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inessss [21]
4 years ago
9

How does the structure of alveoli maximize gas exchange?

Biology
1 answer:
Bumek [7]4 years ago
3 0

Answer:

The alveoli are sacks coated on their inner wall by white and sticky liquid, they can be more than a millimeter in diameter and surface active agent. In them there is the exchange of gases between O2 and CO2.

They are evaginations of the epithelium of the air ducts with a single opening for the gases to exit and enter, controlled by the action of a smooth muscle sphincter. Its walls, called alveolar septa, provide a large increase in the exchange surface.

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Ringing in the ears is called:
Elza [17]

Answer:

c. tinnitus

Explanation:

Tinnitus (a hearing impairment) is a form of  hearing of sound when no external sound is present Which is often described as a Ringing,Tinnitus may also sound like a clicking or roaring. i.e usually unclear voices or music are heard. The sound may be soft or loud, low or high pitched, and appear to be coming from one or both ears. Ranging from one person to another, the sound may causes depression or anxiety and can interfere with concentration.

Otitis externa is a condition that causes inflammation , the inflammation also covers  (redness and swelling) of the external ear canal, i.e the tube between the outer ear and eardrum.

Meniere's disease popularly called (MD), is a disorder of the inner ear that is characterized by episodes of feeling like the world is spinning (vertigo), hearing loss, and a fullness in the  ear. The cause of MD involves both genetic and environmental factors. Some of the factors include constrictions in blood vessels, viral infections, and autoimmune reactions.

Otosclerosis is a condition where one or more foci of irregularly laid spongy bone replace part of normally dense enchondral layer of bony otic capsule in the bony labyrinth. This condition affects one of the ossicles (the stapes) resulting in hearing loss, vertigo or a combination of symptoms.

Therefore from the foregoing we can conclude that Tinnitus is the correct anwser.

4 0
4 years ago
Read 2 more answers
A gamete contains 15 chromosomes, how many chromosomes does the parent have?
Mariulka [41]

Answer: 15

Explanation: I think but is a gamete has 23 chromosome it has 23 parents chromosome so it should be the same equal

4 0
3 years ago
How do the skin's 3 layers differ?
ale4655 [162]

Answer:

<em>Hi Tadashi Here! </em>

Explanation:

Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.

<em>~Your Welcome Friend! :)</em>

6 0
3 years ago
Which level of organization is best represented by the liver?
siniylev [52]

Answer:

Organ level– an organ is a structure composed of at least two different tissue types that perform a specific function within the body. Examples include the brain, stomach, and liver. Complex functions begin to emerge at this level.

Explanation:

3 0
3 years ago
Which market structure is BEST indicated by the photograph? A) monopoly B) oligopoly C) pure competition D) modified competition
leva [86]

Answer:

b.) oligopoly

Explanation:

7 0
3 years ago
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