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bulgar [2K]
3 years ago
5

What is the purpose of a watery fluid in the lungs that contains a surfactant, which is a detergent-like substance composed of p

roteins and lipids?
Biology
1 answer:
vovangra [49]3 years ago
6 0
The watery fluid of the lungs is a surfactant produced by type II alveolar cells which is mainly composed of lipids such as lecithin and sphingomyelin and proteins. The main function of the surfactant is to reduce the surface tension in the alveoli to prevent spontaneous collapse or atelectasis. 

<em>The clinical significance of this is that premature babies are not born with enough surfactant therefore their lungs collapse and they develop a disease called respiratory distress syndrome. </em>
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chambers A and B are placed next to each other but are separated by a film permeable to both glucose and fructose. chambers A co
Molodets [167]

Answer:

2.glucose move into chamber B faster than fructose

Explanation:  

  • Facilitated diffusion: refers to the transport of hydrophilic molecules that are not able to freely cross the membrane. Channel protein and many carrier proteins are in charge of this <u>passive transport</u>. If uncharged molecules need to be carried <u>this process depends on concentration gradients</u> and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an electrochemical gradient. The glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.  Facilitated diffusion is a passive transport process because the cell does not need any energy to make it happen.  

The exposed scenario is an example of facilitated diffusion, a process that occurs in favor of the concentration gradient, and which rate depends on the concentration of molecules in each side of the membrane, in this case, glucose and fructose, among other factors that might also influence the diffusion rate. So, as the concentration of glucose is higher in chamber A (80%), and lower in chamber B (20%), in comparison with fructose, the first one will diffuse faster than fructose. The difference in concentration between both chambers is sharper in glucose, so its transport is faster than the fructose transport, which will also diffuse but at a lower rate.

7 0
3 years ago
The process by which volcanoes vent water vapor, carbon dioxide, nitrogen, and other substances is called ____.
zvonat [6]

Answer:

The process by which volcanoes vent water vapor, carbon dioxide, nitrogen, and other substances is called outgassing.

8 0
3 years ago
Read 2 more answers
Which of the following statements is true as the moon goes from new moon to full moon
Oliga [24]

Answer:

We see more of the lighted side of the moon because it is growing, so we see more

The time it takes to go from new moon to full moon is 2 weeks, because it takes a whole month (4 weeks) to go from new moon to full moon to new moon

P.S. PLEASE give me Brainliest?

5 0
3 years ago
Metabolic pathways can be controlled through the availability of enzymes and modulation of their catalytic activities. Enzyme av
postnew [5]

Answer: a) substrate and cofactors b) covalent modification

Explanation:

Metabolic pathways involve all the chemical processes takes place in the enviornment or in an organisms.The metabolic pathways are controlled through the catalytic activities of enzymes.

The availability of enzyme is regulated  by substrate and cofactors present in enzyme and enzyme activity is commonly regulated via covalent modification.

Enzymes are highly selective in nature and bind to a specific substarte only. The active site in enzyme binds with the substrate to form enzyme substrate complex. Coactors assist the enzyme activity, without cofactor enzyme can not perform its activity.

Hence enzyme availibility is regulated by  substrate and cofactors regulates.

Covalent modifications regulates activity of enzyme as it involves addition and removal of chemical group to synthesis required protein. It can change the chemical properties of the site by targeting one or multiple amino acid.

Thus the correct answer is a) substrate and cofactors b) covalent modification

8 0
3 years ago
Which of the following best describes the logic of scientific inquiry?
beks73 [17]

Answer:

d. if my hypothesis is correct, I can expect certain test results

Explanation:

To create a theory is not enough to state an assumption. Called scientific research, the practice tries, through a logical procedure, to produce tested, proven and safe scientific knowledge. This concept is based on the logic of scientific research that states that a hypothesis must be tested, because if the hypothesis is correct, certain test results can be expected. For this, some rules or phases are part of the process. And they are: observation, hypotheses, research method and conclusion.

Thus, we can conclude that among the alternatives presented, the one that best describes the logic of scientific investigation is the letter D.

4 0
3 years ago
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