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33 Cards in this Set
- Front
- Back
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T or F: For osmosis to occur, a selectively permeable membrane must be present |
True |
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What are functions of the cell nucleus? |
1. DNA Synthesis 2. Spindle formation for mitosis 3. Ribosome synthesis |
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What is the function of the mitochondrion? |
- energy production |
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What is the function of Endoplasmic Reticulum? |
synthesis of lipids, steroids, and glycogen |
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What is the function of ribosomes? |
synthesis of protein |
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What is the function of the Golgi Apparatus? |
Packaging of proteins for export |
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What is the function of Lysosomes? |
Phagocytosis of bacteria and waste |
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What is the function of Centrioles? |
form spindle fibers during cell division |
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T or F: Rough endoplasmic reticulum appears rough because there are ribosomes attached to it. |
True |
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T or F: Lysosomes sometimes kill cells instead of protecting them |
True |
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What are examples of passive transport? |
1. facilitated diffusion 2. filtration 3. osmosis |
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What is not an example of passive transport? |
- endocytosis |
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What is a solution that contains a higher concentration of alt than a living red blood cell? |
Hypertonic |
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T or F: Active transport processes that utilize carrier molecules, or pumps, do not use cellular energy but rely on concentration gradients |
False |
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T or F: The sodium-potassium pump is an example of a passive transport process. |
False |
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What is the order of the phases of cellular division during mitosis? |
1. Prophase 2. Metaphase 3. Anaphase 4. Telophase |
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What happens during prophase? |
paired chromosomes appear and centrioles move to opposite ends of the cell |
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What happens during metaphase? |
paired chromatids align in the center of the cell |
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What happens during anaphase? |
centromeres split and chromosomes move to opposite ends of the spindles |
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What happens during telophase? |
the cell splits into two identical cells |
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During this stage of mitosis, the spindle fibers attach to each chromatid |
metaphase |
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T or F: mitosis occurs only in sex cells such as the ovary and testes |
False |
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T or F: Cells of the skin and digestive tract replicate more rapidly than those of the brain and spinal cord. |
True |
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Define Hypertrophy |
increase in size of cells in response to increased workload |
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Define Hyperplasia |
increase in number of cells due to increase in rate of cell division |
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Define atrophy |
decrease in size or number of cells in response to disease or disuse |
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define dysplasia |
abnormal differentiation resulting in cells of abnormal size, shape, and appearance |
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define necrosis |
death of cells due to damage of some type |
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Define neoplasm |
abnormal proliferation of cells resulting in large than normal number of cells in a small area |
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T or F: A benign and malignant tumor are both examples of neoplasms |
True |
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T or F: A cervical pap test may show "precancerous" cells. This is an example of dysplasia |
True |
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What is the basic unit of structure and function in the human body? |
cell |
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What is not a component of a cell? a. cytoplasm b. cell membrane c. organelles d. blood plasma |
d. blood plasma |
