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Muscles MCQs
Functions of muscles include __
Digestion of food
Help you Standing upright
movement
All of these
All of these
__ is the squeezing of food down through the esophagus, stomach, and intestines
churning
Peristalsis
Digestion
defecation
Peristalsis
the parts of the muscle fiber that contract is called?
cartilage
Myofibrils
Collagen
None of these
Myofibrils
The repeating unit of striations in muscles containing light and dark bands is called a _
centromere
sarcomere
entomere
None of these
sarcomere
__ types of muscle tissue exist within your body
3
5
6
2
3
_ is found in the heart
Skeletal muscle
Smooth muscle
Cardiac muscle
None of these
Cardiac muscle
Which of these are uninucleated?
Smooth muscle
Cardiac muscle
Both of these
Skeletal muscle
Both of these
__ are cylindrical in shape and branched
Skeletal muscle
Smooth muscle
Cardiac muscle
None of these
Cardiac muscle
Cardiac muscle contraction is _
Voluntary
Partially voluntary
Involuntary
none of these
Involuntary
_ is found in the walls of internal organs that are hollow, such as the stomach, bladder, intestines, or lungs
Skeletal muscle
Smooth muscle
Cardiac muscle
None of these
Smooth muscle
The fibers of _ tissue are shaped like spindles and arranged in parallel lines
Skeletal muscle
Cardiac muscle
Smooth muscle
None of these
Smooth muscle
Smooth muscle contraction occurs _
voluntarily
involuntarily
Both of these
None of these
involuntarily
skeletal muscle contraction is _
Voluntary
Partially voluntary
Involuntary
none of these
Voluntary
filament types found in myofibrils are _
2
4
6
5
2
_ has molecules of troponin and tropomyosin at binding sites along its actin double helix
Myosin (thick) filaments
Actin (thin) filaments
Both of these
None of these
Actin (thin) filaments
_ is a type of protein with a bulbous end
actin
Collagen
keratin
Myosin
Myosin
The actin filaments are attached to something called a _ in muscles
B-line
R-line
Z-line
G-line
Z-line
Muscle cells are loaded with _, organelles that perform cellular respiration.
Ribosomes
Endoplasmic reticulum
Golgi apparatus
mitochondria
mitochondria
_ fermentation produces a small amount of ATP through the partial breakdown of glucose, is a worst-case scenario for muscle cells
alcohlic
Lactic acid
Both of these
None of these
Lactic acid
_ binds to the troponin in the actin filament, which causes the tropomyosin in the actin filament to move out of the way so the binding sites on the actin filament can open
copper
Calcium
sodium
magnesium
Calcium
Calcium binds to the _ in the actin filament, which causes the tropomyosin in the actin filament to move out of the way so the binding sites on the actin filament can open
Myosin
Collagen
cartilage
Troponin
Troponin
