You may have noticed that many of the cells involved in immunity have more than one function. The T lymphocytes are no exception. Along with killing viruses and bacteria, they also attack eukaryotic cells such as tumor cells or
a. viruses
b. prokaryotic invaders.
c. eukaryotic parasites.
d. worms such as hookworms.
e. prions.
C
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According to the multiregional hypothesis of human origins, modern H. sapiens evolved via _____ from _____ of H. ergaster
A. convergent evolution; multiple Old World populations B. adaptive radiation; a single Old World population C. parallel evolution; multiple Old World populations D. allopatric speciation; a single Old World population E. peripatric speciation; a single Old World population
Which of the following carbohydrates form
highly branched chains of glucose monomers?
a. glycogen b. cellulose c. fructose d. starch e. sucrose
What causes a membrane potential to return to the normal negative value after an action potential has occurred?
a) opening of a voltage-gated K+ channel b) opening of a voltage-gated Na+ channel c) opening of a ligand-gated Na+ channel d) opening of a voltage-gated K+ facilitated transporter e) closing of a voltage-gated K+ channel
How is HPS (hantavirus pulmonary syndrome) treated?
A. with antibiotics B. with oxygen therapy C. with chemotherapy D. with electrolyte and fluid replacement E. none of the choices is correct