1) a) The lethal dose (LDso) for caffeine is 200 mg/kg and each cup of coffee contains 90 mg…

1) a) The lethal dose (LDso) for caffeine is 200 mg/kg and each cup of coffee contains 90 mg…

1) a) The lethal dose (LDso) for caffeine is 200 mg/kg and each cup of coffee contains 90 mg caffeine. How many cups of coffee should a person of 80 kg should drink at once to reach the lethal dose? b) If the person were to drink one cup of coffee per day for this number of days (calculated in a)), would s/he be likely to die from an overdose of caffeine? c) If the person could drink exactly the number of cups of coffee you calculated in 1) a) all at o sitting, would the person be guranteed to die? Why or why not? 2) 40 rats each weighing 0.5 kg were used in a lethal dose experiment. The number of death rats versus the mass of substance A given to each rat presented in the Figure below.Calculate the lethal dose of substance A. 40 35 30 25 20 15 10 5 0 0 20 40 60 80 100 Weight of Substance A given to each rat 3) After a person is exposed to a toxic substance what happens to the toxic substance in the bod 4) Table below shows the dose-response relationship of a toxic substance. What type of dose- response graph is that? Is there a threshold level for the substance? Dose (mg) 0 1 2 The number of people affected 0 2 4 6 8 10 3 4 5 5) What is the difference between epidemic, endemic and pandemic? 6) Based on the information given in the figure, a) What is the incident rate in the first 3 years? 35 30 No of people 20 10 5 0 1 2 3 years (Time exposed) (The number of years survived) 5 6 b) What is the risk in 6 years based on the population in the beginning (at year =0)? 7) A study starts with 3000 people. Of these, 200 have lung cancer at the beginning of the study. What is the prevalence of the cancer per 1000 people at the beginning of the study? 8) What are the impacts of climate change on environment and public health?
Apr 06 2022 12:55 PM

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