WorksheetsMuscular System: Quiz Review
Total questions: 30
Worksheet time: 21mins
What is the smallest contractile unit of a muscle?
fascicle
muscle fiber
sarcomere
myofibrils
The ions that are responsible for binding to the troponin-tropomyosin complex and 'unlocking' the active sites on actin is _____.
Sodium
Calcium
Potassium
Magnesium
What is the name of the protein that makes up the thick filaments?
actin
myosin
myoglobin
titin
What is the name of the main protein that makes up the thin filaments in the muscle cell?
Actin
Myosin
Myoglobin
Titin
If muscle cells are stimulated repeatedly without adequate periods of rest, lactic acid accumulates, and the muscle will lose its ability to contract. This is known as:
Atrophy
Fatigue
Debt
Hypertrophy
cardiac
heart, involuntary, branching, striations
heart, voluntary, branching, striations
heat, smooth, involuntary
heart, striations, voluntary
involuntary, no striations
skeletal muscle
cardiac muscle
smooth muscle
hypertrophy of muscles
less movable end
point of insertion
the result of a twitch impulse
decrease of angle
point of origin
What is an overstretched muscle/tendon called?
contraction
fractured
broken
strain
This happens when a muscle remains contracted due to overuse, lack of water, or lack of oxygen
Strain
Sprain
Cramp
Pulled Muscle
The main purpose of the muscular system is to....
Keep the heart beating
Move the body
Move blood cells
Transfer oxygen
What kind of muscle is inside your stomach?
Cardiac
Skeletal
Smooth
None
When a muscle fiber contracts, it _______.
elongates
shortens
thins out
grows hair
What is the structure that stores the calcium ions in the muscle cell?
Sarcoplasm
Sarcolemma
Sarcoplasmic Reticulum (Cisternae)
Myoglobin
The neurotransmitter that initiates a muscle contraction by transferring the nerve impulse to the muscle fiber is called...
Acetylcholine
Myosin
Actin
Calcium
When a muscle fiber contracts, the I bands become smaller.
True
False
Summation refers to...
a motor neuron.
a muscle contracting during the latent period.
the increased force of contraction when a twitch occurs before the previous twitch fully relaxes.
adding together different muscle fibers during a contraction.
If you do not exercise your muscles, they will become weak, flaccid, and will begin to:
hypertrophy
atrophy
oxygen debt
glycolysis
Muscles that are partially contacted at all times are said to be in a constant state of readiness, called muscle:
Origin
Insertion
Tone
Hypertrophy
A person who lifts weights overuses muscles. This stimulation will cause the muscles to enlarge, or:
atrophy
lose tone
hypertrophy
lose mass
The process where acetylcholine is released into the synaptic cleft is known as...
phagocytosis
diffusion
exocytosis
osmosis
The ends of the sarcomere, which attach to the actin, and move during muscle contraction, are known as the...
H zones
M lines
ACh sites
Z discs
The M line is located...
in the middle of the myosin at the center of the sarcomere.
at the ends of the sarcomeres.
between the neuron and the muscle fiber.
between the actin and myosin before contraction.
Which part of cellular respiration is used to produce ATP without oxygen? (Muscles use this during anaerobic exercise.)
exocytosis
nerve impulse
glycolysis
photosynthesis
Which of these is an aerobic exercise?
Bench Press
Squats
Push Ups
Biking on a Road
How can you strengthen your muscles?
By doing nothing
Resistance or Aerobic Exercises
Playing Video Games
Eating Junk Food
true or false: the muscular system aids in digestion
true
false
