skeletal muscle chapter 10

muscle cells are said to have what characteristic because they can respond to stimulation from the nervous system?

excitability

each muscle fiber is controlled by one --- neuron.

motor

a motor unit is composed of a single --- and all of the muscle fibers it controls.

motor neuron

a single motor neuron and the skeletal muscle fiber it controls is called a

motor unit

muscle fibers contain cylindrical structures called myofibrils, which are composed of

myofilaments

neurons that stimulate muscle contractions are called --- neurons.

motor

posture and production of heat are functions of---muscle.

skeletal

somatic motor neurons innervate--- muscle.

skeletal

in a motor unit, a single --- neuron typically controls numerous muscle fibers in a muscle.

somatic

select all that apply: a neuromuscular Junction contains a(n)

synaptic cleft motor end knob synaptic knob

a thick cord like structure that attaches a muscle to a bone is called a(n)

tendon

true or false skeletal muscle is usually attached to the skeleton, but is also found at the openings between the digestive tract and the external environment and the urinary tract and the opening to the external environment.

true

match each muscle unit with the connective tissue layer that surrounds it

-muscle: epimysium -fascicle: perimysium -muscle cell: endomysium

the connective tissue layers and muscle provide protection, distribution sites of blood vessels and nerves, and a means of--- to the skeleton.

attachment

a muscle fiber is what level of organization in the body?

cellular

the epimysium of a muscle is composed of --- connective tissue.

dense irregular.

muscle tissue demonstrates the property --- when it is done contracting and it returns to its resting length.

elasticity

muscle tissue demonstrates the property of --- when it it done contracting and returns to its resting place.

elasticity

in a muscle there are concentric layers of connective tissues. From Deep to superficial these connective tissue layers are the ---,---,and the ----.

endomysium perimysium epimysium

the epimysium of a muscle surrounds

entire skeletal muscle

the three connective tissue layers surrounding the individual components of a muscle are the-----.

epimysium, perimysium, endomysium

in a transverse section of a muscle, you can see that each skeletal muscle is actually composed of many --- , which are bundles of muscle fibers.

fascicles

a skeletal muscle is also called a muscle

fibers

the act of shivering is an example of skeletal muscle performing what function?

heat production