WorksheetsMuscular System
Total questions: 40
Worksheet time: 22mins
What is a threshold?
Is reached without a stimulus causing a muscle to contract
is reached when the oxygen debt returns causing a muscle to contract
is reached when force=motor units causing a muscle to contract
is reached when a strong stimulus causes a muscle to contract
If you are traveling on the Magic School Bus into a muscle during a contraction where would you NOT be?
into the cytoplasm during aerobic respiration.
into the axon terminals in the muscle fibers.
into the muscle cells causing the sodium and potassium to move in and out.
down the axon toward the muscle fiber.
Actin myofilaments look like ___ and myosin looks like ___.
golf clubs, string of pearls
big proteins, little proteins
string of pearls, golf clubs
I really shouldn't pick this answer.
Blinking an eye
uses large motor units
uses small motor units
is caused by tetanus
is repolarization
An axon terminal is located
outside the myofibril
center of the muscle fiber
center of the nucleus
in the epimysium
Skeletal muscle is ___ of the body weight.
10%
20%
30%
40%
Protein fibers are also called
contractions
sheaths
myofibrils
actin
Pick all that apply
Repolarization
is a cell in resting
has more Na inside
is more negative inside
causes K to move inside
What type of cartilage covers the ends of bones?
hyaline
fibrocartilage
blood
epimysium
What happens after you sprint a lap around the track?
metabolism remains low to help the cells
metabolism remains high to repay the oxygen debt
metabolism remains low because cells changed to anaerobic respiration
nothing because you are in the best shape of your life and everyone eats your dust!!!
What is going on with Bob's abs while he is sitting at his desk?
His muscles are being consciously squeezed while he winks at the girls.
The lactic build up is causing them to burn.
They are partially contracted to keep him from falling to the floor.
Due to the alcohol in his diet, they are bulging.
Mr. Hottie has been working out every day and is getting ready for swimsuit season. Which of the following is TRUE?
He has a huge amount of cytoplasm.
His epimysium is thicker.
He has numerous mitochondria.
His lactic acid level is up giving him more strength.
Check ALL that apply...
Which of the following is TRUE about Duchenne's muscular dystrophy?
Usually occurs in males because of the X chromosome.
There is currently no cure.
May walk on tiptoes when younger.
1 in 3000 are born with it.
Touching your thumb to your index finger
flexion
adduction
opposition
inversion
Lifting your toe toward your tibia
dorsiflexion
supination
circumduction
opposition
Placing your hand flat on the desk
flexion
rotation
supination
abduction
Moving your arms away from your body
abduction
adduction
flexion
opposition
Placing your arms by your sides
abduction
adduction
flexion
opposition
What causes muscle soreness?
cytoplasm
ATP
glucose
lactic acid
Which of the following are involuntary?
cardiac muscle
skeletal muscle
smooth muscle
Both cardiac and smooth
Stripes on muscles
Striations
Axon terminals
Muscle fiber
Cleavage
Energy produced by anaerobic and aerobic respiration
Glucose
Lactic acid
ATP
Mitochondria
The point between the origin and insertion
Axon terminals
Axon
Motor unit
Belly
Covering surrounding the entire muscle
perimysium
endomysium
epimysium
fascicle
The nerve and all of its fibers
muscle fiber
motor unit
epimysium
axon
Tissue that surrounds the fascicle
epimysium
perimysium
endomysium
muscle fiber
This muscle has striations and is involuntary
skeletal
cardiac
smooth
both cardiac and smooth
What is A
epimysium
perimysium
muscle fiber
myofibril
What is B?
epimysium
perimysium
myofibril
muscle fiber
What is C?
epimysium
perimysium
endomysium
fascicle
What is D?
epimysium
muscle fiber
perimysium
myofibril
What is E?
motor unit
axon terminals
axon
epimysium
What is F?
motor unit
axon terminals
axon
epimysium
Check ALL that apply...function of muscles
movement
maintains posture
stabilizes joints
generates heat
Ability to shorten with force
excitability
contractibility
extensibility
elasticity
A muscles ability to be able to recoil
excitability
extensibility
elasticity
contractibility
How does eating bananas help with leg cramps?
The K from the banana replaces the excess K in the muscles relieving the cramp.
The K from the banana replaces the excess Na in the muscles relieving the cramp.
The Na from the banana replaces the excess Na in the muscles relieving the cramp.
The Na from the banana replaces the excess K in the muscles relieving the cramp.
The most stationary end of a muscle
origin
insertion
belly
bone
Which of the following is NOT true about an unconscious person?
Hard to move
Loses muscle tone
no muscle control
legs are still partially contracted
Muscular dystrophy is named according to
if it is in a male or female
what age that you get it
which parent it originated from
muscle location
