Which of the following would best be defined in part as an immune system overreaction?
A) chronic disease
B) allergies
C) cytotoxic T cell action
D) cell-mediated response
E) autoimmune disease
Answer: B
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Which of the following organisms would likely be an r-strategist?
A. humans B. pine trees C. whales D. kangaroos E. owls
During the passage of a nerve impulse,
a. sodium ions pass through gated channels. b. positive feedback causes more sodium ions to enter the cell. c. the interior of the cell becomes positive relative to the outside. d. changing voltage increases the number of open gates. e. all of these occur.
Receptors are membrane-bound proteins typically located on the cell surface that function to bind other molecules based on shape or structure
Indicate whether the statement is true or false
Movement of molecules from an area of high to low concentration with the help of membrane proteins is:
A. simple diffusion B. signal transduction C. facilitated diffusion D. group translocation