What would happen to a person who was poisoned with a chemical that blocks the production of neurotransmitters at neuromuscular junctions?
A) The muscles would be unable to contract.
B) The person's muscles would contract uncontrollably.
C) The sarcoplasmic reticulum would release sodium ions instead of calcium ions.
D) The muscles would swell.
A
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The entrance into the cavity formed during gastrulation in sea stars and frogs is called the
(a) archenteron. (b) blastocoel. (c) blastocyst. (d) blastopore.
You a given a plant tissue in the lab and asked to determine if the tissue is a source or a sink. Microscopic analysis reveals an abundance of colorless parenchyma cells with plastids. Only one biochemical test reacts positively with your sample. In the presence of iodine, the plastids turn a dark purplish color. Based on this information, you determine your sample is
A. a source because your sample contains plastids. B. a source because your sample is rich in carbohydrates. C. both a source and sink because it contains both plastids and carbohydrates. D. a sink because your sample is rich in carbohydrates.
ATP is a portable form of energy "currency" inside cells.
a. true b. false
After James Gusella's first attempt to link the RFLP marker to HD failed, he used a new RFLP marker on ________ to determine if there was linkage of disease phenotype to the new G8 marker
A) the same population of HD patients as his first experiment B) a small Venezuelan population that has HD C) a specific subset of an American HD family D) a large Venezuelan population that has HD