What Does One Dobson Unit (DU) Equal

question 13

Multiple Choice

What does one Dobson unit (DU) equal?

• A) 1 ppb
• B) 1 ppm
• C) 100 ppb
• D) 100 ppm

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Definitions:

Sagittal Suture

A fibrous joint that connects the two parietal bones of the skull, running from the front to the back of the head.

Sternocostal Synchrondrosis

A type of joint where the first rib meets the sternum, characterized by its cartilaginous connection that allows for some movement.

Costochondral Joint

The articulation between the costal cartilages and the ends of the ribs, contributing to the chest wall's flexibility.

Sternal Symphyses

Joints located where the cartilage connects the rib bones to the sternum, allowing for flexibility and movement during breathing.