Which structures create the blood brain barrier (BBB)?
A. Gap junctions between ependymal cells and endothelial cells that form the capillary walls
B. Tight junctions between endothelial cells that form the capillary walls
C. Gap and tight junctions between astrocytes and endothelial cells that form the capillary walls
D. Gap junctions between endothelial cells that form the capillary walls
E. Desmosomes and tight junctions between astrocytes and ependymal cells that form the capillary walls
Answer: B
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The building blocks of proteins are ________
A) Oleic acids B) Lewis acids C) Amino acids D) Nucleic acids
Assume that the import of a particular amino acid across the plasma membrane is observed (1 ) to occur only down its concentration gradient and (2 ) to slow when a different but similar amino acid is added to the extracellular fluid. The movement of the amino acid through the membrane is most likely by
A) osmosis. B) diffusion. C) facilitated diffusion. D) active transport. E) pinocytosis.
Which of the following is not correct pertaining to olfaction?
A) The central processes of the olfactory receptor neurons pass through foramina in the cribriform plate. B) The central processes of the right and left olfactory receptor neurons each collectively form the right and left olfactory nerve. C) The olfactory nerves terminate in the olfactory bulb, which is in contact with the orbital surface of the frontal lobe of the brain. D) The axons of secondary olfactory neurons form the olfactory tract. E) The olfactory tract terminates in the medulla.
Pain is the fifth vital sign.
Answer the following statement true (T) or false (F)