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WorksheetsChapter 8 Anatomy Review
Total questions: 21
Worksheet time: 11mins
Myofibrils are composed primarily of
actin and myosin
perimysium and endomysium
ATP and ADP
Fasica and tendons
A motor unit typically includes
muscle fibers only
motor neurons only
Several motor neurons and one muscle fiber
One motor neurons and several muscle fibers
The amount of oxygen needed to support the conversion of lactic acid to glucose by the over is called the
oxygen debt
lactate debt
anaerobic value
aerobic conversion
Activities such as sprinting or weightlifting are most likely to stimulate development of
slow fatigable muscle fibers
fast fatigable muscle fibers
slow fatigue-resistant muscle fibers
fast fatigue-resistant muscle fibers
Compared to smooth muscle, skeletal muscle
contracts more slowly and relaxes more slowly
Contracts more rapidly and relaxes more rapidly
is under involuntary control
Contracts more slowly and relaxes more rapidly
Cardiac muscle is located in the heart.
True
False
Functions of muscle do not include
the heartbeat
production of heat
moving body parts
storing inorganic salts
The immovable end of a muscle is attached at its
origin
insertion
motor end plate
fascia
Exercise that includes strength training offers all of the following benefits except
increase the body's energy efficiency
lowers blood pressure
decreases the risks of developing arthritis and osteoporosis
increases bone density and bone length
The sheet of dense connective tissue that separates individual muscles and helps hold them in position is called
fascicles
fascia
epimysium
endomysium
Which of the following truly applies to cardiac muscle?
contain many nuclei
contract and relax slowly
lack transverse tubules
junction at intercalated discs
A sarcomere is best describe as _____
a part of the sarcoplasmic reticulum
a group of myofibrils
a unit within a myofibril
all of the choices are correct
Endomysium separates individual muscle fibers from each other
True
False
Binding sites on the surface of actin allow the formation of cross bridges with molecules of
ATP
myosin
tropomyosin
troponin
In a recording of a muscle twitch, the delay between the time a stimulus is applied and the time the muscle responds is called the
relaxation period
latent period
recovery period
contraction period
The minimal strength of stimulation needed to elicit a muscle contraction is called the
summation
complete tetanic
threshold stimulus
recruitment
The term "muscle" can not refer to
a cell
a tissue
an organ
an atom
Why is sprinting considered an anaerobic exercise?
it changes the metabolic capacity
it requires muscle metabolism
it uses anaerobic respiration as oxygen supply is insufficient for cellular requirements
it uses aerobic respiration as blood flow provides sufficient oxygen for cellular requirements
Which statement is true for skeletal muscles?
stimulation travels rapidly from cell to cell, causing contraction
controlled voluntarily
slower to contract and relax than other muscle types
functions ro pump blood
Which statement is true for smooth muscles?
only response to stimulation is contraction
Can be stretched and still maintain tension
Stimulation travels rapidly from cell to cell, causing contraction
functions to move bones
Which statement is true for cardiac muscles?
Functions to pump blood
respond to hormones
voluntarily controlled
can be stretched and still maintain tension
