Quiz 1: Cell Structure and Function

Name the membrane valves that open and close for potassium efflux and sodium influx.
1. ion channels
2. vacuoles
3. capillaries
4. cytokines
What is another name for programmed cell death?
1. necrosis
2. oxidative burst
3. diapedesis
4. apoptosis
When a sodium channel opens and sodium rushes into a myocyte (heart cell), the cell membrane becomes...
1. polarized
2. depolarized
3. paralyzed
4. polymerized
What role(s) does the cytoskeleton play in a living cell? (Hint: CHECK ONLY ONE ANSWER)
1. maintaining cell shape
2. movement
3. contraction
4. all of the above
What organelle serves as a primary "packaging" area for molecules that will be distributed throughout the cell?
1. mitochondrion
2. vacuole
3. cytoskeleton
4. Golgi
The endoplasmic reticulum is an extension of which of these membranes?
1. cell membrane
2. outer nuclear membrane
3. inner nuclear membrane
Which is SMALLEST of these four?
1. bacterium
2. red blood cell
3. virus
4. lymphocyte
What is the correct order of these mitotic stages?
1. prophase - metaphase - telophase - anaphase - cytokinesis
2. prophase - cytokinesis - metaphase - telophase - anaphase
3. anaphase - prophase - metaphase - telophase - cytokinesis
4. prophase - metaphase - anaphase - telophase - cytokinesis
In what stage of mitosis do all chromosomes align in one plane?
1. anaphase
2. telophase
3. prophase
4. metaphase
A cell in interphase is sometimes said to be resting. Why is this misleading?
1. interphase cells are actively dividing
2. interphase cells are synthesizing RNA and proteins, and growing in size

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