Tag Archives: Biology

Cerebrospinal Fluid Producers

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Cerebrospinal fluid (CSF) is created by special capillary networks located in the brain. CSF bathes the hollow regions of the brain, spinal cord, and around the central nervous system, within its protective coverings. The areas that the CSF pathway includes are:

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Nerve Impulse Propagation

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The velocity of nerve impulse propagation could be increased by:

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Gastrin Secretion

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Which of the following statements is NOT true regarding gastrin secretion and function?

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Decreasing Activity of an Enzyme

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Some enzymes experience a decrease in activity proportional to the concentration of their products. This phenomenon could be an example of what process?

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Mechanism of Cyanide

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The lethal poison cyanide causes death by interfering with cellular respiration. What is cyanide’s mechanism of toxicity?

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Mammalian Zygote

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Once a mammalian zygote has become a blastocyst and implants itself into the uterine wall, it will develop into?

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Inhibition by Penicillin

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Penicillin exerts its effect on bacterial growth through inhibition of cell-wall synthesis. This antibiotic blocks the last step in the formation of the cell wall. Glycopeptide transpeptidase is a bacterial enzyme that catalyzes the cross-linking reaction between peptidoglycan molecules, which are the main constituents of the cell wall. Penicillin inhibits the enzyme by binding covalently to its active site. The penicillin-enzyme complex cannot react further.

This is an example of:

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Genetic Drift Effects

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Genetic drift is the process responsible for:

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Catabolic Process

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Which of the following is an example of a naturally occurring catabolic process?

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Aldosterone Release

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If the hormone aldosterone is released in the bloodstream, which of the following is most likely to occur?

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