Question

12 multiple choice 1 point which articulation of the upper extremity is a saddle joint that allows the thumb to oppose the fingers? distal radioulnar proximal radioulnar radiocarpal first caropmetacarpal 13 multiple choice 1 point which bones are located in the proximal row of the wrist? scaphoid, lunate, pisiform, and triquetrum trapezium, trapezoid, capitate, and hamate scaphoid, lunate, capitate, and hamate trapezium, trapezoid, pisiform, and triquetrum

Explanation:

1. The first carpometacarpal joint is a saddle - joint that allows the thumb to oppose the fingers. The other joints listed do not have this function.
2. The proximal row of wrist bones consists of the scaphoid, lunate, pisiform, and triquetrum. The other options list combinations that include bones from the distal row or incorrect combinations.

Answer:

1. D. First carpometacarpal
2. A. Scaphoid, lunate, pisiform, and triquetrum