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WorksheetsThe Muscular System
Total questions: 24
Worksheet time: 12mins
Which cellular process is used to get and store energy from the food that we eat?
mitosis
meiosis
DNA repair
cellular respiration
Which involuntary muscle constitutes the main tissue of the walls of the heart?
cardiac muscle
smooth muscle
vital organ muscle
skeletal muscle
Which muscle is responsible for most of the involuntary processes of your inner organs?
cardiac muscle
smooth muscle
vital organ muscle
skeletal muscle
Which skeletal muscle's fleshy mass forms the prominence of the buttocks?
the gluteus maximus
the masseter
the abductor pollicis brevis
the gastrocnemius
How many skeletal muscles are in the adult human body?
250
460
520
640
Skeletal muscles, like all of your muscles, are only good at two things: ___
contracting and relaxing
pushing and pulling
flexing and shortening
sagging and lengthening
Skeletal muscles thicken in the middle, at what's called the ___
contraction region
muscle belly
engorged gut
flex zone
Skeletal muscles taper off on either end into a ___
insertion point
ligament
tendon
tether zone
Tendons, that connect the muscle to the bone, are made of fibrous proteins, mostly ___
trypsin
pepsin
elastin
collagen
A chicken breast is, or was, which muscle of a chicken?
the latissimus dorsi
the pectoralis major
the quadriceps femoris
the gluteus maximus
Stringy muscle fascicles are each made up of lots and lots of smaller strands called ___
muscle threads
cilia
muscle fibers
stringlets
Muscle cells are not like your run-of-the-mill somatic cells; For starters, they each have ___
multiple nuclei
thicker cell walls
fewer mitochondria
two set of chromosomes
What is the Greek word for muscle, which is used as a prefix in biological terms?
"mia"
"mao"
"myo"
"moy"
The Greek prefix "sarco-" means ___
"flesh"
"body"
"engorged"
"skin"
The protein strands that make up a muscle cell are called ___
sarcofibrils
myofibrils
myofilaments
sarcomeres
Each myofibril protein strand is divided lengthwise into segments called ___
sarcofibrils
heliofiles
myofilaments
sarcomeres
Sarcomere function occurs through an interaction between two different kinds of protein strands called ___
sarcostrands
myostrands
sarcofilaments
myofilaments
Which skinny strand of myofilament protein attaches to one of the ends of the sarcomere?
actin
myosin
pepsin
trypsin
Which thick strand of myofilament protein is studded with little golf club shaped heads?
actin
myosin
pepsin
trypsin
Two papers on the discovery of the "sliding filament model" of muscle contraction were published in what year?
1936
1945
1954
1963
In a sarcomere, which ions change the shape of some of the proteins?
sodium
potassium
calcium
magnesium
Two proteins wrapped around the actin, called tropomyosin and troponin, act as a kind of ___
hard shell
elastic band
conductive sheath
insulation
What is the name of the membrane-bound structure, wrapped around each sarcomere, that stores calcium ions?
smooth endoplasmic reticulum
sarcoplasmic reticulum
rough endoplasmic reticulum
myosympathetic reticulum
The energy from ATP is used to make the muscle relax; That's why, when you're dead, you get ___
taphonomic changes
livor mortis
algor mortis
rigor mortis
