Firstly, you don't have to answer them all I know it's a lot, I'm sorry.
I answered about 60 or 70 questions from my textbook throughout the week to study for my homeostasis test, and most of it I understand but here are some of the questions that I am still unsure about or just don't undersand at all. I posted on the forum earlier with some other questions but then I came across some more:P So here they are. Any help would be much appreciated. Thank you so much !
1. Athletes now undergo random urine testing for drugs. From your knowledge of excretion, describe the pathway of substancs such as drugs through the urinary system, from the time they enter the glomerulus until they are excreted as urine.
2. Can someone explain to me the purpose of secretion? I dont get it. Why does waste have to be taken from the blood stream and put back into the nephron? Didn't everything already get filtered through the glomerulus? Sorry if it's a stupid question I'm just having a difficult tim understanding the urinary system lol
3. Marine fish, such as herring and cod, live in a hypertonic environent. These fish lose water through their gills by osmosis.To replace the water, the fish drink seawater.
a) Explain why these fish must actively transport salt from their bodies.
b) Because these fish excrete salt through their gills, kidney function is affected. Explain the effect on volume of urine excreted and the concentration of solutes in the urine.
4. What does salt have to do with ADH?
5. A patient complains about losing his sense of balance. A marked decrease in muscle coordination is also mentioned. Which area of the brain might a physician look at for the cause of the symptoms?
6. During World War I, physicians noted a phenomenon called "phantom pains". Soldiers with amputated limbs complained of pain or itching in the missing limb. Use your knowledge of sensory nerves and the central nervous system to explain this phenomenon.
7.
a) Describe the physiological homeostatic adjustments for a person who is performing rigorous exercise. As a result of this physical activity their internal body temperature is increasing and their bodies water content is decreasing.
b) Explain how an adjustment to high internal temperature is related to water content. Hint: What is causing this person to lose water content?
c) During this activity how much urine production will this person have? Explain.
d) Regaring any urine thatis formed by this individual during the exercise, will it have a higher solute concentraton, a lower concentration or the same concentration as urine when the person is not physically active? Explain.
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