BIO114 - Chapter 6 Quiz

Actin and myosin filaments

Which of the following is found within a sarcomrere?

Oxygen

Music cells produce lactic acid when they have an inadequate supply of

Lifting weights

Which one of the following activities would fast-twitch fibers be most useful for?

Muscular dystrophy

Which of the following represents a group of muscular diseases that are hereditary, result in muscle wasting, and presently has no cure?

Voluntary

Unlike cardiac or smooth muscles, skeletal muscles are considered to be

Pacemaker cells

The cells in cardiac muscle that initiate cardiac contracts are called

Sacromere

The smallest unit of contraction in a muscle cell is referred to as a

Twitch

A complete contraction-relaxation cycle of a muscle fiber is called a

The "all-or-none principle” states that in a given muscle, all of the cells are contracting simultaneously or none of them is contracting.

False

Muscle contraction accounts for most of the heat generated by the body.

True