Which lymphoid organ serves in immune surveillance and in filtering lymph?
A. tonsils
B. the spleen
C. the thymus
D. lymph nodes
Ans: D. lymph nodes
Lymph nodes function as lymph filters and immune surveillance units. They exist in large numbers and are located everywhere in the body, with the exception of the bones, teeth, bone marrow, and the entire central nervous system.
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The auditory cortex is located in which lobe of the cerebrum?
A. Frontal B. Parietal C. Occipital D. Temporal
Select the primary buffer system in the ECF
a. bicarbonate/carbonic acid b. chloride/hydrochloric acid c. hemoglobin d. phosphate e. protein
The distribution of Na+ and K+ between intracellular and extracellular compartments is ________.
A. K+ mainly intracellular; Na+ mainly in extracellular B. Na+ mainly intracellular; K+ mainly in extracellular C. equal amounts of both ions, in both intracellular and extracellular fluids D. little of either intracellular but large amounts of both extracellular E. None of the choices are correct.
What are the four types of sensory receptors for the general senses? What is the nature of the stimuli that excite each type?