Answer: The correct answer is : Parasitism arises several million years ago. The evidence shows that the parasites were initially free-living organisms that had contact with their host and managed to adapt to the same biochemical and biophysical environment. There are three theories about the origin of parasitism and they are:
inoculation of the agent through arthropod vectors
ingestion of the "pre-parasite" by its host
active invasion by the same parasites
You may think that there was a nutritional dependence
Answer:
yes
Explain:
short-term stress and chronic-stress are two very different things. short-term stress is known to have a positive effect on your immune system whereas chronic-stress is known to hurt your immune system making you more prone to illness.
*grammar, capitalization, spelling
Answer:
The baby starts breathing
Explanation:
While in the womb, a fetus has its oxygen delivered to it, and the waste products removed (all via the mother's bloodstream), so there is no reason to separate all the chambers of the heart while still in the womb.
However, once the baby is born and it is breathing, the chambers need to differentiate in order to allow the blood to reach the lungs, and the oxygenated blood and deoxygenated blood do not mix.
Answer:
Primary studies.
Explanation:
The study approach which gives the researcher control over items like selection of a source population, and the content and wording of a questionnaire is known as primary studies.
A primary study is a research methodology that is typically focused on having the researcher collect data directly rather than being dependent on a research that was conducted earlier or previously.
This ultimately implies that, a primary study avails a researcher the opportunity to own and have dominion or control over the entire research process.
For the patient with head injury and increased Intracranial Pressure (ICP), an osmotic diuretic, such as mannitol, is very helpful. An osmotic diuretic works by creating an osmotic gradient in the blood by the presence of the additional osmolyte (mannitol). In other words, the osmolyte stays in the bloodstream and creates a greater osmotic force to pull water out of tissues and third spaces (interstitium of cerebrum). This aids in alleviating the addition ICP by fluid removal.
The extra fluid that was "sucked" into the bloodstream via osmosis, can then travel to the kidneys and be filtered out into the urine (diuresis). This explains its two purposes as an "osmotic" and a "diuretic."
