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Crank
3 years ago
8

What does facilitated diffusion across a cell membrane require

Biology
1 answer:
professor190 [17]3 years ago
8 0

Answer:

Explanation: In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into or out of, the cell by moving down it.

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What is the name often given to the force exerted by the first object on a second object?
jeyben [28]
:::: :: action force
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3 years ago
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Write a letter to a friend abroad explaining how independence day is celebrated in Ghana.​
RideAnS [48]

A letter is a type of non-fictional written, typed, or printed communication. These are typically sent to the receiver via mail or postal service in an envelope and are typically written to facilitate communication between two people.

A 12, Civil lines,  

XYZ Road,  

Delhi.

23 Aug. 2022,

I hope you and your family are doing good. I am writing this letter to let you know the way we celebrate independence day in Ghana. All the streets and roads are decorated with confetti. Firecrackers are being lit everywhere. The kids are getting their faces painted with Ghana's flag. My mother is also cooking a special dinner for all of us. I will send you pictures of the entire event. Thanks!

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To learn more about letter writing refer here: brainly.com/question/23864960

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3 0
2 years ago
Olympic athletes train in Colorado Springs, Colorado because this location is at high altitude and near the 14,000 foot Pikes Pe
Stels [109]

Answer:

A: Oxygen levels are low and, therefore, more red blood cells are produced, giving the athletes an advantage when competing at lower altitudes.

Explanation:

<em>At high altitudes, the partial pressure of oxygen is lower compared to lower altitudes</em>. The body system try to adjust to lower oxygen level by undergoing several physiological changes. Depending on the duration spent in high altitude, the body can either try to adjust in the short term or acclimatize for a longer term.

One of the processes the body undergoes during acclimatization is an increase in red blood cell production. The kidney secretes erythropotein in response to inadequate oxygen in body tissues, and this makes the liver to increase erythrocyte production.

The increase in red blood cell production correspondingly increases the oxygen-carrying capacity of the blood as a result of increased hemoglobin. This condition persists for a few weeks even after the body returns to lower altitude where oxygen is adequate. Increased oxygen capacity means the rate of energy production (through respiration) within the body will also increase

<em>Hence, those who acclimatize to high altitude usually experience increased capillary density, tissue perfusion and improved athletic performance at lower altitudes. </em>

The correct option is A.

3 0
3 years ago
In a certain breed of dogs, black hair is dominant and brown hair is recessive. If two parents are heterozygous for black hair,
Bezzdna [24]
There is a 3/4 chance their offspring will be black. If you make a Punnett's (I hope that's how you spell it) square then you will find that one offspring will be homozygous for black hair, two will be heterozygous with black hair, and one will be homozygous with brown hair. Therefore, there's a 3/4 chance the offspring will have black hair. Hope this helped!
7 0
4 years ago
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What is adaptation? What are the two types of adaptation? Give an example each.
il63 [147K]

Answer:

adapting can be learning from your environment and ways to survive etc.

Adapting can also go to sexual reproduction to survive diseases unlike asexual reproduction.

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