John goes to his physician's office for his annual physical. This is an example of

As you pull up to a motor vehicle collision, you quickly scan the scene for clues as to the type and severity of injuries. What observation would best indicate that a patient may have a head injury?

A) Air bag deployment B) Starring of a windshield C) Blood on a patient's clothing D) Frontal-type collision

Which of the following factors affect cardiac performance? 1. Preload 2. Afterload 3. Contractility 4. Cardiac output

a. 1 and 2 only b. 1 and 3 only c. 1, 2, and 3 only d. 1, 2, 3, and 4