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______ muscle cells are multinucleated

skeletal

mucle is often attached to bone by strong, cordlike structures called _____

tendons

the gap between the motor neuron and the muscle fiber it supplies is called the ______

synaptic cleft

the only energy source that can be used to directly power muscle activity is ______

ATP

Cardiac muscle fibers are conected by _______

inebreated disks

the _____ is a powerful forearm extendor

tricept

the plasma membrane of the skeletal muscle cell is called the ________

sarcolema

________ refers to a muschol cell's ability to receive and respond to a stimulus

irratibility

______ is a metabolic pathway that produces water, carbon dioxide, and ATP, and provides for a large amount of ATP per glucose because oxygen is used

aerobic respiration

a muscle type that opposes and reverses the action of another muscle is called a ______

antagonist

muscle tissue that is involuntary

cardiac muscle and smooth muscle

the muscle tissue that consists of single, very long, cylindrical, mulitinucleate cells with very obvious striations is

skeletal muscle only

which of the following groupings is INCORRECT

striated muscle, cylindrical cells, attached to the skeleton, involuntary

which of the following connective tissues surrounds an individual muscle cell:

endomysium

which of the following is OT a function fo the muscular system

hematopoiesis

sarcomere is

the contractile unit of muscle cells

which of the following are composed of myosin

thick filaments

a motor unit consists of

a neuron and all of the skeletal muscle fibers that it stimulates

the mechanical force of cantraction is generated by

a sliding of thin filaments past thick ones

a cetylcholine is

a nerotrasmitter

the muscle that acts as the prime mover for elbow felxion is

biceps

an elaborate network of membranes in skeletal muscle cells that function in calcium storage is the

sarcoplasmic reticulum

during muscle contraction, myosin cross bridges attach to active sites of

actin filaments

the major function of the sarcoplasmic reticulum in muscle contraction is to

regulate inracellualr calcium cencentration

after nervous stimulation of the muschle cell has cease, the calcium:

is reabsorbed into the sarcoplasimic reticulum

creatine phosphate functions in the muscle cells by

storing energy that will be transferred to ADP to resynthesize ATP as needed

the fondition of muscle fatigue can be best explained by:

insufficient intracellular quantities of ATP due to excessive consumption

observe the list of muscle actions below, wheich fo them whould NOT be classified as ISOTONIC contraction

pushing against a stationary wall

muscle tone is

a state of sustained partial muscular contraction that is vital for the health of muscles

the most common types of body movements inclue all of the following excep:

elevation

which of the following does NOT copress the abdomen

latissimus dorsi

which of the following are composed of actin

thin filaments

a muscle group that works with and assists the action of a prime mover is a

synergist only

which of the following criteria is NOT used in naming muscles

the nerve that supplies the musles

skeletal muscle is called involuntary because it is the only typw of muscle usually subject to conscious contryl (T/F)

false

skeletal muscles need nerve stimulation for contraction to occur (T/F)

true

a nerve cell and all the muscle cells that it stimulates are referred to as a motor end plate (T/F)

false

a contraction in which the muscle does not shorten but its tension increses is called isometric (T/F)

true

the neurotransmitter used by the nervous system to activate skeletal muscle cells is acetylcholine (T/F)

true

muscle fatigue and soreness are cause by a buildup of pyruvic acid (T/F)

false

one of the important functions of skeletal muscle is to produce heat (T/F)

true

oxygen debt refers to the oxygen required to make creatine phophate (T/F)

false

a sustained partial contraction of a muscle is called muscle tone (T/F)

true

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