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A neuron in a mouse's brain (neuron A) continuously generates action potentials (APs) at a constant rate of 50 action potential per second (50 Hertz (Hz)). Neuron A receives presynaptic input from three other neurons, B, C, and D. Neuron B's axon tip forms a synapse on neuron A's axon near A's cell body. When neuron B is active, its action potentials transmit EPSPs (excitatory post-synaptic potentials) to neuron A at a rate of 500Hz. When B is active, neuron A increases its AP-firing rate from 50Hz to 100Hz. Neuron C forms a synapse on A very close to neuron B's synapse and, when C is active (and B is inactive), A receives EPSPs at a rate of 50Hz but the rate at which A generates APs remains unchanged by neuron C, it stays at 50Hz. Neuron D's synapse on A is located on one of A's dendrites. When neuron D is active it causes neuron A to receive EPSPs at 500 Hz but the output of neuron A does not change, it stays at 50Hz. The EPSPs in each of the three situations are the same magnitude, 5 millivolts (5mV). Explain how neurons B, C, and D affect neuron A differently.
The tRNA in the E site will leave and migrate to its aminoacyl-tRNA synthetase d. where the tRNA will be recharged with the correct amino acid.
How may someone become hyponatremic in a country where the salt content of food is generally very high. What about the function.
Discuss how would the pH and dissolved oxygen change over the course of a day (morning, noon, and night)? Over the course of a year? What is driving these changes?
In our population there are 300 red sea stars, 200 pink sea stars and 500 White Sea stars. How numerous total alleles for sea star colour are in this population.
Was the hypothesis supported and What is your conclusion
Prepare an essay on nosocomial infection.
what are the potential benefits and the overall risks of genetic engineering? please explain and give exmaples.
Think about a cross between a male who has vitamin D resistant rickets and a female who has fully functional PHEX protein and does not express vitamin D resistant rickets.
Explain the nonspecific antimicrobial effects of mucus, lysozyme, and low pH. For each of these substances, list where they are found in the body and how they function in fighting pathogens.
What is the difference between heterosporous and homosporous plants? What two types of spores do heterosporous plants produce? Spores that will develop into a female gametophyte are.
Think about the nature of negative-feedback control and the function of the respiratory system, what effect do you predict that a decrease in CO2 in the internal environment would have on how rapidly and deeply a person breathes?
A student performed a BioRad miniprep of plasmid DNA that resulted in 100ul(microliter) of DNA solution. To determine the concentration of this solution, 20ul of the DNA solution was placed in 480ul of water and the absorbance of the diluted sampl..
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