4 - Movement

What is the role of acetylcholine in calcium release?

binds to sarcoplasmic reticulum, causing calcium release

A group of skeletal muscle fibers is called a/an

fascicle

Which of the following correctly identifies muscle components in order from largest to smallest?

fasciculus-muscle fiber-myofibril

Which of the following refers to a prolonged muscular spasm

myotonia

Light bands has which of the following filament protein?

actin

This event occur during muscular contraction

H-zone disappears then I band shortens then Width of A band is unaffected then M line and Z line get closer

The basic microtubular structure of cilia and flagella is called

axoneme

The membrane that is the closest to the individual muscle fiber is the

endomysium

Muscle gets fatigue due to accumulation of

lactic acid

The smallest functional unit of contraction is the

sarcomere

The space between two Z lines constitutes the

sarcomere

Both cilia and flagella are structurally

similar

The complete contraction of a muscle, without the ability to relax is called

tetanic contraction

A single contraction of a muscle is called a

twitch