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Dmitriy789 [7]
2 years ago
11

Why are the cells of the alveoli so flattened?

Biology
1 answer:
Advocard [28]2 years ago
3 0

Gas exchange occurs in the alveoli of the lungs and each is made from a single layer of flat cells, Many alveoli in the lungs, so a large surface area for exchangement of C02 and O2. They are surrounded by a network of capillaries and oxygen diffuses out of them via the alveolar epithelium to the hemoglobin.

Hope this helps

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white blood cell with fragments in its cytoplasm a. agranulocyte b. granulocyte c. thrombocyte d. platelet
Serjik [45]

Answer:

B. Granulocyte

Explanation:

Granulocyte is the type of white blood cell with fragments in its cytoplasm. These fragments usually help in the digesting the cells of the foreign body(pathogenic organisms).

There are three main types of Granulocytes which are known as the Neutrophils, eosinophils, and basophils. They all perform variety of functions ranging from phagocytosis to cell lysis of foreign bodies.

8 0
2 years ago
In your own words, explain why a virus such as the rhinovirus, which relies on close contact to spread, might evolve to favor le
Zielflug [23.3K]

Rhinoviruses are transmitted through the air or via contact. We might expect this sort of transmission to require a fairly healthy host (one who gets out and comes into contact with others) and, hence, to select against virulent strains. If we take precautions and try to stay away from people or avoid any contact with people, more hand-washing stations, increased attention to sanitization, and isolation of patients will help to reduce the transmission of the disease and, in the process, may favor the evolution of less virulent strains of the virus.

7 0
2 years ago
Read 2 more answers
\"Your words are bees about a pear-tree\" is an example of a:. a. metaphor. b. hyperbole. c. simile. d. paradox
Anarel [89]
The correct answer to this question is letter " a. metaphor." <span>Your words are bees about a pear-tree. From that statement, it is comparing words to the bees without the use of any keywords like "like and as ... as." So this is definitely a metaphor, not a simile.</span>
4 0
2 years ago
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The arctic fox is different from the brown fox. The color of the arctic fox’s fur changes to brown during the summer. The fur re
Fofino [41]
The Arctic Fox lives in the Arctic Tundra (more or less around Alaska, Iceland I think, and other places like that). During the winter, their fur is very thick and solid white (not always SOLID but generally speaking). During the summer and spring, their fur turns brown.

1. Of course, during the winter in those regions, it's going to be snowing and ice is going to be all over the ground. By having a white coat, they're able to blend in and hide from predators, such as the Arctic Wolf and Polar Bears. By turning brown, they'll be able to blend in with the dirt after the snow and ice melts, and again, hide from predators. For the other fox, their brown coat blends in with the dirt, trees, dead leaves, etc. and they'll be able to hide from prey and predators alike. 

2. The Arctic Fox also has very thick fur during the winter, which allows it to survive the extreme temperatures. They also dig burrows in the snow for shelter in blizzards. This gives them the ability to survive natural disasters (at least one of them).

I can't think of a third one but these should give you a pretty good idea of how their adaptations help them survive. I really love the Arctic fox so I know quite a bit about them. I really hope this helps you.
7 0
2 years ago
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In bacteria, the antibiotic erythromycin prevents ribosomes from functioning. The MOST likely reason that bacteria die from trea
svlad2 [7]

Answer:

inhibits translation

Explanation:

Bacteriostatic macrolide antibiotic produced by Streptomyces erythreus. Erythromycin A is considered its main active component. In sensitive organisms, it inhibits protein synthesis by binding to 50S ribosomal subunits. This binding process that inhibits peptidyl transferase activity and interferes with the translocation of amino acids during translation and protein assembly.

The bacteriostatic effect consists in producing the inhibition of bacterial growth; Meanwhile, immunogenesis is expected to provide the necessary defensive elements for disease control. Therefore, these antimicrobials should not be indicated to the immunocompromised patient. They act in the stationary phase of bacterial growth.

Some antibiotics have a bactericidal or bacteriostatic effect depending on whether the drug acts in vivo or in vitro, and depending on the dose administered. For example, Amphotericin B, has fungistatic effect in vivo and fungicide in vitro; Streptomycin and erythromycin have bactericidal effect when administered at high doses and bacteriostatic effect if administered at low doses.

4 0
2 years ago
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