38 terms

Anatomy Chapter 10 Study Guide 2

The type of muscle fiber that is most resistant to fatigue is the ______ fiber.
require maximal contraction of muscles for short periods of time
Contractions that utilize anaerobic ATP production
most of the muscle's energy is produced in mitochondria
During activities requiring aerobic endurance
repeated, exhaustive stimulation
Fast muscle fibers can develop a larger number of mitochondria in response to
both C and D
Which of the following statements are true regarding human muscles?
muscle fibers increase their reserves of glycogen
Each of the following changes in the skeletal muscles is a consequence of aging except that
Heat energy produced from muscle contraction is released through the ____ system.
Cardiac muscle control is neural
Which of the following statements is false?
Smooth muscle connective tissue forms tendons and aponeuroses
Which of the following is not characteristic of smooth muscle?
forcing blood from the heart into the major arteries
Which of the following is not a function of smooth muscle tissue?
The ability of smooth muscle to function over a wide range of lengths is called
Muscle tissue, one of the four primary types of tissue, consists chiefly of muscle cells that are highly specialized for
striated muscle
The types of muscle tissue include all of the following except
At each end of the muscle, the collagen fibers of the epimysium, perimysium, and endomysium come together to form either a bundle known as a _____, or a broad sheet called an aponeurosis.
all of the above
In order for a muscle to contract properly, it requires
the central nervous system
Skeletal muscle contracts only under stimulation from
both A and B
Differences between skeletal muscle cells and typical cells include which of the following?
hundreds to thousands
Each skeletal muscle fiber contains ____ myofibrils.
all of the above
When a skeletal muscle fiber contracts,
Knowning that the myofibrils attached at the Z line of the sarcolemma and at either end of the muscle fiber, when myofibrils get shorter, the muscle fiber
The pull called tension is a(n) ____ force.
The cytoplasm of the synaptic terminal contains mitochondria and vesicles filled with molecules of the neurotransmitter
the action potential does not arrive
Knowing the five steps that occur causing a neuron to stimulate a muscle fiber, if there is a problem with the release of calcium ions in the third step,
ATP metabolism normally provides _____ percent of the ATP demands of resting cell.
tension rises and the skeletal muscle length changes
In an isotonic contraction,
muscles are attached to bones by tendons
The contraction of a muscle exerts a pull on a bone because
fast fibers
Large diameter, densely packed myofibrils, large glycogen reserves, and few mitochondria are characteristics of
A, B, and C
When contraction occurs
Which of the following hormones directly stimulates growth of muscle tissue and increased muscle mass?
a rich vascular supply.
Because skeletal muscle contractions demand large quantities of ATP, skeletal muscles have
hemoglobin concentration in muscle fibers increases.
During muscle contraction, all of the following occur, except
decreased distance between Z lines during contraction.
Physical evidence that supports the sliding filament theory of muscle contraction includes
they pivot toward the M line
When myosin cross-bridges bind to the active sites on actin,
the concentration of calcium ion in the sarcoplasmic reticulum of a resting muscle
Which of the following is greater?
3, 5, 1, 2, 4, 6
The following is a list of the events that occur during a muscle contraction......
rigor mortis
After death, muscle fibers run out of ATP and calcium begins to leak from the sarcoplasmic reticulum into the sarcoplasm. This results in a condition known as
It would cause spastic paralysis
How would blocking the activity of acetylcholinesterase affect skeletal muscle?
more permeable to sodium ions
When acetylcholine binds to receptors at the motor end plate, the muscle membrane becomes