Who is credited with developing and documenting the first vaccination procedure against smallpox?
A. Pasteur
B. Koch
C. Lister
D. Jenner
Answer: D
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Increases in poly(A) tail length result in increased ____
a. transcription b. translation c. protein stability d. mRNA degradation e. alternative splicing
Fruit often has fleshy tissues that develop from the:
a. endosperm b. ovule c. seed coat d. cotyledon e. ovary wall
An inhibitory post-synaptic impulse (IPSP):
a. is represented by a movement of the neuron to a more positive voltage. b. moves the neuron further away from firing. c. involves the action of acetylcholine. d. occurs when Na+ ion channels open. e. occurs when K+ ion channels close
In 1822, the Canadian fur trader Alexis St. Martin was accidentally shot with a musket. The shot entered his left chest, fractured a rib, damaged the lungs, lacerated the diaphragm, perforated the stomach, and finally exited his body. Amazingly he survived, but the hole in his belly never completely healed. This allowed Dr. William Beaumont direct access to his stomach for experiments, and led to his discovery of the importance of stomach acid in digestion. Which body cavities did the musket shot pass through?
A. The shot entered the dorsal cavity and exited through the ventral cavity. B. The shot entered the pericardial cavity and exited through the pleural cavity. C. The shot entered the thoracic cavity and exited through the pleural cavity. D. The shot entered the thoracic cavity and exited through the abdominopelvic cavity.