Routine protocol of a non-trauma humerus entails: single AP ...

[penguins]

Routine protocol of a non-trauma humerus entails:
 
 single AP projection with the arm in external rotation
  single AP projection in neutral position, a transthoracic lateral, and a distal lateromedial projection
  two projections: one with the arm in external rotation and one with the arm in internal rotation
  single AP projection and a single transthoracic projection

Question 2

The shape of the DNA molecule is described as:
 
 ladder
  circular
  cylinder
  double helix

[tjayeee]

Answer to Question 1

two projections: one with the arm in external rotation and one with the arm in internal rotation

Rationale: Non-trauma humerus will take two projections to include the entire long bone and both joints. The arm will be changed in position for each projection; one in external rotation and one in internal rotation.

Answer to Question 2

double helix

Rationale: Two strands of DNA coil around each other to form a double helix.

[penguins]

Thanks for the timely response, appreciate it

[scottmt]

Excellent