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You are part of a team that retrieves a deep-sea worm from the depths of the Mariana Trench. You suspect that Mg2+ takes the function of Ca2+ in transmitter release. List 3 ways you could test that this hypothesis.

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Related questions

I need help answering this question:

Observation: A strange deep sea creature has been discovered. You are recording from a neuron in it’s brain with an electrode. Upon electrical stimulation, you observe change in voltage that resembles an action potential: the voltage rises, shoots up when it crosses a threshold, and then rapidly falls back to resting potential. Looking at the ions inside and outside the cell, you find that there is a high concentration of positively charged Lithium ions outside the cell and low concentration inside the cell. There is also a high concentration of potassium ions inside and low outside. Finally, there is an equal amount of Chloride ions on both sides. Strangely enough, there aren’t any Sodium ions around.

Based on these observations, you ask “If there is no sodium, what ion is mediating the ‘action potential’?”

In 100 words or less: 1. Formulate a hypothesis as to what ion might be mediating the action potential.2. Design an experiment to test your hypothesis. 3. State what outcome would confirm your hypothesis.

In deep sea vents, you find a new species of worm that has a hemoglobin-like molecule with several important changes. They are: 1) There are no histidines in the molecule; all seemingly have been replaced by cysteine, and 2) instead of being a tetramer, this hemoglobin is a heptamer. From these data, please answer the following two questions.4

29) Which of the following statements about the oxygen saturation of this new hemoglobin is true?

A) The saturation curve will be steeper than human hemoglobin

B) The saturation curve will not be as steep as human hemoglobin

C) The saturation curve should look like human hemoglobin

D) The saturation curve should look like human myoglobin

30) You find the Bohr effect still applies to this new hemoglobin. Which of the following is most likely the internal pH of these worms?

A) 3.5

B) 6.0

C) 8.5

D) All of these answers are reasonable

E) This scenario contains no information for me to even make a stab at answering this ludicrous question

The massive Deep Horizon oil spill of 2010 released enough crudeoil into the Gulf of Mexico to fill an entire swimming pool about 7thousand times.

How do we know the damage possibly caused by such a disaster? Wecould always plan an experiment..... If you worked for the Dept. ofFish and Game in the Gulf States, maybe you would...

You could take a part of the sea floor very nearby the site of thespill, say an area exactly 100 square meters, and count the numberof different species that you find. This would be a measure of"Biodiversity", which is generally a good indicator of ecosystemhealth - in general, the more Biodiversity, the healthier theecosystem.

Then you could sample an area of the seafloor exactly the samesize, but further away (say 1 km) from the spill site, and countthe number of species in that site. And then continue sampling thesame size area at 1 km intervals, until you reach an area manykilometers away from the spill site where you know the area wasrelatively undisturbed by the spill.

If you run this experiment,

1) What is the independent variable?
2) What is the dependent variable?
3) What is one very obvious control variable?
4) Why would you want to sample for biodiversity in each of thesites at the same time of day?

And....
5) What is a valid hypothesis that you could have for thisexperiment?

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