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solmaris [256]
3 years ago
15

The lungs remain inflated because ___________.a. intrapleural pressure is exactly equal to atmospheric pressure b. intrapleural

pressure is exactly equal to intrapulmonary pressure c. intrapleural pressure is less than intrapulmonary pressure d. intrapulmonary pressure is less than intrapleural pressure
Biology
1 answer:
kkurt [141]3 years ago
8 0

Answer:

Option C,  Intrapleural pressure is less than intrapulmonary pressure

Explanation:

During inspiration, the air enters the lungs due to lower pressure in the intrapulmonary or intra-alveolar  than the atmospheric pressure. During quite respiration, the intrapulmonary pressure reduces to a pressure that is 3 mm Hg lower than that of atmospheric pressure. During quiet expiration, the intrapulmonary pressure rises up to a pressure that is 3 mm Hg higher than that of atmospheric pressure. This leads to lack of air in the intrapleural space thereby producing intrapleural pressure which is lesser than that of intrapulmonary pressure.  

This difference in pressure (i.e higher pressure with in the lungs than the atmosphere)  causes lungs to remain attached to the chest wall and hence looks inflated.  

Hence, option C is correct

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The Tuskegee syphilis study raised serious concerns about ethical research because the researchers ________.
aivan3 [116]

Answer:

a) withheld information from test subjects about their condition

Explanation:

The Tuskegee syphilis study which was carried between 1932-1972 in the Macon County, Alabama on the African-Americans infected from syphilis.

The U.S. Public Health Service started the study promising the infected persons that they will receive the benefits from the studies like a healthy meal, proper antibiotic medication and other benefits.

But the U.S Public Health Service failed to provide the services mainly the medication in which antibiotic penicillin which could treat the disease was not provided to the patient. As a result of this, syphilis continued in their generations also and people and about 100 subjects died.

They were told that they had bad blood which cannot be treated and thus in 1972, this raised a question over this issue related to ethics as to why the penicillin was not provided as well why the person was kept away from the reality.

Thus, Option-A is the correct answer.

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3 years ago
1. Lynn is a 2-year-old girl. Her mom and she like to play a game where her mom pretends to
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Answer:

Conditioned response.

Explanation:

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7 0
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Select 3 true statements about Analogous Structures
Debora [2.8K]

Answer:

A. They have the same function

B. They have evolved independently

C. They indicate an evolutionary relationship

Explanation:

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Explanation:

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8 0
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