During a single contraction, each myosin molecule undergoes the cycle of cross-bridge formation, movement, release, and return to its original position many times. This process is called _______.

a. excitation-contraction coupling
b. cross-bridge cycling
c. the power stroke
d. the recovery stroke


Ans: b. cross-bridge cycling

Anatomy & Physiology

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An atom has 6 electrons, 6 protons, and 6 neutrons. You can tell that this atom belongs to the element _____ because _____________________.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

By making two covalent bonds, an O atom (with 8 protons) fills its valence shell. Why does the atom's charge stay close to zero?

What will be an ideal response?

Anatomy & Physiology

The portion of the intervertebral disk that ruptures is the ____________________.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

The anterior and posterior cruciate ligaments help to stabilize the __________ joint.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology