When a neuron is at its "resting potential," which of the following is true about the concentration of sodium ions?
A) Sodium ions have a greater concentration outside the neuron's cell membrane.
B) The sodium concentration is the same outside and inside the neuron's cell membrane.
C) Sodium ions have a greater concentration inside the neuron's cell membrane.
Answer: A
You might also like to view...
How do phosphates from the oceans reach rivers and lakes?
a. Phosphates dissolved in evaporated sea water precipitate over lakes and rivers. b. Phosphates form sedimentary rocks that are then uplifted by tectonic activity. c. Phosphates from animal bones collect in rivers and lakes where they slowly dissolve. d. Phosphate-rich sediment from the ocean floor is carried inland by hurricanes and tropical storms.
A molecular analysis of plasma or nuclear membranes would reveal the presence of _____
a. cellulose and chitin b. suberin and cutin c. phospholipids and proteins d. microtubules and microfilaments e. phospholipids and nucleic acids
Radially symmetrical animals have a nerve __________. Fill in the blank(s) with the appropriate word(s)
If nondisjunction occurs during meiosis II (to one of the cells resulting from meiosis I), how many of the final four products will be abnormal?
A. none B. three C. two D. four E. one