Which of the following is correct?
a. Exocytosis decreases the surface area of the plasma membrane.
b. Endocytosis can help remove cytoplasmic debris from inside the cell.
c. Exocytosis is triggered by the binding of a particle in the ECF to a receptor site on the plasma membrane.
d. Exocytosis involves passive movement of material out of the cell.
e. None of these.
E
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Each skeletal muscle is composed of ________, which are bundles of muscle fibers.
Fill in the blank(s) with the appropriate word(s).
This figure shows a lymph node and its components. The region indicated by number 1 is a
A. germinal center. B. mantle zone. C. cortical sinus. D. medullary cord. E. medullary sinus.
The action of a hormone on a target cell involves effects on _________.
A) receptor proteins. B) nonreceptor proteins. C) receptor proteins and lipids. D) receptor and nonreceptor proteins. E) lipids.
Loss of equilibrium and motor coordination would most likely be related to a lesion in which structure?
A) Pituitary gland B) Medulla oblongata C) Cerebellum D) Limbic system E) Pons