The posterior vertebral arch in the lumbar vertebrae is formed by ...

[lb_gilbert]

The posterior vertebral arch in the lumbar vertebrae is formed by the union of:
 
 the transverse process and lamina
  the two laminae
  both pedicles
  the pedicle and lamina

Question 2

Bit depth is defined as:
 
 the grayscale demonstrated in the matrix
  the size of the pixel
  the gray demonstrated by each pixel
  differences in the shades of gray

[perkiness]

Answer to Question 1

the two laminae

Rationale: The union of the two laminae most posteriorly will close off the posterior vertebral arch.

Answer to Question 2

the gray demonstrated by each pixel

Rationale: Bit depth influences the range of gray shades that can be demonstrated. The numerical value of the gray for each pixel is a bit. The greater the bit depth the greater the contrast resolution.

[lb_gilbert]

TYSM

[bigcheese9]

Excellent