BIO 121-Exam 3- Muscles UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Sarcolemma - CORRECT ANSWER - muscle cell membrane
Sarcoplasm - CORRECT ANSWER - cytoplasm of a muscle cell
muscle fiber - CORRECT ANSWER - a single muscle cell
sarcoplasmic reticulum (SR) - CORRECT ANSWER - specialized smooth endoplasmic
reticulum, which stores, releases, and retrieves Ca++
Troponin - CORRECT ANSWER - regulatory protein that binds tropomyosin to actin
Tropomyosin - CORRECT ANSWER - regulatory protein that covers myosin binding sites
on the actin molecules
Endomysium - CORRECT ANSWER - Connective tissue surrounding a muscle fiber
Perimysium - CORRECT ANSWER - Connective tissue surrounding a fascicle
Epimysium - CORRECT ANSWER - covers the entire skeletal muscle
Fasicle - CORRECT ANSWER - bundle of muscle fibers
mesoderm - CORRECT ANSWER - middle germ layer; develops into muscles, and much
of the circulatory, reproductive, and excretory systems
, Actin - CORRECT ANSWER - contractile protein, thin filaments
Myosin - CORRECT ANSWER - The contractile protein that makes up the thick filaments
of muscle fibers
membrane potential - CORRECT ANSWER - electrical gradient across a membrane
polarized membrane - CORRECT ANSWER - a membrane that exhibits a membrane
potential
smooth muscle - CORRECT ANSWER - Involuntary muscle found inside many internal
organs of the body
creatine kinase - CORRECT ANSWER - shuttles phosphate from a phosphate-storage
molecule creatine phosphate (CP) and gives it to ADP
Elevated troponin levels - CORRECT ANSWER - Damage to heart muscle (such as
during a heart attack) is indicated by?
heart attack - CORRECT ANSWER - a condition in which blood flow to part of the heart
muscle is blocked, causing heart cells to die
Heart attack risk factors - CORRECT ANSWER - Age, cholesterol, blood pressure,
smoking, diabetes, enlarged heart, weight
Extensibility - CORRECT ANSWER - The ability of a muscle to stretch beyond normal
resting length is called
ACTUAL Exam Questions and CORRECT
Answers
Sarcolemma - CORRECT ANSWER - muscle cell membrane
Sarcoplasm - CORRECT ANSWER - cytoplasm of a muscle cell
muscle fiber - CORRECT ANSWER - a single muscle cell
sarcoplasmic reticulum (SR) - CORRECT ANSWER - specialized smooth endoplasmic
reticulum, which stores, releases, and retrieves Ca++
Troponin - CORRECT ANSWER - regulatory protein that binds tropomyosin to actin
Tropomyosin - CORRECT ANSWER - regulatory protein that covers myosin binding sites
on the actin molecules
Endomysium - CORRECT ANSWER - Connective tissue surrounding a muscle fiber
Perimysium - CORRECT ANSWER - Connective tissue surrounding a fascicle
Epimysium - CORRECT ANSWER - covers the entire skeletal muscle
Fasicle - CORRECT ANSWER - bundle of muscle fibers
mesoderm - CORRECT ANSWER - middle germ layer; develops into muscles, and much
of the circulatory, reproductive, and excretory systems
, Actin - CORRECT ANSWER - contractile protein, thin filaments
Myosin - CORRECT ANSWER - The contractile protein that makes up the thick filaments
of muscle fibers
membrane potential - CORRECT ANSWER - electrical gradient across a membrane
polarized membrane - CORRECT ANSWER - a membrane that exhibits a membrane
potential
smooth muscle - CORRECT ANSWER - Involuntary muscle found inside many internal
organs of the body
creatine kinase - CORRECT ANSWER - shuttles phosphate from a phosphate-storage
molecule creatine phosphate (CP) and gives it to ADP
Elevated troponin levels - CORRECT ANSWER - Damage to heart muscle (such as
during a heart attack) is indicated by?
heart attack - CORRECT ANSWER - a condition in which blood flow to part of the heart
muscle is blocked, causing heart cells to die
Heart attack risk factors - CORRECT ANSWER - Age, cholesterol, blood pressure,
smoking, diabetes, enlarged heart, weight
Extensibility - CORRECT ANSWER - The ability of a muscle to stretch beyond normal
resting length is called
