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yulyashka [42]
3 years ago
8

What is a stem cell?

Biology
1 answer:
Mazyrski [523]3 years ago
5 0

Answer:

stem cell are special human cell that are used to develop the different cell like muscles cells , brain cell etc.

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The lungs remain inflated because ___________.a. intrapleural pressure is exactly equal to atmospheric pressure b. intrapleural
kkurt [141]

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

8 0
3 years ago
Answers?<br> plz i need them i wasnt in class this day
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This is a lab report you need to do that on your own

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A student wonders whether removing the nucleus from a cell would result in a new prokaryotic cell. Why would this procedure fail
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A.) the cell would lack genetic information
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A ____________________________ is the connective tissue that connects bones to bones. *
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Explanation:

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if an organism occupies the secondary consumer trophic level in other food chains within a given food chain, is that organism al
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The organisms that eat the primary consumers are called secondary consumers. Secondary consumers are generally meat-eaters—carnivores. The organisms that eat the secondary consumers are called tertiary consumers. These are carnivore-eating carnivores, like eagles or big fish.

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