which statement regarding normal microbiota of the human respiratory system is false?

Answers

Answer 1

Given what we know about the respiratory system, we can confirm that the statement regarding normal microbiota of the human respiratory system that is false is option B " The upper respiratory tract is mostly sterile".

As far as the human respiratory tract and system, it was previously believed that the upper tract contained bacteria while the lower respiratory tract was sterile. Recently, however, this has been proven to be false. Bacteria are in fact present in the entire respiratory tract even in healthy individuals. For this reason, options a, c, and d are true, and the only false option present is b.

This question was answered based on the complete question found online that states:

Which statement regarding normal microbiota of the human respiratory system is FALSE?

a) The trachea normally may contain a few bacteria.

b) The upper respiratory tract is mostly sterile.

c) The ciliary escalator in the bronchial tubes keeps the lower respiratory tract nearly sterile.

d) Potentially pathogenic microorganisms are present in non-sterile portions of the respiratory tract but usually do not cause disease.

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Which Statement Regarding Normal Microbiota Of The Human Respiratory System Is False?

Related Questions

Do Grocery stores sell toothpaste cost?

Answers

Answer:

Yes they do sell toothpaste in grocery store because toothpaste is a essential thing we use in our daily life. The cost may vary from shop to shop. So we can not tell the cost of the toothpaste accurately.

Explanation:

Answer:

english please that made no sense but yes i do believe that stores sell toothpaste

Explanation:

Construct a table to give ONE source, the functions and the effects of the deficiency of the following micronutrients, Vitamin C, Vitamin D, Iron and iodine.​

Answers

Answer:

I say Vitamin D.

Explanation:Confirmed with the test results.

What is an ecological pyramid with explanation

Answers

Answer:

Explanation of Ecological pyramid :-

A graphical representation in the shape of a pyramid to show the feeding relationship of groups of organisms, and the flow of energy or biomass through the different trophic levels in a given ecosystem.

Examples of Ecological pyramid :-

The productivity pyramid is also called the energy pyramid. Sun is the primary source of energy. Fungi and bacteria are decomposers which can procure nutrient from any trophic level by breaking down dead and decaying organisms. These nutrients return to the soil and ate taken up by plants.3 Major Types of Ecological Pyramids :-

| Pyramid of Number, Biomass and EnergyPyramid of Number: It depicts the number of individual organisms at different trophic levels of food chain. Pyramid of Biomass .Pyramid of Energy.

Explanation:

Hope this helps you XD ✌️Carry on learning !!

Give 3 examples of microscopic organisms​

Answers

Fungi, algae, and yeast.

Which of the following is TRUE about ovarian cysts?

Answers

Answer:

d. All of the above

Explanation: is correct.

Answer:

ALL OF THE ABOVE

Explanation:

Hey this doesn’t make sense to me

Answers

Answer and Explanation:

The question is asking you any ingredients which are plants but contains in a pizza. It also said that it could include plants that are fed to animals so for example, beef is on top of the pizza then you can write grass.

Lymph is __________. excess tissue fluid that has escaped from arteries excess tissue fluid that has leaked out of capillaries excess blood that has escaped from veins

Answers

Answer:

Excess tissues fluid that has leaked out of capillaries.

This is a question on the circulatory system. I don't understand how the pathway that the blood goes through in the heart makes it oxygenated. Could someone pleas explain to me what each part does and how when it goes to the lungs it gets oxygenated?

Answers

Answer:

deoxygenated blood is pumped back to the heart with the superior vena cava and inferior vena cava. Blood is then in the right atrium then it is pushed to the right ventricle in the heart. it is the pumped through the pulmonary artery to the lungs(the pulmonary artery is the only artery that carries deoxygenated blood). In the lungs blood is pumped to the cappilleries in the bronchus where oxygen in the air is passed through to the blood with heamoglobin and thus now the blood is oxygenated. The blood is the pumped brought back to the heart with the pulmonary vein(the pulmonary vein is the only vein to carry oxygenated blood).It flows into the left atrium where it is then pushed down into the left ventricle and is then pumped up through the aorta to the whole body.

Explanation:

I hope this explains what you asked.

While eating dinner, Isabelle starts choking on a grape. She can't cough, talk, or breathe. What should her mother do to help her?

*Heimlich maneuver
(or buy a LifeVac device to keep in your car for emergencies)

Answers

Answer:

c. Do the Heimlich maneuver.

Explanation: is correct. post protected

during which part of the cell cycle does dna replication occur?

Answers

S phase “I think” hope it helps^_^

The element lithium has two common isotopes: Li–6 and Li–7 If the average atomic mass of lithium is 6.94004 u, determine its percent isotopic abundances. Step by step and explain.

Answers

First we need to determine the average atomic mass of these isotopes.

The atomic masses of Lithium-6 and Lithium-7 are 6.0151amu and 7.0160amu respectively.

Now that we have that, we need to set up the relative abundance problem.

We can do that using the formula (M1)(x) + (M2)(1-x) = M(E)

Because you asked for details, I'll explain what each variable stands for-

M1 = the mass of one isotope

x = the relative abundance

M2 = the mass of the second isotope

M(E) = the atomic mass of the element from the periodic table

Therefor all we do now is plug in our respective variable.

M1 = 6.0151amu (Lithium-6)

x = unknown relative abundance

M2 = 7.0160amu (Lithium-7)

M(E) = 6.94004amu

Now the formula plugged in will look like this:

6.0151x + 7.0160(1-x) = 6.94004

Now doing some quick math, we can determine that x=0.07589

For the last step we need to find the percent abundance of each element, which is quite simple. We take X and multiply it by 100 to find Lithium-6, so 0.076 x 100 = 7.6%

and since then we use 1 - X, so 1 - 0.076 = 0.924

We take that and also multiply it by 100, so 0.924 x 100 = 92.4%

Conclusion:

The abundance of the Lithium-6 isotope is 7.6%, and the abundance of the Lithium-7 isotope is 92.4%.

Please ask if you have any questions and I hope this was helpful!

what would be a likely result of expressing telomerase in somatic cells?

Answers

Answer:

cancer

Explanation:

What is the upper section of the pharynx which contains the adenoids?

Answers

Answer:

a. Nasopharynx

Explanation: is correct. post protected

what is the study of hereditary called?

Answers

Answer:

Genetics

Explanation:

Genetics is the study of heredity in general

HOPE IT HELPS!

All of the following among A-D apply to toll-like receptors EXCEPT A. they bind to PAMPS B. they induce the release of cytokines when activated C. they directly lyse bound pathogens D. when stimulated, they activate the immune system of the body E. there are no exceptions, A-D are all true

Answers

The toll-like receptors do NOT directly lyse bound pathogens (Option C). These protein receptors play fundamental roles in the innate immune system.

Toll-like receptors (TLRs) are single-pass membrane-spanning protein receptors that play fundamental functions in the innate immune system.

TLRs are differentially expressed on the surface of antigen-presenting cells (i.e., macrophages and dendritic cells) in order to recognize evolutionary conserved antigenic domains in different pathogenic microorganisms (e.g. bacteria).

TLRs initiate innate immune responses such as, for example, inflammatory responses, by identifying conserved pathogen-associated molecule patterns (PAMPs).

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Explain how protein electrophoresis is done. Is it different from DNA and RNA electrophoresis?

Answers

Electrophoresis is the process in which specific components are separated based on size.

As the name implies protein electrophoresis is used to determine proteins in a sample and DNA electrophoresis is used to determine DNA segments (and later sequences) in a given sample.

what was the first genetically modified food approved for sale in the us

Answers

Answer:

Flavr Savr™ Tomato

Explanation:

One variable not mentioned in the description of the experiment that could affect the results of the investigation is reduced canopy cover. Describe the effect that canopy cover would likely have on the results of the investigation.

Answers

The canopy cover can affect the results of an investigation because a higher canopy cover is accompanied by a decrease in the availability of sunlight.

The canopy cover is the proportion of the ground covered by vegetation when it is viewed from vertically above the planted area.

The level of canopy cover affects light availability on the ground and also its microclimate, thereby this feature can also alter any biological experimental procedure by affecting the level and type of biodiversity.

A reduced canopy cover may alter any experimental outcome by increasing the energy/light input in the ground cover stratum, thereby likely affecting biodiversity.

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What causes a substance’s identity to change during a chemical change?

Answers

Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties. ... One good example of a chemical change is burning a candle.



(Sorry if this didn’t help)

Question 27
A prokaryotic cell has which of the following?
A
Centrioles
B
Lysosomes
C
Plasma membrane
D
Mitochondria
©
Endoplasmic reticulum

Answers

Answer:

C) Plasma Membrane

Explanation:

The four main structures are Plasma membrane, ribosome, cytoplasm, and genetic material.

From a plant cell leucoplast is removed. What will its effect be on the cell functioning?.

Answers

Answer:

Leucoplasts (λευκός leukós "white", πλαστός plastós "formed, molded") are a category of plastid and as such are organelles found in plant cells. They are non-pigmented, in contrast to other plastids such as the chloroplast.

Leucoplasts, specifically, amyloplasts

Lacking photosynthetic pigments, leucoplasts are not green and are located in non-photosynthetic tissues of plants, such as roots, bulbs and seeds. They may be specialized for bulk storage of starch, lipid or protein and are then known as amyloplasts, elaioplasts, or proteinoplasts (also called aleuroplasts) respectively. However, in many cell types, leucoplasts do not have a major storage function and are present to provide a wide range of essential biosynthetic functions, including the synthesis of fatty acids such as palmitic acid, many amino acids, and tetrapyrrole compounds such as heme. In general, leucoplasts are much smaller than chloroplasts and have a variable morphology, often described as amoeboid. Extensive networks of stromules interconnecting leucoplasts have been observed in epidermal cells of roots, hypocotyls, and petals, and in callus and suspension culture cells of tobacco. In some cell types at certain stages of development, leucoplasts are clustered around the nucleus with stromules extending to the cell periphery, as observed for proplastids in the root meristem.

Etioplasts, which are pre-granal, immature chloroplasts but can also be chloroplasts that have been deprived of light, lack active pigment and can be considered leucoplasts. After several minutes exposure to light, etioplasts begin to transform into functioning chloroplasts and cease being leucoplasts. Amyloplasts are of large size and store starch. Proteinoplasts store proteins and are found in seeds (pulses). Elaioplasts store fats and oils and are found in seeds. They are also called oleosomes.

Identify the type of blood vessel shown below. How does its structure match its function?

Answers

Answer:

Can you also send the diagram

A DNA microarray contains immobilized DNA that corresponds to different genes. The microarray is hybridized with fluorescently labeled DNA probes reverse transcribed from the control and experimental mRNA samples. The control probe is labeled with a red fluorochrome, while the experimental probe is labeled with a green fluorochrome. What will be the color of the spot representing a gene with moderately upregulated expression in the experimental sample relative to the control one

Answers

The color of the spot of a gene with moderately upregulated expression will be lime-green. A DNA microarray is a technique used to determine the expression level of many genes simultaneously.

A DNA microarray is a laboratory technique used to identify the genes that are being expressed in a cell.

A DNA microarray contains many tiny spots of specifically labeled cDNA samples referred to as probes, which can be hybridized by base complementarity to transcribed (mRNA) gene sequences.

In the DNA microarray, the probes can be fluorescently marked gene sequences.

After hybridization, the DNA microarray is then scanned in order to determine the level of gene expression of each mRNA that hybridizes with their corresponding probes on the slide.

In this case, green spots evidence genes that are being strongly expressed in the sample.

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_____ acts on proteins to produce peptides which are later broken down into _____ in the small intestine

Answers

the enzyme pepsin acts on proteins to produce peptides which are later broken into amino acids in the small intestine

A) What structures form the male part of the flower

B) What structures form the female part of a flower

C) how do male gametes find female gametes in a flower ?describe with de​

Answers

Answer:

a - The androecium

b -  the pistil

c - Male gametes is the pollen and it find the female gamete by wind, pollenators, and water.

Explanation:

The process in which impurities are removed from a mineral​

Answers

Answer:

The removal of impurities is usually done chemically. For example, in the manufacturing of iron, calcium carbonate is added to the blast furnace to remove silicon dioxide from the iron ore. Zone refining is an economically important method for the purification of semiconductors.

Explanation:

with such a rich diverse array of life forms how are we able to live harmoniously with each other​

Answers

Explanation:

Life on earth is incredibly diverse. Biological diversity is the variety of life on earth. This includes all the different plants, animals, and microorganisms. Life on earth is incredibly diverse. Biological diversity is the variety of life on earth. This includes all the different plants, animals, and microorganisms; the genes they contain; and the ecosystems they form on land and in water. Biological diversity is constantly changing. The source of this diversity is evolution, the process of gradual change during which new species arise from older species. Evolutionary biologists study the evolution of living things in everything from the microscopic world to ecosystems. There are so much duversity in life on the Earth because there are great numbers of species on the earth, the present day organism are the end product of about 3.5 billion years of organic evolution on earth.

"Tall" "purple" and "wrinkled" are examples of?

Answers

Phenotype if genetics is the area

Tall purple and wrinkled are the examples of Phenotypes.

What are phenotypes?

The phenotype is the set of observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physiological properties, its behavior, and the products of behavior.

Moreover, the observable characteristics in an individual resulting from the expression of genes; the clinical presentation of an individual with a particular genotype.

Therefore, phenotype examples include earwax type, height, blood type, eye color, freckles, and hair color.

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_______and mucous work to trap dirt and germs
before we inhale.

Answers

Answer:

Cilia

Explanation:

     

how is glaciers melting in alaska a problem for humans

Answers

Answer:

The water will rise

Explanation:

We can drown

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