Which of the following is a type of blood cell that undergoes degranulation in type I hypersensitivity reactions?
A. B cell
B. basophil
C. T cell
D. macrophage
E. plasma cell
Answer: B
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Macromolecules can be assembled into ________ that are components of organelles and other subcellular organelles.
Fill in the blank(s) with the appropriate word(s).
What do the two sets of neurons damaged in Charcot-Marie-Tooth neuropathy comprise?
Charcot-Marie-Tooth is the most commonly inherited peripheral neuropathy, and has no known cure. Patients suffer damage to motor and sensory neurons, leading to degeneration of muscles and gradual loss of motor control. A. peripheral nervous system B. autonomic nervous system C. somatic nervous system D. parasympathetic nervous system E. central nervous system
Where is the sinoatrial node located?
a. left atrium b. left ventricle c. pulmonary artery d. right atrium e. right ventricle
The nodes on a cladogram represent
a. periods of extinction. b. derived characters. c. clades. d. common ancestors. e. exaptations