Muscle contractions

The type of muscle contraction where the muscle tenses but does not shorten.  

• Isometric
• Isotonic
• Contraction
• relaxation

When a muscle shortens under tension, it is called_______

• isotonic eccentric contraction
• isotonic concentric contraction
• isometric concentric contraction
• isometric eccentric contraction

When a muscle is under tension, it is not possible for it to be lengthening

• True
• False

Isometric exercises cannot build muscle.

• False
• True

As this athlete jumps into the air, his quadriceps undergo-

• concentric contraction
• eccentric contraction
• isometric contraction

Which uses more energy?

• isotonic contractions
• isometric contractions

What type of contraction is happening here??

• isostabilize

• isokinetic

• isotonic

• isometric

Movement is enabled by muscle

• contraction
• atrophy
• subduction
• torpor

When a muscle in under tension, it has to be shortening or lengthening, otherwise it isn't under tension.

• True
• False

Contractions are generated by

• shortening of thick filaments
• shortening of thin filaments
• sliding of thin filaments past thick filaments
• "accordian-like" folding of thick and thin filaments