Muscular System Complete Solutions
What are the three muscle types in the body? - ANSWER-skeletal, cardiac, smooth
What is the endomysium? - ANSWER-a thin layer of connective tissue that surrounds
each muscle fiber
What is the perimysium? - ANSWER-connective tissue that surrounds groups of 10-100
individual muscle fibers separating them into bundles called fascicles.
What is the epimysium? - ANSWER-Connective tissue layer(outside muscle); an
overcoat of dense irregular connective tissue that surrounds the whole muscle
Where are smooth muscles found in the body? - ANSWER-walls of hollow organs
(except heart) in the digestive system, blood vessels, and urinary system
How is cardiac muscle contraction regulated? - ANSWER-involuntary contraction
What are the functions of muscle? - ANSWER-producing movement, maintaining
posture, stabilizing joints and generating heat
What is the sarcolemma? - ANSWER-specialized plasma membrane of muscle cells
What is the function of the sarcoplasmic reticulum? - ANSWER-stores calcium
What is myosin? - ANSWER-Thick filament protein with a head and elongated tail, the
heads form cross bridges with the thin filaments during muscle contraction
What is actin? - ANSWER-Thin filament protein. Twisted into a double helix and
appears like a double-stranded chain of pearls. Contains the myosin-binding site.
What is the neurotransmitter for muscle contraction? - ANSWER-acetylcholine (ACh)
What is a cross bridge? - ANSWER-The connection of a myosin head group to an actin
filament during muscle contraction (the sliding filament theory)
What is the ability of a muscle to recoil after being stretched? - ANSWER-elasticity
A sarcomere is the distance between two __ ? - ANSWER-Z discs
The thicker filaments are the ________filaments. - ANSWER-myosin
What are the three muscle types in the body? - ANSWER-skeletal, cardiac, smooth
What is the endomysium? - ANSWER-a thin layer of connective tissue that surrounds
each muscle fiber
What is the perimysium? - ANSWER-connective tissue that surrounds groups of 10-100
individual muscle fibers separating them into bundles called fascicles.
What is the epimysium? - ANSWER-Connective tissue layer(outside muscle); an
overcoat of dense irregular connective tissue that surrounds the whole muscle
Where are smooth muscles found in the body? - ANSWER-walls of hollow organs
(except heart) in the digestive system, blood vessels, and urinary system
How is cardiac muscle contraction regulated? - ANSWER-involuntary contraction
What are the functions of muscle? - ANSWER-producing movement, maintaining
posture, stabilizing joints and generating heat
What is the sarcolemma? - ANSWER-specialized plasma membrane of muscle cells
What is the function of the sarcoplasmic reticulum? - ANSWER-stores calcium
What is myosin? - ANSWER-Thick filament protein with a head and elongated tail, the
heads form cross bridges with the thin filaments during muscle contraction
What is actin? - ANSWER-Thin filament protein. Twisted into a double helix and
appears like a double-stranded chain of pearls. Contains the myosin-binding site.
What is the neurotransmitter for muscle contraction? - ANSWER-acetylcholine (ACh)
What is a cross bridge? - ANSWER-The connection of a myosin head group to an actin
filament during muscle contraction (the sliding filament theory)
What is the ability of a muscle to recoil after being stretched? - ANSWER-elasticity
A sarcomere is the distance between two __ ? - ANSWER-Z discs
The thicker filaments are the ________filaments. - ANSWER-myosin
