Which type of junctions involves closable channels that connect the cytoplasm of adjoining animal cells?
a. gap junctions
b. plasmodesmata
c. tight junctions
d. adhering junctions
e. blocking proteins
a
You might also like to view...
Which of the following characteristics is shared by a hagfish and a lamprey?
A) a rasping tongue B) paired fins C) jaws D) a well-developed notochord
What causes the inactivation of a G protein?
A. The alpha subunit hydrolyzes GTP to GDP and inorganic phosphate. B. The beta and gamma subunits trigger the hydrolysis of GTP to GDP. C. A phosphatase removes the inorganic phosphate group from GTP. D. The inactive receptor catalyzes the replacement of GTP by GDP.
Proper storage of cerebrospinal fluid (CSF) sent to the laboratory for bacterial culture includes:
a. refrigeration for up to 23 hours. b. freezing at 70°C. c. incubation at 35°C. d. freezing at temperatures above 70°C.
In the periodic table, the value that refers to the number of protons and neutrons is:
A. atomic mass. B. molecular molarity. C. atomic molarity. D. molecular number.