For each of the following movements, indicate the specific kind of joint involved (e.g., hinge, etc.) and the movement performed (e.g., extension, etc.)
a. Bending the elbow: ________, ________.
b. Turning head side to side: ________, ________.
c. Lowering your arm to your side in the frontal plane: ________, ________.
d. Turning the sole of foot medially: ________, ________.
a. hinge; flexion
b. pivot; rotation
c. ball and socket; adduction
d. plane; inversion
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The microtubule disruptor, vinblastine
A) Is derived from the autumn crocus. B) Kills dividing tumor cells by disrupting the mitotic spindle. C) Kills cells that line blood vessels, thus cutting off blood flow to tumors. D) B and C
Which transport process requires a carrier molecule but does not use cellular energy?
A. Facilitated diffusion B. Osmosis C. Diffusion D. Active transport E. Endocytosis
A graded response occurs when ________.
A. multiple muscles in a group are activated B. an individual muscle cell undergoes an all-or-none response C. multiple motor units are activated D. None of the choices are correct.
In cardiac muscle,
A) calcium ions are not released from the sarcoplasmic reticulum. B) calcium ions do not bind to troponin molecules. C) calcium ions play no role in the process of contraction. D) about 20 percent of the calcium ion required for contraction comes from outside the cell. E) calcium ions play an important role in repolarizing the membrane after the depolarization phase.