Of the following actions, the one that illustrates that of a second-class lever is (a) knee extension, (b) ankle extension (plantar flexion), (c) flexion at the elbow, (d) none of these.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

d. The joint between the two pubic bones and the intervertebral joints are examples of symphyses.

In general, when mobility of a joint______, its stability_______.

a. increases; increases

b. decreases; decreases

c. increases; remains unchanged

d. increases; decreases

Bone movement at a joint is described around an invisible line known as a/an:

a. synarthrosis.

b. axis.

c. sagittal plane

d.amphiarthrosis.