Explain how a polar molecule, such as water, can have a difference in electrical charge but is also electrically neutral
What will be an ideal response?
Because the electronegativity of oxygen and hydrogen is so different, oxygen keeps shared electrons more around its nucleus than does the hydrogen in water, creating an electrical imbalance. Because each atom of the water molecule at some time has its outermost energy level full, the water molecule is electrically neutral.
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With an intact NMDA receptor, predict the effect if the flow of calcium were blocked
a. Long-term potentiation would occur, but short-term memory would not be converted to long-term memory. b. Phosphate groups would not be attached to CaMKII. c. The hippocampus would be responsible for long-term potentiation. d. CaMKII would not be responsive to phosphate. e. Calcium groups would not be attached to CaMKII.
The presence of a mutualist might allow what to happen in terms of population dynamics?
A) The species could surpass its carrying capacity. B) The growth rate would decrease. C) The competition coefficient would become negative. D) N would go to 0.
Refer to Figure 47-1. Nerves would be located in the part labeled as number:
a. 2 only
b. 3 only
c. 4 only
d. 2 and 3
e. 3 and 4
The atrioventricular valves are closed when the
A) right atrium is contracting. B) P wave of an electrocardiogram appears. C) heart is completely relaxed. D) ventricles contract. E) ventricles are relaxed.