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BIOL 224 Quiz: Biology 224 Lab Quiz #1 Flashcards

4 Pages

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BIOL 224
Tracy Marchant

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Lab #1: Q: Why does pulse amplitude spike momentarily when ice is removed from arm? A: The body tries to compensate for loss of blood flow when the ice is placed on the arm Q: why does pulse amplitude increase as ice is removed from arm? A: As ice is removed, blood vessels dilate, which results in an increase in pulse amplitude Q: Why does pulse amplitude decrease when ice is placed on the arm? A: When ice is added to the arm, blood vessels decrease in size, causing a decrease in pulse amplitude Q: Crickets are _________ that are dependent upon external sources for body heat. A: Ectotherms Q: What causes ventricles to contract? A: Depolarization of the myocardial cells in the ventricles Q: What do we use to measure the pulses of blood moving through the arteries? A: Plethysmograph Q: Located within the ______ there are specialized sensory receptors that are sensitive to changes in temperature. A: Dermis Q: Once activated, these peripheral thermoreceptors send signals to the ____________ that in turn causes a physiological change that includes an alteration in blood flow. A: Hypothalamus Q: The volume of blood traveling through arteries can be increased or decreased by... A: Altering the diameter of the arteries Q: When arteries located in peripheral tissues undergo __________there is less blood supplied to the tissue and a decrease in pulse amplitude is observed as a result of the decrease in peripheral blood flow. A: Vasoconstriction Q: _________ of peripheral arteries results in an increase in peripheral blood flow and an increase in the amount of blood supplied to those tissues. A: Vasodilation Q: The x axis represents the ______ variable and the y axis represents the _______ variable A: x = Independent y = Dependent Lab #2: Q: Stimulus from inner or outer environment is detected by the sensory receptors, or ________, which then sent this information to the ________. A: Neurons; Central Nervous System Q: Nervous system integration can be defined as... A: The generation of a motor output based on the sum of the sensory inputs. Q: Reaction time is… A: The time from the start of a signal to the response Q: The factors that affect reaction time are… A: Signal complexity, duration and strength Q: there are three ways in which the sensory system stimulated affects reaction time... A: 1) there are differences in afferent conduction times between sensory systems. 2) some sensory systems can change instantly while others change more slowly. 3) certain sensory systems are more sensitive. Reactions are voluntary responses that can be modified through learning. Q: Visual-Motor Learning is described as… A: The process of increasing accuracy, speed and coordination of tasks involving eye-hand coordination the more often we perform them Q: What does the SEM do? A: Lets us know how much the reaction time varies amongst students Q: How do prism goggles im
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