Which type of information can graded potentials convey to the central nervous system?
A) Size of environmental change
B) Same information as action potentials
C) Length of signal sent and received
D) Amount of electricity generated
A
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Vaults are non-membranous organelles shaped as ____
a. hexagons b. pentagons c. octagons d. decagons e. dodecagons
____________________are local chemical messengers whose effect is exerted only on neighboring cells in the immediate environment of their site of secretion
Fill in the blank(s) with correct word
In the reversible reaction, CO2 + H2O ? H2CO3 ? H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?
A. H+ will decrease. B. H+ will increase. C. H+ will be unchanged.
What type of tissue has little extracellular matrix because it forms covering and lining layers for body structures?
A. connective B. epithelial C. muscle