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1. Explain, briefly, why the 10-fold difference in concentration of Na+ across the membrane is important to excitable membranes.
2. How do voltage-gated calcium channels relate to electrical activity of the neuronal vs. sarcolemmal membrane? Concentrate on the differences. Keep your answer brief (3-4 sentences).
3. Why are muscle action potentials only the result of excitation? Think about what hyperpolarization would do for contraction.
A patient requires 50 mg of active drug. Given inpill form, all of the drug is absorbed by the gut into the bloodstream. If the active form is the protonated form, and the drug hasa pKaof6.8, how many milligrams must be given to ensure the properdosa..
In what way are most segment polarity genes different from other genes in the genetic cascade? (other genes: maternal effect genes,gap genes, pair rule genes, homeobox genes)
Research global warming on Web and write the final report outlining the path for the U.S. to follow to address the issue of global warming. Include at least three proposals for the US to follow, plus use a minimum of three different websites or books..
consider the process by which scientists think through information and solve problems and how this is similar and
explain the advantage and disadvantage of random addition or deletion of nucleotides at VDJ junctions during re-arrangement of immunoglobulin gene segments.
q1. what is the dissimilarity between exergonic and endergonic reactions? give an instance of each. what is the
A 26.0mL sample of phosphoric acid (H3PO4) is neutralized by 32.7mL of 2.46M NaOH. A) Balance the equation: NaOH + H3PO4 ? Na3PO4 + H2O B) What is the molarity of the H3PO4 solution?
How is excretion handled by the different invertebratephyla? Why does photosynthesis produce O2 waste?
What is the difference between the rough and smooth endoplasmic reticulum?
Suppose that you have engineered a set of genes, each encoiding a protein that altered signal sequence. If the genes were expressed in a cell.
Explain two sensory changes that coincide with the emergence of diurnality among primates. Discuss specific brain regions or sensory organs if applicable.
Compared to the nucleolus how much genetic information is contained within Mitochondria of human cells?
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