NASM CPT 7TH EDITION
QUESTIONS AND CORRECT
ANSWERS
actin and myosin ANSW✅✅-actin: thin muscle fiber filaments
-myosin: thick with bump like projections
motor unit ANSW✅✅motor neuron and the muscle fibers it innervates
alpha motor units ANSW✅✅fibers that carry action potentials to contract
sliding filament theory ANSW✅✅-ATP required
-actin slide together
-myosin stay still
myofibrils ANSW✅✅made of sarcomeres and myofilaments
excitation contraction coupling ANSW✅✅-electrolyte calcium and neuortransmittr acetylcholine
involved
all or nothing principle for muscle contraction ANSW✅✅either fully contracts or not at all
muscles involved with fine motor skills have motor units with fewer... ANSW✅✅innervated fibers
muscle fibers types ANSW✅✅-Type I: slow twitch, smaller, minimal tension, less force, fatigue
resistant/more oxygen delivery, running, standing
-Type II: fast twitch, longer, maximal tension, more force, fatigue quickly/less oxygen delivery
-Type IIA: fast twitch oxidative, intermediate fatigue resistance, sprinting, weights
-Type IIB: fast twitch glycolyic, fatigue rapidly, high force, fastest sprints, maximal lifts
, blood pressure ANSW✅✅the heart generates high hydrostatic pressure to pump blood out of the
heart and low pressure to go back in
heart is located in the _____ ANSW✅✅mediastinum area between the lungs
heart wall structure ANSW✅✅-double walled sac called the pericardium
-outer layer: fibrous pericardium
-serous pericardium consists of inner visceral pericardium which is part of the heart wall and outer
parietal pericardium
heart wall layers ANSW✅✅myocardium contracts
heart general structure ANSW✅✅
atria ANSW✅✅thin walled, receive blood under low BP
ventricles ANSW✅✅receive blood from atria and push blood out; thick walls
circulation of blood through the heart ANSW✅✅-blood enters right atrium from body
-exits through tricuspid valve into right ventricle
-blood is pushed into pulmonary arteries towards the lungs through pulmonary valve
-blood goes through pulmonary veins into left atrium
-blood goes from the left atrium through mitral valve into left ventricle
-exits aortic valve to go to rest of body
systemic loop of blood flow ANSW✅✅left atrium to left ventricle to whole body
skeletal vs cardiac muscle ANSW✅✅-both are striated and uses sliding filament model but CM is
not voluntary
-skeletal have multinucleate cells, CM have 1 or 2
QUESTIONS AND CORRECT
ANSWERS
actin and myosin ANSW✅✅-actin: thin muscle fiber filaments
-myosin: thick with bump like projections
motor unit ANSW✅✅motor neuron and the muscle fibers it innervates
alpha motor units ANSW✅✅fibers that carry action potentials to contract
sliding filament theory ANSW✅✅-ATP required
-actin slide together
-myosin stay still
myofibrils ANSW✅✅made of sarcomeres and myofilaments
excitation contraction coupling ANSW✅✅-electrolyte calcium and neuortransmittr acetylcholine
involved
all or nothing principle for muscle contraction ANSW✅✅either fully contracts or not at all
muscles involved with fine motor skills have motor units with fewer... ANSW✅✅innervated fibers
muscle fibers types ANSW✅✅-Type I: slow twitch, smaller, minimal tension, less force, fatigue
resistant/more oxygen delivery, running, standing
-Type II: fast twitch, longer, maximal tension, more force, fatigue quickly/less oxygen delivery
-Type IIA: fast twitch oxidative, intermediate fatigue resistance, sprinting, weights
-Type IIB: fast twitch glycolyic, fatigue rapidly, high force, fastest sprints, maximal lifts
, blood pressure ANSW✅✅the heart generates high hydrostatic pressure to pump blood out of the
heart and low pressure to go back in
heart is located in the _____ ANSW✅✅mediastinum area between the lungs
heart wall structure ANSW✅✅-double walled sac called the pericardium
-outer layer: fibrous pericardium
-serous pericardium consists of inner visceral pericardium which is part of the heart wall and outer
parietal pericardium
heart wall layers ANSW✅✅myocardium contracts
heart general structure ANSW✅✅
atria ANSW✅✅thin walled, receive blood under low BP
ventricles ANSW✅✅receive blood from atria and push blood out; thick walls
circulation of blood through the heart ANSW✅✅-blood enters right atrium from body
-exits through tricuspid valve into right ventricle
-blood is pushed into pulmonary arteries towards the lungs through pulmonary valve
-blood goes through pulmonary veins into left atrium
-blood goes from the left atrium through mitral valve into left ventricle
-exits aortic valve to go to rest of body
systemic loop of blood flow ANSW✅✅left atrium to left ventricle to whole body
skeletal vs cardiac muscle ANSW✅✅-both are striated and uses sliding filament model but CM is
not voluntary
-skeletal have multinucleate cells, CM have 1 or 2
