What type of junction allows electrical signals to rapidly spread from cell to cell?
a. tight junctions
b. elastic junctions
c. basement membranes
d. desmosomes
e. gap junctions
ANSWER: e
You might also like to view...
Which of the following taxa are extant (have at least some members that are still living; opposite of extinct)?
A. Ornithischia B. Lepidosauria C. Saurischia D. theropods E. ichythosaurs
What is a requirement for glycolysis to proceed?
a. Glucose must enter the mitochondria. b. There must be an input of energy from ATP. c. Oxygen must be available. d. Heat must be supplied. e. Carbon dioxide must be available.
Oxygen concentrations are relatively high in the bottom ooze of lakes and ponds
Indicate whether the statement is true or false
Which of the following is an incorrect statement about the regulation of populations?
A) The logistic equation reflects the effect of density-dependent factors, which can ultimately stabilize populations around the carrying capacity. B) Density-independent factors have an increasingly greater effect as a population?s density increases. C) High densities in a population may cause physiological changes that inhibit reproduction. D) Because of the overlapping nature of population-regulating factors, it is often difficult to precisely determine their cause-and-effect relationships. E) The occurrence of population cycles in some populations may be the result of crowding or lag times in the response to density-dependent factors.