Hypotension can result from ________ .
a. low potassium
b. too little blood protein
c. heavy sodium intake
d. atherosclerosis
e. chronic stress
b. too little blood protein
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An herbivore with the ability to recognize odors and avoid toxic plants is exhibiting evidence of ____
a. predation b. herbivory c. coevolution d. optimal foraging e. mimicry
If you observe the activity at the cell membrane as the action potential passes, first you will see ________ the cell, then you will see ________ the cell
a. NA+ enter; K+ leave b. NA+ leave; K+ enter c. NA+ leave; NA+ enter d. K+ enter; NA+ leave e. K+ leave; NA+ enter
The IMViC series of biochemical tests are used to identify the Enterobacteriaceae.
a. true b. false
The protozoan that causes malaria is an intracellular parasite of red blood cells (RBCs). An adaptive immune response to this parasite is problematic because
A) red blood cells do not produce MHC and, therefore, do not display the fact that they have been infected by presenting antigen. B) the parasite damages leukocytes along with RBCs. C) RBCs normally produce cytokines necessary for adaptive immune response, which this infection prevents. D) complement cannot effectively destroy RBCs. E) RBCs never enter lymphoid tissue.