A PA Wrist Projection Obtained in Slight External Rotation Demonstrates

question 4

Multiple Choice

A PA wrist projection obtained in slight external rotation demonstrates
1) superimposition of the laterally located carpal bones.
2) a closed radioulnar articulation.
3) open lateral carpal joint spaces.
4) the radial styloid in profile.

• A) 1 and 4 only
• B) 2 and 3 only
• C) 2, 3, and 4 only
• D) 1, 2, and 4 only

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Definitions:

Net Water Movement

The overall transfer of water from one location to another, often across a membrane, driven by osmosis, filtration, or other forces.

Hypotonic

A term referring to a solution having an osmotic pressure (or solute concentration) less than that of the solution with which it is compared. Compare with hypertonic and isotonic.

Hypertonic

A solution that has a higher concentration of solutes compared to the solute concentration inside the cell, leading to the movement of water out of the cell.

Isotonic

A term applied to solutions that have identical concentrations of solute molecules and hence the same osmotic pressure. Compare with hypertonic and hypotonic.