Anatomy and Physiology Quiz: Muscles

Myofibrils are composed of individual:

• sarcomeres

• striations

• myofilaments

• fascicles

Muscles are held in place and covered by:

• endomysium

• fascia

• sarcomeres

• tendons

The functional unit of a muscle is the:

• neuron

• reticulum

• Z line

• sarcomere

Thin filaments within a muscle fiber are called:

• actin

• striation

• sarcolemma

• myosin

This substance will cross the neuromuscular junction to communicate with individual muscle fibers:

• acetylcholine

• mitochondria

• sarcolemma

• fascia

The energy source for muscle contractions is:

• ATP

• cholinesterase

• glucose

• calcium

The A band in a myofibril is an area of:

• thin filaments

• thick filaments

• transverse tubules

• motor end plates

A sarcomere is defined as the section of fiber between:

• Z lines

• A lines

• I Bands

• H zones