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A normal subject is breathing room air and expiring into a large collection bag. When the expired air is analyzed, the mean expired PECO2 is measured at 30 mm Hg. When the arterial blood is sampled, PaCO2 is measured at 50 mm Hg. The subject's respiratory frequency is 15 breaths per minute and her average tidal volume is 500 ml. 1. Calculate the physiological dead space fraction. 2. Calculate the alveolar ventilation. 3. Calculate the CO2 production rate.
If the preclinical prevalence of breast cancer increased in the screened population would you expect the positive predictive value to increase, decrease or remain unaltered? Why?
Motor proteins use the energy in ATP to transport organelles, rearrange elemts of cytoskeleton during cell migration, and move chromosomes during cell division. Which of the following mechanisms is sufficient to ensure the unidirectional movement ..
What is an appropriate discussion topic that reinforces the lab topic, Taxonomy.
From a bacteria stock you serially dilute 1/100 two times, then serially dilute 1/10 two times. From this last tube you plate 100 ul, which produces 156 colonies the other day.
Using information provided, what is the hydrogen/helium content inside a star that is the approximate age of our sun. what aspects are consequences of the evolutionary history of animals you are considering.
You carry out an experiment using the FRAP technique to determine the relative speed of diffusion of two proteins, A and B. Protein A has a molecular weight of 175,000 daltons and B a molecular weight of 35,000 daltons. Which protein results in th..
The sequence of the cloned DNA and the amino acids encoded by open reading frames. Stop codons are underlined and labelled 2 or 3 to indicate their reading frame.
Describe the etiology and genetics of the disease phenylketonuria (PKU). Phenylketonuria (PKU) refers to a disease found in the humans in which the affected individual does not have enzyme phenylalanine hydroxylase.
Two NotI restriction enzymes cleave DNA on opposite sides of the Dbm gene in a species of yeast. A molecular probe for Dbm detects a DNA restriction fragment of 8.5 kb in organisms that are wild type at Dbm.
Imagine this situation: Species #1 and Species #2 are unrelated, but each produces an enzyme capable of hydrolyzing soybean oil. How can this be reconciled with the fact that enzymes are highly specific to their substrates?
The coefficient for selection between Zid+ and Zid- in common garden experiment of an individual being treated with AZT is 0.036, indicating selection for Zid-.
Draw a diagram that represents the molecular structure of a phospholipid. Be sure to show any part of the molecule that might be charged. Describe 2 ways in which the molecular structures of phospholipids and triglycerides are similar, and two ways ..
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