Which statement is accurate?
A. Human cells contain 46 genes; another name for a gene is a nucleosome.
B. DNA is made up entirely of genes; a chromosome is the unwoven form of chromatin.
C. A sequence of nucleotides in DNA constitutes a gene; DNA and associated proteins form chromatin.
D. Each nucleotide in a gene is bound by hydrogen to the next nucleotide in the sequence; chromatin is a nitrogenous base.
Answer: C
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An inhibitory postsynaptic potential (IPSP) is associated with ________
A) lowering the threshold for an action potential to occur B) a change in sodium ion permeability C) hyperpolarization D) opening of voltage-regulated channels
A patient has edema in the legs after prolonged standing. This edema is most likely caused by:
a. Closed lymphatic channels b. Decreased capillary permeability c. Decreased oncotic pressure d. Increased capillary hydrostatic pressure
When carbon dioxide bonds to hemoglobin, the compound ______ forms
Fill in the blank(s) with correct word
To accommodate for their high surface to volume ratio, smaller mammals
a. reduce the size of each alveolus. b. increase alveolar density. c. increase the density of capillaries used in gas exchange. d. reduce the size of each alveolus and increase alveolar density. e. all of these.