reed

Document Summary

Electrical excitability; ability to respond to certain stimuli by producing electrical signals (muscle action potentials) *depolarization of membranes. Contractiality; ability to generate tension to do work. Elasticity; ability to return to original shape after contracting/extending. Connective tissue components, blood vessels & nerves/skeletal muscles. Fascia: sheet of fibrous ct, surrounds muscles and organs (muscles fascicles fibers: superficial; separates muscle from skin; adipose & areolar ct (*areolar allows skin to be movable over muscle, deep; lines body wall, holds muscles w/similar functions together. Perimysium: surrounds each fascicle (bundle of 10-100 muscle fibers) Endomysium: thin sheath of areolar ct, surrounds each muscle fiber. Tendon: cord of dense regular ct; attaches muscle to bone (periosteum) Somatic motor neurons: stimulate skeletal muscle to contract; voluntary. Axon collaterals: axons of somatic motor neurons; branch inside muscle, extend to different muscle fibers. Neuromuscular junction (nmj): connection b/w neuron and muscle fiber. Synaptic end bulbs: expanded clusters of axon terminals; at nmj.