Plasma, the liquid component of blood, is mostly water.
Answer the following statement true (T) or false (F)
True
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In order for a neuron to be depolarized, it must receive about:
a. 50-100 stimulatory synapses b. 1000 stimulatory synapses c. 50-100 inhibitory synapses d. An equal number of stimulatory and inhibitory synapses
Angiotensin II receptor blockers prevent the vasoconstriction and aldosterone secretion stimulated by:
A. angiotensin I B. angiotensin II C. the vascular smooth muscle D. blood glucose
Lumbar punctures are performed as a diagnostic procedure to evaluate the:
A) afferent nerves. B) cerebrospinal fluid. C) spinal nerves. D) none of the above.
A 45-year-old male was stabbed in the left anterior chest. He is conscious, but restless. His skin is cool and clammy, his blood pressure is 90/60 mm Hg, his respirations are rapid and shallow, and his heart rate is 120 beats/min and weak. Further assessment reveals that his breath sounds are clear and equal bilaterally and his jugular veins are distended. In addition to giving him high-flow oxygen, you should:
A: cover the stab wound with an occlusive dressing, support ventilation as needed, and transport rapidly. B: control the bleeding from the stab wound with a sterile porous dressing and reassess his vital signs. C: suspect that the patient has a tension pneumothorax and notify the trauma center as soon as possible. D: perform a detailed physical exam at the scene to ensure that you locate and treat less obvious injuries.