A particular hormone travels by many types of cells in the body. Which mechanism ensures that it acts only on the target cells?

Answers

Answer 1

Answer: The mechanism that ensures that it acts only on target cells is that each target cell has a particular receptor for that particular hormone. This makes it impossible for other cells to work with the hormone. This is the reason that different hormones are accepted by different cells very easily. I hope this answer helps you.

Answer 2

Answer:

Final answer:

Hormones act only on their target cells because of the mechanism of receptor specificity, where the hormones and cells interact like keys and locks.

Explanation:

The mechanism that ensures a hormone acts only on its target cells is based on the concept of receptor specificity. In biology, hormones are like keys, and the cells they affect are like locks; each hormone (key) fits only a specific type of receptor on certain cells (locks). If a cell does not have the appropriate receptor for a particular hormone, then it will not be affected by that hormone. This is why a hormone can travel throughout the body, yet only exert its effects on certain cells.

Learn more about hormone receptor specificity here:

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Identify the values of x and y that would make the following expression represent a real number.(4 + 5i)(x + yi)

A. x = 4, y = 5
B. x = –4, y = 0
C. x = 4, y = –5
D. x = 0, y = 5

Answers

I think the correct answer from the choices listed above is option C. The values of x and y that would make the expression to represent a real number would be that x = 4, y = –5. Substituting and simplifying,

(4 + 5i)(4 - 5i)
16 - 20i + 20i - 25i²
16 - 25(-1)
16 +25
41

x = 4, y = -5

Further explanation

This is a problem with complex numbers.

A complex number is a number of the form $\boxed{ \ z = x + yi \ }$ where x and y are both real numbers.

x is considered the real part of the complex number.
y is considered the imaginary part of the complex number.
The real part of a complex number $\boxed{ \ z = x + yi \ }$ is denoted by $\boxed{ \ Re(z) \ }.$
The imaginary part of a complex number is denoted by $\boxed{ \ Im(z) \ }.$

The modulus of a complex number $\boxed{ \ z = x + yi \ }$ is denoted by $\boxed{ \ |z| \ }$ and defined to be $\boxed{ \ |z| = √(x^2 + y^2) \ }$
Remember this $\boxed{ \ i^2 = (√(-1))^2 = -1 \ }$

For example, $\boxed{ \ z = 3 - 4i \ }$

Re(z) = 3
Im(z) = -4
The modulus $\boxed{ \ |z| = √(3^2 + (-4)^2) = 5 \ }$

Let's look at the key problem.

We must identify the values of x and y that would make the following expression represent a real number.

$\boxed{ \ = (4 + 5i)(x + yi) \ }$

$\boxed{ \ = 4(x + yi) + 5i(x + yi) \ }$

$\boxed{ \ = 4x + 4yi + 5xi + 5yi^2 \ }$

$\boxed{ \ = 4x + 4yi + 5xi - 5y \ }$

At this point, 4yi and 5xi must be of equal value and marked opposite, so that the expression represents real numbers.

$\boxed{ \ 4y = - 5x \ }$

Become a fraction, i.e.,

$\boxed{ \ (x)/(y) = (-4)/(5) \ or (x)/(y) = (4)/(-5) \ }$

From the options, the answer is C.

$\boxed{ \ x = 4, y = -5 \ }$

- - - - - - -

Let's check back to expression.

$\boxed{ \ = (4 + 5i)(x + yi) \ }$

$\boxed{ \ = 4x + 4yi + 5xi - 5y \ }$

x = 4 dan y = - 5 ⇒ $\boxed{ \ = 4(4) + 4(-5)i + 5(4)i - 5(-5) \ }$

$\boxed{ \ = 16 + -20i + 20i + 25 \ }$

$\boxed{ \ = 16 + 25 \ }$

Thus the expression represent a real number of 41.

Learn more

The midpoint brainly.com/question/3269852
The piecewise-defined functions brainly.com/question/9590016
The composite function brainly.com/question/1691598

Keywords: identify, the values of x and y, the following expression, represent a real number, (4 + 5i)(x + yi), a complex number, real, imaginary

The energy for life is: A. hydrothermal vents B. geothermal energy C. is recyclable D. is only initially captured by plants and other photosynthetic organisms; the rest of life depends on the energy the photosynthesizers captured for their energy.

Answers

Answer: A

Explanation:

Developed over 100 years ago, Koch's postulates is no longer used to determine etiologic agents of human infectious diseases. True False

Answers

Answer:

True

Explanation:

Koch's postulates was proposed to show a causative relationship between a microbe and a disease.

Koch's postulates

•The microorganism must be present in large quantity in all organisms affected by the disease, but should not be seen in healthy organisms.

Koch abandoned this due to his discovery of asymptomatic carriers of cholera and of typhoid fever. Asymptomatic or subclinical infection carriers are seen in diseases, especially viral diseases.

•The microorganism must be seperated from a diseased organism and nutured in pure culture.

This can suspended for specific microorganisms or entities which(at the current time) can't be nutured in pure culture. Viruses uses host cells to grow and replicates and not in pure culture.

•The cultured microorganism should lead to disease when it infects a healthy organism.

It says "should", not "must".

NOTE: NOT ALL organisms introduced to an infectious agent will be infected which may be due to certain factors like general health and good immune functioning; vaccination; or genetic immunity. Its best explained using the resistance to malaria as a result of presence of at least one sickle cell allele.

•The microorganism must be reisolated from the inoculated, diseased experimental host and observed as being identical to the basic specific causative agent.

A single pathogen may lead to several disease conditions. A singualr disease infection may be due to several different microorganisms. While some pathogens cannot be cultured in a pure culture in the lab, others can infects humans.

Which area of the brain is the slowest to develop?

Answers

Answer:

The prefrontal cortex

Explanation:

The prefrontal cortex, which is responsible for higher-order cognitive functions such as decision-making, planning, impulse control, and reasoning, is generally the slowest area of the brain to develop. Its development continues into early adulthood, with significant changes occurring throughout adolescence. This delayed development of the prefrontal cortex is often associated with the development of executive functions and the ability to make complex decisions, which is why teenagers and young adults may sometimes exhibit impulsive behavior or have difficulty with long-term planning.

If the earth's differentiation were any different, it may have affected its gravitational pull and . Both of these factors were essential to creating our atmosphere.

Answers

If the Earth's differentiation were any different, it may have affected its gravitational pull and tectonic activity. First, it must be clarified that differentiation refers to the geological process that resulted in the Earth's interior structure. This means that tectonic activity such as volcanic activity are also essential to creating our atmosphere by participating in the various atmospheric cycles.

Ben shared his post with 2 friends. Each of those friends shares with 3 more every day, so the number of shares triples every day.Day Number of Shares
0 2
1 6
2 18

Write an exponential function to represent the spread of Ben's social media post.

Answers

From the data given above, we can make the following:
N(0) = 2 x 3^0 = 2
N(1) = 2 x 3^1 = 6
N(2) = 2 x 3^2 = 18

An exponential function is represented by:

y = ab^x

where a is the initial value and b is the growth rate.

The exponential function for this case would be:

y = 2(3)^x
y = 6^x

Answer: $y=2(3)^x$