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Which of the following statements is true

striated muscle cells are long and cylindrical with many nuclei

which of th efollowing are composed of myosin

thick filaments

muscle tissue has all of the following properties except___


when a muscle is unable to respond to stimuli temporarily it is in which of the following periods

refractory period

the oxygen-binding protein found in muscle cells is


the condition characterized by drooping eyelids, muscle weakness. I ti s more common in females

Myasthenia Gravis

The muscle cell membrane is called the


After nervous stimulation stops what prevents ACh in the synaptic cleft from continuing to stimulate contraction?

Acetylcholinesterase destroying the ACh

Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the ____ period during which the vents of excitation-contraction coupling occur


the term central nervous system refers to the

brain and spinal cord

what are ciliated CNS neuroglia that play an active role in moving and producing the cerebrospinal fluid called

ependymal cells

Which ion channel opens in response to a change in membrane potential (charge) and participates in the generation and conduction of action potentials

Voltage-gated channel

which of the following is not a function of the autonomic nervous system

innervation of the skeletal muscle

which of the following is not a function of astrocytes

provide the defense for the CNS

Bruising of the quadriceps femoris and a blood clot was produced


which of the following is not true of end plate potentials

They are unstoppable

Which of the following is not a special characteristic of neurons

the are mitotic

Immediately after an action potential has passed, which cellular gates open


schwann cells create

the myelin sheath

which of the choices below describes the ANS

Motor fivers that conduct nerve impulses from the CNS to smooth muscles, cardiac muscle, and glands

The part of a neuron that conducts impulses away from it's cell body is called an


What is the resting state of a muscle cell

negatively charged and contains less sodium

Shcwann cells are functionally similar to


The disease where muscle atrophies but actually enlarges due to fat and connective tissue deposits in the muscle. Strikes between 2-10

Muscular dystrophy

The 3 functions of the nervous system include all of the following except


what is the smallest contractile unit of muscle

a sarcomere

What is the role of tropomyosin in skeletal muscles

Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules

Excitation-contraction coupling requires which of the following substances

Ca + ATP

what structure in skeletal muscle cells functions in calcium storage

sarcoplasmic reticulum

ATP is used in the following stages/functions of muscle contraction except for

to move the neurotransmitter across the synaptic cleft

What produces the striations of a skeletal muscle cell

the arrangement of myofilaments

During muscle contraction, myosin cross bridges attach to which active sites

actin filaments

During contraction of a muscle fiber thick filaments attach to thin filaments and make


the remnents of the schwann cell is also called the


the giant protein titin maintains the organization of the ______ assisting in muscle stretching

A band

Muscle tone is _______

a state of sustained partial contraction

A sarcomere is the distance between two

Z discs

The ____ contains only the actin filaments

I band

The thicker filaments are the _____ filaments


Both actin and myosin are found in the ______

A band

The myosin filament are located in the _____

A band

The sliding filament model of contraction involves

Actin and myosin sliding past each other and partially overlapping

what part of the sarcolemma contains acetylcholine receptors

Moter end plate

Only _____ muscle cells are always mutinucleated


Only ____ muscle cells commonly branch


That part of the nervous system that is voluntary and conducts impulses from the CNS to the skeletal muscles is the _____ nervous system


A gap between schwann cells in the peripheral system is called

Nodes of Ranvier

____ potentials are short-lived, local changes in membrane potential

End plate

______ muscle is spindle shaped and uninucleated


____ receive impulses and transmit them to the soma of the neuron


_____ transmits impulses away from the soma to another neuron of effector cell


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