Exam 3, Set 4
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (17 张)
voltage-sensitive receptors in excitation-contraction coupling
Initiates intracellular calcium release for muscle contraction.
terminal cisternae in excitation-contraction coupling
Helps form the triad
Ca2+ channels in excitation-contraction coupling
Activation of Ca2+ release channels in the TC-SR
troponin in excitation-contraction coupling
binds to Ca2+
tropomyosin in excitation-contraction coupling
Prevents cross-bridge formation during muscle relaxation by covering myosin binding sites.
actin filaments in excitation-contraction coupling
drawn toward the center of the sarcomere, overlapping the myosin filament
myosin filaments in excitation-contraction coupling
Myosin heads attach to actin
Ca2+ ATPase in excitation-contraction coupling
Returns calcium to the SR
the result of applying successive action potentials to a muscle.
Gradual increase in the force generated by that muscle
summation
Increased muscle force from repeated activation without adequate relaxation.
unfused tetanus
Muscle fibers can’t relax b/n rapid stimuli due to rapid stimulation.
complete tetanus
Continuous muscle contractions without relaxation
fatigue
Reduced force or power output after muscle activity.
recruitment
Using different motor units to produce a targeted muscle contraction in terms of intensity and type.
factors that influence the force, velocity, and duration of skeletal muscle contraction
muscle fiber type, load and recruitment.
characteristics of slow oxidative, fast oxidative, and fast glycolytic muscle fibers
Type 1 fibers- contract slowly, sustain low-power contractions, resist fatigue. Type 2A fibers- contract faster, utilizing both aerobic and anaerobic respiration, more susceptible to fatigue Type 2B fibers-contract quickly using anaerobic glycolysis, leading to rapid fatigue compared to Type 1 and Type 2A fibers
the formed elements that exist in blood and the purpose of each
Red blood cells (erythrocytes) carry oxygen throughout the body white blood cells (leukocytes) fight infections and diseases platelets (thrombocytes) prevent and stop bleeding.