Arsenic poisoning harms the body by
A) unraveling the DNA double helix.
B) rotting the teeth.
C) forming more sulfur bonds in proteins.
D) interfering with cellular extraction of energy from glucose.
D
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The superior opening of the larynx is called the ________.
Fill in the blank(s) with the appropriate word(s).
A tissue sliced on an angle to be made into a histology slide is said to be an oblique section.
Answer the following statement true (T) or false (F)
Which does not drain into the first part of the duodenum?
A. spleen B. pancreas C. common bile duct D. They all drain at this site.
Draw graphs showing the effect on action potentials in a cell following effective doses of each of the listed neurotoxins. Assume that the cell is normally brought to threshold by an electrical stimulus applied to it, so that any abnormality is due to the toxin. Precise values for voltage and duration are not important, just a general trend in how the action potential may be different from normal.
1. puffer fish poison (blocks voltage -gated sodium channel activation) 2. tetraethylammonium (blocks voltage -gated potassium channels) 3. ouabain (blocks sodium-potassium pumps) 4. sea anemone toxin (blocks voltage -gated sodium channel inactivation)