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40 Cards in this Set
- Front
- Back
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Studies of fat and thyroid cells show that fat cells have fewer mitochondria than thyroid cells. A biologist would most likely infer that fat tissue...
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requires less energy than thyroid tissue
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Which cell structure directly controls the movement of molecules into and out of the cell?
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Cell membrane
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While viewing a slide of rapidly moving sperm cells, a student concludes that these cells require a large amount of energy to maintain their activity. The organelleds that most directly provide this energy is known as...
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mitochondria
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In a cell, all organelles work together to carry out...
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metabolic processes
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Which cell organelle is most directle involved with the bonding of amino acids?
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ribosomes
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One difference between plant and animal cells is that animal cells do not have....
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Chloroplasts
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Which structure is most closely associaed with excretion?
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cell membrane
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A structure that performs a specialized function within a cell is known as...
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organelles
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What does chloroplast serve as?
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The site of photosynthesis
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What organelle is primarily in the synthesis of long chains of amino acids?
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ribosomes
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After a cell was treated wit ha certain chemical, the ribosomes stopped functioning. Which cell activity was immediately affected by its change in ribosome function?
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protien synthesis
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What would most likely happen if the ribosomes in a cell were not functioning?
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The syntheis of protein would stop.
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A structure involved in the movement of materials into a cell....
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cell membrane
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The chemical reactions involved in the synthesis of ATP occur in structure....
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mitochondria
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Which metabolic process is most clearly associated with the organelle, mitochondria?
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aerobic respiration
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Which organelles are usually found in both plant and animal cells?
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mitochondria
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Most of the reactions of aerobic cellular respiration occur within the organelle known as the.........
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mitochondria
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Whcih cellular organelle consits of proteins and lipids?
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plasma membrane
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What does the plasma membrane of a living plant cell do?
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regulates the passage of substances into and out of the cell.
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The ribosome is an organelle that functions in the process of....
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protein synthesis
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The cell theory states that....
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living organisms are composed of cells that arise from preexisting cells
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What is part of the cell theory?
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Cells come from preexisting cells.
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What is not part of the cell theory?
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New cells have nuclei identical to those of preexisting cells
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What is the basic unit structure and function in protists and monerans?
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cell
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What is consisted of a cell membrane?
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protein floating in lipids
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What statement regarding the functioning of the cell membrane of all organisms is not correct...
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The cell membrane forms a barrier that keeps all substances that might harm the cell from entering the cell.
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WHich structure is responsible for maintaining homeostasuis in all cells?
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cell membrane
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Molecules A ppasses through the membrane readily, but molecule B does not. Which describes both molecules?
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Molecule A is a simple sugar, Molecule B is a starch.
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When most proteins, fats, and carbohydrates are digested completely, they are converted to end products that....
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can easily pass through the cell membrane
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The process of active transport uses the most direct use of...
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ATP
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Cyanide is a poison that limits ability of an aniaml cell to manufacture ATP. In a cell containing a small amount of cynanide, which process would least be affected?
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diffusion
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Which process requires cellular energy?
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active transport
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The ability of certain hormones to attach to the a cell is primarily determined by
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receptor molecucles in the cell membrane
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Communication between cells is affected if there is decreased ability to produce
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hormones and nerve impulses
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To communicate between cells, many multicellular animals use
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nerve signals and hormones
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The pancreas produces one hormone that lowers blood sugar level and another that increases bloood sugat level. The interaction of these two hormones most directly helps huamns to
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maintain a balanced internal enviroonment
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Feedback mechanisms are best described as processed that help
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keep body conditions near normal, a steady state
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Whcih statemant describes a feedback mechansm involving the human pancreas?
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The level of sugar in the blood is affected by the amount of insulin in the blood
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Which sequence represents the correect order of levels of organization found in a complex organisms
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organelles->cells->tissues->organs->organ system
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Which statement descibriding the body system is correct?
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Some cells in the system may be different fro mthe other cells, but all cells work together
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