WorksheetsHDT Muscle
Total questions: 19
Worksheet time: 12mins
The impulse that triggers a contraction travels deep into a muscle fiber by means of
Sarcoplasmic reticulum
Transverse Tubules
Mitochondria
Motor end Plates
Myofibrils are composed primarily of
Actin and Myosin
ATP and ADP
Troponin
Tropomyosin
The enzyme cholinesterase cause acetylcholine to
bind to actin
secret from the motor end plate
decompose
form cross bridges
A muscle cramp is likely due to a lack of
Actin
Myosin
ATP
ADP
Smooth Muscle
are composed of sheets of muscle cells
are under conscious control
is present in the walls of the stomach and intestines
none of these
Compared to skeletal muscle, smooth muscle
contracts more slowly and relaxes more slowly
contracts more slowly and relaxes more rapidly
contracts more rapidly and relaxes more slowly
contracts more rapidly and relaxes more rapidly
The all-or-none response means
all of the muscles in a region contract together
all of the muscle fibers within a muscle contract together
when a muscle fiber contracts, it contracts completely
when a muscle fiber contracts, all of its ATP is changed to ADP
Muscle fatigue is most likely due to an accumulation of
citric acid
lactic acid
creatine
myosin
