A 45-year-old unrestrained man was ejected from his small truck when it struck a tree. The patient is found approximately 20 feet from the wreckage. Your primary assessment reveals that he is unresponsive and has sonorous respirations and a rapid pulse. Your initial actions should include:
A) applying a cervical collar and assisting his ventilations with a bag-mask device.
B) rolling the patient onto his side as a unit and suctioning his mouth for 15 seconds.
C) performing a tongue-jaw lift and looking in his mouth for any obvious obstructions.
D) manually stabilizing his head and opening his airway with the jaw-thrust maneuver.
Answer: D) manually stabilizing his head and opening his airway with the jaw-thrust maneuver.
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Upon examination of a zygote, a developmental biologist discovers that it possesses 47 chromosomes. What does this indicate?
A. Either the sperm or the egg had one less chromosome than normal as the result of a meiotic error B. Either the sperm or the egg received an extra chromosome as the result of a meiotic error C. The zygote is a normal, healthy diploid zygote D. The zygote resulted from polyspermy (multiple fertilizations of the same oocyte) by two sperm cells
The sodium-potassium exchange pump
A) must re -establish ion concentrations after each action potential. B) transports sodium ions into the cell during depolarization. C) requires ATP to function. D) moves sodium and potassium in the direction of their chemical gradients. E) transports potassium ions out of the cell during repolarization.
he delicate connective tissue that surrounds the skeletal muscle fibers and ties adjacent muscle fibers together is the
What will be an ideal response?
Which of the following facial muscles raise(s) the corners of the mouth for smiling and laughing?
A. Mentalis and platysma B. Depressor anguli oris C. Orbicularis oris D. Buccinator E. Zygomaticus major and minor