What does light absorption trigger during phototaxis?
a. rapid changes in the concentrations of ions, including potassium and oxygen
b. rapid changes in the concentrations of ions, including sodium and oxygen
c. rapid changes in the concentrations of ions, including sodium and calcium
d. rapid changes in the concentrations of ions, including potassium and calcium
Ans: d. rapid changes in the concentrations of ions, including potassium and calcium
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a. primary b. secondary c. late d. tertiary
Actin filaments are anchored at junctions called
a. adherens junctions. b. tight junctions. c. desmosomes. d. gap junctions. e. hemidesmosomes.
The Mononuclear phagocytic system (or Reticuloendothelial system )
A) is extrinsic to the immune function. B) provides a passageway within and between tissues and organs. C) exists separately from phagocytic cells. D) is heavily endowed with red blood cells called erythrocytes.
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A) bacteria B) parasitic worm larva C) fungus D) protozoal parasite E) virus