A car strikes a tree causing the passenger to strike his forehead against the dashboard. After the impact, the brain bounces back and forth within the skull. Based on the anatomy and physiology of the skull, which one of the following is TRUE?
A) The frontal bone is the thinnest portion of the skull and most easily fractured.
B) The brain will not be injured since the flexibility of the skull will absorb the force of the impact.
C) The brain will not be injured unless an object on the dashboard penetrates the skull.
D) The ridges of the basilar skull can injure the brain as it moves back and forth.
Question 2
You arrive on the scene of the local steak restaurant. You find a 34-year-old man that is standing by the table grabbing at his throat. He is trying to cough and you hear high-pitched sounds coming from his airway. Which of the following BEST describes his respiratory problem?
A) Complete airway obstruction
B) Partial airway obstruction with poor air exchange
C) Lower airway obstruction
D) Partial airway obstruction with adequate air exchange
Leopard in a tree
The Passenger Pigeon—a Recent Extinction Example
Language tree
phylogenetic tree
Evolutionary Tree
Evolutionary tree for the living amniote groups