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1 month ago

Before performing an mri, why must technicians ask patients if they have any steel inside their body?

2 answers:

7 0

Technicians inquire if patients have any steel in their bodies because steel can become magnetized when exposed to a magnetic field. Since MRIs generate a substantial magnetic field during operation, the steel would attract and could potentially cause injury

-BARSIC- [2.5K]1 month ago

3 0

During the course of an MRI scan, strong magnetic fields are employed. Any metallic object present during this scan could become magnetized and be drawn toward the magnet with a force that poses a danger to human skin.

Further Explanation:

The technique that produces detailed images of body tissues and organs without X-rays is known as magnetic resonance imaging or MRI. This method utilizes a magnetic field instead of X-rays to generate radio waves that create high-resolution images. These vivid images can aid in diagnosing injuries within the body's internal structures.

The scanning process is carried out in an MRI machine shaped like a donut. The individual lies on a table facing up and is moved into the machine from one end. When the machine is powered on, it produces a magnetic field that aligns the protons in the body. Consequently, the resulting radio waves cause the protons to emit electric signals, which the machine collects to create a clear representation of the internal organs or tissues.

The powerful magnets that are part of the MRI machine are essential for its function. Because of the intense magnetic fields, it is crucial to exercise caution in the scan room. Prior to the MRI, the technician may inquire if the patient has any metal or steel implanted in their body. This precaution is due to the possibility of the powerful magnetic field magnetizing the metallic object. A substance that can be magnetized is prone to responding to a magnetic field. Thus, anything that could potentially become magnetized must be removed upon entering the scanning area. The magnet could exert such a force on any metallic object that it might break through weak surfaces as it is drawn towards it. If a metallic item is located within the body, the force exerted by the magnetic field could tear through the skin, resulting in injury. For this reason, patients are typically asked about any metallic implants beforehand to prevent these scenarios.

Learn More:

1. Learn more about the treatment of eukaryotic cells with a drug 2. Learn about protein synthesis in cells 3. Learn about gas exchange in blood cells

Answer Details:

Grade: High School

Chapter: Magnetic Resonance Imaging

Subject: Biology

Keywords:

Magnetic Resonance Imaging, MRI, magnetic field, magnetization, protons, radio waves, electric signals, high-quality image, internal organs.

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Imagine that two unlinked autosomal genes with simple dominance code in goats for size, where T is tall and t is short, and for

enyata [2506]

Answer:

(A) 0.0625

(B) 25%

Explanation:

With the following:

T indicates tall

t indicates short

R indicates red

r indicates tan.

When a short tan male goat mates with a tall red female goat of an unknown genotype;

Let's analyze separately;

A short tan male goat = ttrr

The female goat’s genotype is not specified but it is known to be tall and red

∴ We determine that she must be T_ R_;

the potential genotype probability of the female for each allele could be:

- T

or Tt- RR

or R

Nonetheless, from earlier discussion;

the chance that the female is Tt = $\frac{1}{2}$

the probability of the female being Rr = $\frac{1}{2}$

the probability of passing on the recessive allele 't' to offspring = $\frac{1}{2}$

the probability of passing on the recessive allele 'r' to offspring = $\frac{1}{2}$

∴ the likelihood that the pairing would yield short, tan offspring (ttrr) stands at;

= $(\frac{1}{2})^{4}$

= $(\frac{1}{16})$

= 0.0625

(B)

In pea plants, one is homozygous recessive for both traits, leading to the cross of Yy Rr × yy rr. Determine the green and round offspring percentage.

For Color, let:

Y = Yellow

y = Green

For shape, let;

R = Round

r = wrinkled

If a cross occurs between Yy Rr × yy rr. (yellow round and green wrinkled)

the ratio of green and round offspring will be;

If Yy Rr self-crosses; various traits (YR, Yr, yR, yr)

yy rr will produce (yr, yr)

YR Yr yR yr

yr YyRr Yyrr yyRr Yyrr

Yellow Yellow Green Green

Round Wrinkled Round Wrinkled

Thus, the percentage of green and round offspring based on the above is:

$\frac{2}{8}*100%$ =

$\frac{1}{4}*100$ =

25%

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1 month ago

Which table correctly identifies the four most abundant elements in biomolecules

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Answer:

The elements are hydrogen, oxygen, nitrogen, and carbon.

Explanation:

Together, they constitute more than 99% of the mass in most cells and are the lightest elements able to create one, two, three, and four bonds correspondingly.

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3 months ago

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lana [2441]

Answer:

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They are adept at surviving arid climates.

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