A&P Ch 9 questions
what is the consequence of tetanus?
sustained muscle contraction
the hamstrings...
are located on the poster thigh
the gluteal and quadriceps femoris muscle...
assist in abduction of the thigh
what event causes the muscle to relax?
calcium is pumped back into the SR
which of the following is most related to the role of myoglobin?
carrier of oxygen
which condition is most likely to develop in a person whose leg is a non-bearing cast for several months?
disuse muscle atrophy of the affected leg
which condition is most associated with aging?
graduate loss of muscle strength
which of the following is least descriptive of the deltoid muscle?
has its origin on the humerus
rigor mortise develops...
in response to deficiency of ATP
which structure slide in the sliding filament mechanism of the muscle contraction?
increase muscle contraction
what is the consequence of recruitment?
increased force of muscle contraction
which of the following is indicated by the terms pectorals, gluteus, brachia, and lateralis?
location of a muscle
what happens when the rector sites on the muscle membrane are damaged so that the transmitter ACh cannot bing properly?
muscle contraction is impaired and the patient experiences muscle weakness
which of the following is indicated by the terms biceps, triceps, and quadriceps?
number of organs of the muscle
a motor unit...
refers to motor neuron and the muscle fibers that the neuron supplies
what is the role of the sarcoplasmic reticulum (SR) in muscle contraction?
releases calcium into the sarcomere
what is the basis for naming the sternocleidomastoid?
sites of the attachment of the muscle
Which muscle produce movement of the extremities, maintain body posture, and stabilize joints?
skeletal muscle
which muscle in the bronchioles (breathing passages) and the blood vessels?
smooth muscle
what was the purpose of the curare-like drug?
to cause muscle relaxation
supinators and the pronators ...
twist the bones of the forearm
which of the following terminates events in the neuromuscular junction?
ACh is inactivated
what may the curare-like drug affect? It
interfere with activity in the neuromuscular junction, thereby impairing contraction of the respiratory muscle
creatine phosphate...
is an energy source for the muscle contraction
why may the weight of bed linen on a bedridden patient cause disabling contracture?
the linen forces the foot into a position of plantar flexion
what happens when u repetitively and rapidly simulate a skeletal muscle?
the muscle tetanizes
what action is antagonistic to the biceps brachia muscle ?
the triceps brachia contracts
