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Makovka662 [10]
3 years ago
15

As a state epidemiologist, you are called upon to determine whether a recent oil spill in a water reservoir has caused an unusua

l type of acute arthritis. Within the county that you work, water is supplied by two independent reservoirs separated by 100 miles. The spill occurred in one of these reservoirs. The records from the Water Department clearly indicate which households receive water from which reservoir. Finally, you develop a case definition and institute a surveillance program to detect cases. To determine an association between the oil spill and arthritis, would you perform a cohort study or case-control study
Medicine
1 answer:
Over [174]3 years ago
5 0

ANSWER: CASE-CONTROL STUDY

EXPLANATION:

An epidemiology expert will make use of a Case-control Study for proper determination of association or linkage between the oil spill and the disease outbreak (arthritis).

Case-control Study provides an observational experiment between two existing groups (two reservoirs) differing in outcome (affected and not affected), they are highlighted and compared on the basis of a context (disease outbreak; arthritis).

However, the known group is regarded as the control group and it provides a substantial guide to the confirm the validity of other experimental groups in relation to the general context (outbreak of arthritis).

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have you ever been refused a u.s. visa, or been refused admission to the united states, or withdrawn your application for admiss
a_sh-v [17]

If you have ever been refused a U.S. visa, been refused admission to the united states, or withdrawn your application for admission at the port of entry, write the specifics of any time you've had a U.S. visa application rejected here.

Even if you have previously had a U.S. visa of some other kind rejected, you must respond "Yes." You have to be honest here (and of course, everywhere in this entire process). Consulates still look at your documents and file. They can also see if you've ever lied, submitted false documentation when applying for a visa, or broken the rules of a visa in the past.

It would be challenging for you to obtain a visa if any of that is accurate. Even if you can now produce the document that caused your visa to be rejected under Section 221(g) because it was lacking, the rejection still counts as a rejection, and you must comply with it.  

Therefore, you must affirmatively answer "yes" to this query and supply all subsequently asked information. A tourist visa or even a student visa has already been refused to many persons. If you apply for an H1 visa, a fiancé K1 visa, etc., this is not a problem.

However, this application may also be rejected if you were rejected due to fraud.

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8 0
1 year ago
Which muscle helps compress the abdominal contents during defecation or childbirth?.
Sati [7]

Answer:

I believe the answer is Rectus abdominis

Explanation:

The rectus abdominis muscles are a pair of long muscles that run vertically up the front of the abdomen, stretching from the pubis to the xiphoid process. They compress the viscera and tense the abdominal wall.

4 0
2 years ago
Read 2 more answers
Oogonia multiply until the fifth month. within six months after birth, each will transform into a:_____.
kvv77 [185]

Oogonia multiply until the fifth month .within six months after birth ,each will transform into a primary oocyte .

What is oogonia ?

During foetal stag of development the embryo develops the germinal epithelium of ovary .some of the cells of  germinal epithelium enlarge and divide mitotically . the dividing cells projects into the stroma as a cord known as the egg tube of Pflugar;which later becomes a round mass ,called the egg nest .all these dividing cells are  egg mother cells known as Oogonia.this is derived from the endodermal lining of the embryonic yolk sac which comes to lie in the ovary of the female ( while it is still an  embryo ).

What is primary oocyte?

One cell of the egg nest grows but does not divide furter so as to form the primary oocyte.the primary oocyte is diploid and enters the growth phase.it is dormant stage ,nucleus intact ,female is born with these in her ovary.every month primary oocytes resume oogenesis and start developing growth and development in the onset of puberty.

Hence the correct answer is Primary oocyte.

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8 0
2 years ago
There are neurotransmitters that can be both excitatory and inhibitory. Explain how this is possible.
Lady bird [3.3K]

Answer:

The answer to the question: There are neurotransmitters that can be both excitatory and inhibitory. Explain how this is possible, would be, Yes, there are some neurotransmitters such as acetylcholine and dopamine, who have both an excitatory and inhibitory effect in other neurons and in cells, and this happens because of the type of receptors they bind to, and the type of cell where they bind.

Explanation:

Neurotransmitters are the messengers, or communication system that the nervous system in general has with itself and with other systems. There are several types of these, and some work both as neurotransmitters and as hormones as well. How they act, where they act, and what kind of response they elicit, depends entirely on the receptors to which they bind, when they are released by a pre-synaptic neuron. Most neurotransmitters are either excitatory, or inhibitory, and some are known as neuromodulators. However, there are two types known today that work as both excitatory and inhibitory: dopamine and acetylcholine. How can either of these act as each of these? Depends on the receptors present on the post-synaptic neuron, or cell, and depends on the type of cell as well. As soon as these two bind to their appropriate receptors, in a specific kind of cell, they will produce the specific response from the cell, either starting an action potential, ir inhibiting it from happening.

8 0
4 years ago
The capacity of a drug to do damage or cause adverse effects in the body is called?
SIZIF [17.4K]

The capacity of a drug to do damage or cause adverse effects in the body is called toxicity.

In general terms, toxicity can be described as something that is harmful. In medical terms, toxicity can be described as the ability of any chemical or drug to damage the body of a person.

Drugs, of various kinds, can cause serious adverse effects on a person. Even drugs that are used for medical purposes can cause adverse reactions when not used properly, without the prescription of a doctor. Hence, to avoid toxicity by a drug, a person should only take a drug that is prescribed by a doctor. The toxicity of a drug can even lead to lifelong damage or death of a person.

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8 0
2 years ago
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