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With the osmolarity of the average vertebrate being around300mOsml, and salt water having an osmolarity of 1000mOsml, whydoes the water from the shark not leave to the salt water aroundit?
I presume the scales must act as a barrier to stop water formleaving, but with the blood vessels being exposed to the salinewater in the gills, why does water not leave the body?
Question #06: Basic functions of Renal, CV and Respiratory Systems The question for this week is as follows: Name the physiological responses and/or the relationships among buffers, respiratory, circulatory and renal systems involved in the homeostatic control following a metabolic acidosis. It is an absolute requirement that you answer this question based on the outline below. Precede each section of your answer with its heading, and make sure you answer ALL aspects outlined in each section. Hint: for this question you really have to think on âthe circleâ. The following are the section headings and their requirements: a) the example: which are the physiological responses and/or relationships among buffers, respiratory, circulatory and renal systems on which your answer will be based. Which was the origin of the metabolic acidosis in your example. Be as specific as you can in delimiting the boundaries of your example and the level(s) of organization your example will involve. b) the buffer involvement: how does the buffer system attempt to control the homeostatic variable (blood pH). Which, how and where is the signal to the buffer system recognized as input (receptors, afferent loop, and integration center), and how did the output of the integration center reached their targets (efferent loop, targets). The response this signal elicits is an acute (fast) or chronic (slow) compensatory mechanism. c) the respiratory involvement: how does the respiratory system attempt to control the homeostatic variable (blood pH). Which, how and where is the signal to the respiratory system recognized as input (receptors, afferent loop, and integration center), and how did the output of the integration center reached their targets (efferent loop, targets). The response this signal elicits is an acute (fast) or chronic (slow) compensatory mechanism. d) the circulatory involvement: how does the circulatory system attempt to control the homeostatic variable (blood pH). Which, how and where is the signal to the cardiovascular system recognized as input (receptors, afferent loop, and integration center), and how did the output of the integration center reached the targets (efferent loop, targets). The response this signal elicits is an acute (fast) or chronic (slow) compensatory mechanism. e) the renal involvement: how does the renal system attempt to control the homeostatic variable (blood pH). Which, how and where is the signal to the renal system recognized as input (receptors, afferent loop, and integration center), and how did the output of the integration center reached the targets (efferent loop, targets). The response this signal elicits is an acute (fast) or chronic (slow) compensatory mechanism. f) the integration pathways: how (the sensor, afferent, integrator, efferent, effector and feedback signals) and in which order (buffers, respiratory, cardiovascular, kidney) were the physiological systems involved, and recruited to participate in the homeostatic response to a metabolic acidosis. The most important component of this answer is: Why do you think such a sequential order in this homeostatic response was achieved? Please notice that this subquestion does NOT ask you to tell me what is the order, but it asks why that order occurred.
