Answer:
In the presence of lidocaine, the action potential was NOT affected at R1 because lidocaine was applied downstream of R1
Explanation:
Lidocaine is an anesthetic that has the power to neutralize neuromal membranes. This anesthetic power allows the ionic fluxes capable of stimulating impulses to be diffused and this allows a dormancy to be achieved. However, when lidocaine is applied downstream to a molecule or structure, the action potential of that structure or molecule is not affected and it may continue to receive impulses.
Lidocaine does not affect the generation of action potentials because it blocks voltage-gated sodium channels.
In the context of neural signaling, lidocaine often functions as a local anesthetic by inhibiting voltage-gated sodium channels, which are necessary for the propagation of action potentials. If the action potential at R1 was not affected in the presence of lidocaine, it could be due to several reasons. One possibility is that lidocaine was applied upstream or downstream of R1, which would not directly impact the action potential at R1. Another possibility is that there are no voltage-gated sodium channels at R1 to be affected by lidocaine.
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the answer is Eukaryotes
Answer:
Bacteria with antibiotic resistance gene/s are favored by natural selection.
Explanation:
The presence of one or more antibiotic resistance genes in the bacteria becomes an adaptive trait in the presence of antibiotics in the surroundings. These bacteria have higher chances of survival and reproduce more to produce more progeny as compared to the bacteria that lack any antibiotic resistance gene. Therefore, the frequency of antibiotic-resistant genes in the population increases over the generations. Here, the increased fitness of bacteria having antibiotic resistance gene/s in the presence of antibiotics represents a natural selection.
The body increases blood flow when it is exposed to the weakened or dead form of a pathogen.
The body raises its temperature when it is exposed to the weakened or dead form of a pathogen.
The body produces antibodies when it is exposed to the weakened or dead form of a pathogen.
Correct answer: D). The body produces antibodies when it is exposed to the weakened or dead form of a pathogen.
The vaccine consists of a weakened or dead pathogen, in response to that body produces antibodies after the administration of the first dose of vaccine. So, if the same body is exposed to that pathogen in the future the body will memorize it, and attack the pathogen more powerfully because it has already prepared an antibody against that pathogen in order to kill that foreign antigen.
Hence, the correct answer would be option D.
What is likely to happen to a healthy population that is experiencing exponential growth is as a result of competition for limited resources, the population would quickly reach its carrying capacity and collapse. This is further explained below.
Generally, population is simply defined as the people who live anywhere.
In conclusion, a healthy population undergoing exponential expansion is likely to exhaust its carrying capacity and collapse as a consequence of competition for scarce resources.
Read more about the population
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