Biology, 18.04.2020 01:28 mirandac6775

Let's say we have finally discovered life on Venus. Scientists are investigating a newly discovered life form: a single-celled organism found in the swampy canals. You have been contracted to perform an electrophysiology study. Using intracellular electrodes to measure the electrical charge inside the cell, you find it has a resting membrane potential of -45 mV when the outside fluid is set to 0 mV. Additionally, you have determined ion concentrations and listed them below.

Ion Cell [ ] in mOsm/L Swamp [ ] in mOsm/L
K+ 5 150
Na+ 15 175
Cl- 40 40

You have used new molecular biology techniques to insert protein channels into the cell membrane that allow only and to pass.

a. Predict which ion(s) will move.
b. Tell what direction it (they) will move and what force(s) is/are acting on it (them).
c. Calculate the equilibrium potential for K+, Na+, Cl-
d. Is the equilibrium potential for the same as the membrane potential? Why or why not?
e. What is the resting membrane potential of the single celled organism with these ionic conditions?

Answers: 1

Show answers

Another question on Biology

Biology, 21.06.2019 14:00

A3-year-old child with nephrotic syndrome has been receiving prednisone for 1 week. the nurse reviews the child's progress record and determines that the medication has been effective. what information supports this conclusion? select all that apply.

Answers: 3

Answer

Biology, 22.06.2019 02:00

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

Answers: 3

Answer

Biology, 22.06.2019 02:50

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Answers: 1

Answer

Biology, 22.06.2019 05:20

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Answers: 3

Answer

You know the right answer?

Let's say we have finally discovered life on Venus. Scientists are investigating a newly discovered...

Questions