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ch 8 sec 3 vocab

anatomy

TermDefinition
acetylcholine the neurotransmitter in muscle contraction
acetylcholinesterase enzyme that breaks down acetylcholine
ADP a biological molecule consisting of 1 adenine, 1 sugar, and 2 phosphates
ATP organic molecule that transfers energy
APTase enzyme that releases energy stored in the terminal phosphate bonds of ATP molecules
creatine phosphate muscle biochemical that stores energy
cross bridge myosin extending toward actin during contractions
fast fibers provide bigger and more powerful forces, but for shorter durations and fatigue quickly
glycolysis the energy releasing breakdown of glucose to produce 2 pyruvic acid molecules and a net of 2 ATP
hemoglobin the pigment responsible for the red color of blood
lactic acid organic compound formed from pyruivc acid in the anaerobic pathway of cellular respiration
muscular hypertrophy increase in the volume of a muscle due to the enlargement of its components
myoglobin is synthensized in muscle cells and imparts the reddish-brown color of skeletal muscle tissue
oxygen debt as lactic acid accumulates a person develops this
rigor mortis stiffening of muscles following death
sliding filament theory a muscle fiber contracts when mysoin filaments pull actin filaments closer together and shorten sarcomeres within a fiber
slow fibers fatigue resistant and focused on sustained, smaller movements, and postural control
tropomyosin a protein of muscle that forms a complex with troponin regulating the interaction of actin and myosin in muscular contraction
troponin cardic regulatory proteins that are found in the cytoplasm of cardiac myocytes
Created by: brooklynnrose1
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