Intercalated discs are cell-cell junctions found between cardiac muscle cells. One feature of these intercalated discs is that they contain a large number of gap junctions, which means that _____
A) an extension of smooth endoplasmic reticulum goes through the gap junction, making it continuous from one cardiac muscle cell to the next
B) water ions and small molecules can readily pass from one cardiac muscle cell to the next
C) cardiac cells can function independently when necessary
D) RNA from one cardiac muscle cell can be transported into an adjacent cell through the gap junction
Answer: B
You might also like to view...
The hypothesis that high pressure forces phloem sap to flow was tested and supported by studies using ____
a. caterpillars b. radiolabeled hormones c. vacuum chambers d. aphids e. radiolabeled sugars
Suppose sugar is taken out of an excretory system tubule and back into the blood. This would be an
example of
a. reabsorption. b. release. c. filtration. d. secretion. e. diffusion.
To determine the dietary habits of dinosaurs, their _____ can be analyzed for the presence of undigested plant material
or bones.
a. coprolites b. eggs c. fossilized body parts d. footprints e. soft body parts
The largest source of radiation people are exposed to in the United States is from _____________
A. medical X-rays D. radon B. cosmic rays E. nuclear medicine C. consumer products