Which of the following is not a characteristic of nervous tissue?
A) Some of its cells send electrochemical messages.
B) Its cells sense changes in their surroundings.
C) It is found in the brain and spinal cord.
D) Its intercellular space is filled with collagen.
D
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Which of the following is a serous membrane that extends from the lesser curvature of the stomach to the liver?
A. Mesentery B. Falciform ligament C. Mesocolon D. Lesser omentum E. Greater omentum
Which of the following statements about synaptic potentials is FALSE?
a. they vary with size of stimulus b. they decay with distance c. they may be depolarizing or hyperpolarizing d. the # of ligand-gated ion channels at synapse has no effect on their size
Immediately following a dialysis treatment, a middle-aged woman complains of generalized weakness and nausea. Her blood pressure is 80/50 mm Hg, pulse rate is 40 beats/min and weak, and respirations are 22 breaths/min and regular. She is receiving supplemental oxygen, and an IV line has been established in the extremity opposite the shunt. The ECG reveals sinus bradycardia in lead II. Your next action should be to:
A) obtain a 12-lead ECG tracing. B) administer 0.5 mg of atropine sulfate. C) administer a 20-mL/kg fluid bolus. D) administer calcium and bicarbonate.
Substances that cause facilitation of a neuron ______.
Fill in the blank(s) with the appropriate word(s).