Becuase they were fully aquatic unlike tetrapods today
Artificial reproductive technologies can be used to solve fecundation problems and also health problems occurred during the gestational process.
<h3>What are artificial reproductive technologies?</h3>
Artificial reproductive technologies are any type of medical technology aimed at providing solutions to gestation when there are problems associated with this biological process.
Artificial reproductive technologies include, among other techniques, in-vitro fecundation, zygote intrafallopian transference, frozen embryo transference, etc.
In conclusion, Artificial reproductive technologies can be used to solve fecundation problems and also health problems occurred during the gestational process.
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The diagnosis we can make according, to this information, is a migraine with aura.
- A migraine is a chronic headache, most likely genetic. It is often a disturbing disease because of the frequency, duration and intensity of crises, with repercussions on daily life, work or school.
A migraine with aura (a classic migraine, Unlike a commune migraine without aura): There's a recurrent headaches, typically preceded by neurological manifestations (like a light sensitivity), reflecting a localized, transient brain dysfunction.
The cause can be the abuse of drugs, according to the fact that she takes over-the-counter drugs. It can also be anxiety or depression or even due to genetic factors.
Answer:
The charges inside and outside of the neuron before receiving a stimulus are negative and positive, respectively, which corresponds to the transmembrane rest potential.
Explanation:
Neuron is the specialized cell of the nervous system in charge of transmitting electrical impulses. The generation of a nerve impulse in the form of an electric current is due to a change in the transmembrane potential.
<u>Outside the neuron cell, electrical charges are predominantly positive, and the ion with the highest concentration is sodium. In the intracellular space, a great quantity of proteins provide negative charge, and there is a predominance of potassium ions</u>. Under these conditions, the ionic channels are closed.
For this reason, a neuron at rest, before receiving a stimulus, presents positive charges on the outside and negative charges on the inside, and the membrane potential in this condition is estimated at a value of -65 mV.
Once a stimulus is produced, the ionic channels open and Na+ ions enter the cytoplasm, exchanging them for K+, which implies a change in the membrane potential which, on reaching the threshold, produces an action potential and the nerve impulse is produced.
The answer is Bacteria
Prokaryotes are a microscopic single Celled organisms that has neither a distinct nucleus with a membrane nor other specialized organelles.
