Proteins called ________ are channel proteins that allow the passage of metabolites between neighboring cells.
Fill in the blank(s) with the appropriate word(s).
communicating junctions
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Answer the following statement(s) true (T) or false (F)
1. Incompatibility of one person's blood with another results from the action of plasma antibodies against the RBCs' antigens. 2. Circulating WBCs spend most of their lives in the bloodstream. 3. Lymphocytes secrete antibodies, coordinate action of other immune cells, and serve in immune memory. 4. Monocytes differentiate into large phagocytic cells.
Which of the following is NOT one of the three layers of tissue that forms the eyeball?
A. Conjunctiva B. Sclera C. Choroid D. Retina
The opposite of eversion is ________.
A. inversion B. flexion C. protraction D. pronation E. elevation
Cleavage
A. involves mitosis. B. occurs immediately after fertilization. C. is cell division with no increase in size. D. All apply.