14.4 Pre assessment Muscle Contraction

This is an increase in tension or a decrease in the length of a muscle

• muscle tension

• muscle contraction

• muscle twitch

• muscle relaxation

This is the force exerted by the muscle on a bone or other object.

• muscle tension

• muscle contraction

• muscle twitch

• muscle relaxation

Which type of muscle contraction would occur if you are holding a book in the same position?

• isotonic

• isometric

• static

• contractile

Which type of muscle contraction would occur if you raised a book by bending the arm at the elbow?

• isotonic

• isometric

• contractile

• static

The brain sends electrochemical signals through the _____________ to the motor neurons that excite muscle fibers

• autonomic nervous system

• parasympathetic nervous system

• somatic nervous system

• sympathetic nervous system

A single __________________ is able to excite multiple muscle fibers.

• motor neuron

• axon terminal

• dendrite terminal

• mylan sheath

The connection between a motor neuron axon terminal and a muscle fiber occurs at a site called a

• motor union junction

• neuromuscular junction

• axon junction

• dendrite junction

During a _______________ a motor neuron transmits a signal to a muscle fiber to initiate a muscle contraction.

• synapse

• cation

• anion

• ionic pulse

What is released once the action potential reaches the end of the axon terminal?

• neurotransmitter

• toxic material

• neurojunction

• myosin

Which is an example of a neurotransmitter?

• acetylcholine

• calcium

• sodium

• hydrochloride