WorksheetsMuscular System
Total questions: 22
Worksheet time: 11mins
Which of these is NOT a major task of the muscular system?
Movement for your body
Heat production for the body
Maintaining posture
Making red blood cells
Which of the following words means “the ability to recoil or bounce back to the original shape”?
excitability
contractibility
extensibility
elasticity
Which type of muscle is involuntary and makes up many of your internal organs?
skeletal
smooth
gastrointestinal
cardiac
Which type of muscle(s) is/are nonstriated?
skeletal muscle
cardiac muscle
smooth muscle
Which membrane covers an individual muscle fiber?
endomysium
epimysium
perimysium
What type of channel on the axon terminal is stimulated by an incoming action potential and allows Calcium to enter the axon?
chemically-gated
voltage-gated
myosin-gated
When Calcium ions enter the neuromuscular junction, what neurotransmitter is released across the synaptic cleft?
Calcium
Acetylcholine
K+
Na+
What attaches muscle to bone?
ligaments
tendons
sliding filaments
sarcomeres
Which two structures block the active site on an actin filament?
z-disc & the m-line
calcium & myosin
troponin & tropomyosin
actin & perimysium
The ______________ separate one sarcomere from another.
cross bridges
Z-discs
M-lines
active sites
When myosin heads make a cross bridge and bend pulling the actin myofilament toward the center of the sarcomere, it is called the ________________.
power stroke
neuromuscular junction
return stroke
ATP contraction
The deltoid is attached to the clavicle and the humerus. Which one of these points is the insertion?
clavicle
humerus
neither, the deltoid doesn’t have an insertion
When you do sit-ups, your rectus abdominus is the _________________ and the latissimus dorsi is the _________________.
insertion; origin
origin; insertion
antagonist; prime mover
prime mover; antagonist
How much ATP is used in each myosin/actin cross-bridge cycle?
1
2
3
4
When you become out of breath and your muscles begin to burn during a workout, this is caused by
lack of calcium
lack of water
lack of oxygen
lack of acetylcholine
During rigor mortis, __________ floods the muscle fibers but a lack of ____________ prevents them from detaching.
Calcium, ATP
ATP, Calcium
oxygen, ATP
Essential to making plenty of ATP in cellular respiration
Calcium
ATP
Sarcoplasmic reticulum
Oxygen
Epimysium
Myofilament that is essential to muscle contraction
Calcium
ATP
Sarcoplasmic reticulum
Actin
Epimysium
Outer membrane found around the belly of the muscle
Calcium
ATP
Sarcoplasmic reticulum
Actin
Epimysium
Covers each muscle fiber and conducts impulses
Calcium
ATP
Sarcoplasmic reticulum
Actin
Epimysium
Comes in from a nerve cell to remove molecules blocking active sites
Calcium
ATP
Sarcoplasmic reticulum
Actin
Epimysium
Prepares a myosin head for its power stroke
Calcium
ATP
Sarcoplasmic reticulum
Actin
Epimysium
