What are desmosomes?
A. Low-resistance channel-like passages that let ions travel between the interiors of adjacent cells
B. Membrane-bound vesicles that pinch off from the plasma membrane and enter the cell
C. Cellular organelles that transcribe RNA into DNA
D. Cell organelles that contain enzymes for digesting cellular debris and foreign microbes
E. Dense plaques of proteins that maintain firm attachments between adjacent cells
Answer: E
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The barrier between the ECF and the ICF is the __________
Fill in the blank(s) with correct word
In your anatomy and physiology laboratory, you look at prepared slides of developing bone. In the epiphyseal plate region, you note the chondrocytes are slightly enlarged and stacked in a longitudinal array. What epiphyseal plate zone is in your field of view?
a. zone of rest b. zone of proliferation c. zone of hypertrophy d. zone of calcification
A CT scan allows for a three-dimensional image to be generated
Indicate whether the statement is true or false.
The first signal during helper T-lymphocyte activation involves
A. BCR of the helper T-cell binding with free antigen and engulfing it. B. CD4 of the helper T-cell binding with MHC class I part of the antigen fragment. C. CD4 of the helper T-cell binding with MHC class II of the antigen-presenting cell. D. CD8 of the helper T-cell binding with MHC class III of the antigen-presenting cell.