Quizizz: Muscular System

A motor unit is made up of_______

A motor neuron and the muscle fiber it innervates

The thin filament in muscle cells

Actin

This type of muscle tissue has the greatest endurance

Cardiac

Which muscle listed below is not a leg muscle

Deltoid

The protective wrapping over the entire muscle or muscle body is called the_______

Epimysium

A bundle of muscle fibers is called

Fascicle

To decrease the angel of a joint

Flex

When a muscle contracts, it_______

Gets shorter

Muscle always work_____

In pairs

The cardiac muscle is

Involuntary

The chemical that accumulates in muscles when oxygen is depleted

Lactic acid

A single muscle fiber is made of______

Myofibrils

The protein that stores oxygen in you muscle fibers

Myoglobin

The crossbridges involved in muscle contraction are located on the_____

Myosin

The thick filament in muscle cells

Myosin

Amount of oxygen need to restore levels of ATP and creating phosphate in muscle plus the amount of oxygen needed to convert the lactic acid back into glucose

Oxygen debt

Which muscle type is found un your stomach, bladder, and intestine

Smooth

Into what does the neuron release it's neurotransmitter at the neuromuscular junction

Synaptic cleft

Rope-like tissue that connects bone to muscle

Tendon

Which of these statements is correct regarding muscle contraction

The crossbridges bing to the actin and shorten the sarcomeres

Abduct

To move away from the midline of the body

Adduct

To move toward the midline

The segment of a myofibrils that is called a sarcomere runs from____

Z-line to Z-line

Which term is the smallest subdivision in this group?

actin