To process information, postsynaptic neurons often add up simultaneous signals from several presynaptic neurons. Which structure and process allow them to do so? A. axons; temporal summation
A. axons; temporal summation
B. axons; spatial summation
C. dendrites; temporal summation
D. dendrites; spatial summation
D. dendrites; spatial summation
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You arrive late to a biological seminar. However, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. Immediately, you know that they are talking about a:
A. carbohydrate. B. protein. C. DNA. D. lipid.
Morbid obesity is defined as having a BMI (body mass index) of at least
A. 10–15. B. 40. C. 20. D. 25. E. 30.
Which of the following is not one of the effects of angiotensin II?
1.Constriction of arterioles to raise blood pressure quickly 2.Increased secretion of sodium ions into the distal convoluted tubule of the nephron 3.Increased thirst so that more water is brought into the body 4.Secretion of the hormone aldosterone from the adrenal cortex
Which of the following statements about siderophores is FALSE?
A) Siderophores are considered as bacterial virulence factors. B) Siderophores increase permeability of the outer membrane for G- bacteria. C) Siderophores bind iron and transport it into the bacteria. D) Siderophores compete for iron from host proteins transferrin and lactoferrin. E) none of the above.