Which of the following is a classification of the severity of shock?

Which means of actuation is triggered by a product-of-combustion detector?

A. Standard operation B. Automatic operation C. Normal manual operation D. Emergency manual operation

The respiratory system functions by:

A: sending messages to the diaphragm that cause it to contract. B: removing carbon dioxide from the cells and returning it to the lungs. C: ensuring that adequate oxygen is delivered to the body's tissues. D: bringing oxygen into the lungs and eliminating carbon dioxide.