Muscular System Test

Front

What is the correct order of muscle structures from largest to smallest?

Back

Whole muscle, muscle fascicle, muscle fiber, myofibril, actin & myosin.

Front

Which system does the muscular system primarily depend on for operation?

Back

Nervous system.

Front

What is the term for the neuron and the collection of muscle fibers it innervates?

Back

Motor unit.

Front

What do skeletal muscles require in order to contract?

Back

Energy.

Front

What is the part of a skeletal muscle from Z-line to Z-line called?

Back

Sarcomere.

Front

What is the function of actin and myosin in muscle contraction?

Back

They interact to produce muscle contraction.

Front

What role does calcium play in muscle contraction?

Back

Calcium ions are released to initiate contraction and are transported back to relax the muscle.

Front

What is a muscle fascicle?

Back

A bundle of muscle fibers.

Front

What is the role of the sarcoplasmic reticulum in muscle cells?

Back

It stores calcium ions and releases them during muscle contraction.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are controlled consciously, while involuntary muscles operate automatically.