Chapter 8: Muscles and Muscle Tissue

bone

• 1. longest fibers
• 2. striations
• 3. many nuclei
• 4. voluntary
• 5. organ

fine sheath of areolar connective tissue that surrounds each muscle fiber

bundles of muscle fibers/cells

collagenic sheath that surrounds each fascicle

dense fibrous connective tissue that surrounds the entire muscle

found outside the epimysium

support, protection, and entry and exit routes for blood vessels and nerves.

plasma membrane surface

similar to cytoplasm; contains glycogen and myoglobin

hundreds of thousands of found in each muscle fiber (contain sarcomeres)

small area on the myofibril that is the base unit of contraction

myosin

• -actin
• -tropomyosin
• -troponin

a nueron that transmits impulses from the central nervous system to muscles and glands

area where the motor neuron meets the muscle fiber

membranous network of channels and tubules in a muscle fiber that stores calcium ions

membranous channel that extends from the sarcolemma deep inside the muscle fiber to deliver the impulse

aerobic respiration

pigment that stores oxygen

the amount of oxygen required to convert accumulated lactic acid to glucose and restore supplies of ATP and creatine phosphate

when a muscle loses its ability to contract