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Murljashka [212]
2 years ago
8

Which of the following is not a function of cell membrane

Biology
1 answer:
Rasek [7]2 years ago
7 0

Answer:

It provides energy to the cell is not a function of the cell membrane.

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Because it is difficult to excrete iron once it is in the body, iron balance is maintained primarily through absorption. The iro
Rzqust [24]
<h2>The given statement is true</h2>

Explanation:

Iron absorption occurs in the duodenum and upper jejunum of small intestine

  • At physiological pH ferrous iron is rapidly oxidized to the insoluble ferric form
  • Gastric acid lowers the pH in the duodenum which enhances the solubility and uptake of ferric iron
  • Once iron gets inside the enterocyte it can be stored as ferritin;Ferritin is a hollow spherical protein which helps in storage and regulation of iron levels within the body
  • Ferritin molecule have ferroxidase activity which helps in the mobility of Fe2+ out of the enterocyte by ferroportin
  • Transferrin is the major iron transport protein which transports iron through blood
  • Fe3+ binds to transferrin so Fe2+ transported through ferroportin must be oxidized to Fe3+
  • Fe2+ needs to be oxidized first so that it can be transported through ferroportin
  • Once iron gets inside the cell it can be used for various cellular processes
6 0
3 years ago
Because most cigar and pipe smokers do not ______, as a group they have a lower risk of cancer than cigarette smokers.
Artyom0805 [142]

Because most cigar and pipe smokers do not<u> </u><u>inhale the smoke</u> , as a group they have a lower risk of cancer than cigarette smokers.

The cigarettes, cigars, and pipe tobacco are made out of dried tobacco leaves. The other substances are usually added for flavor and to make smoking more gratifying. The smoke from these products is a complex mixture of chemicals produced by flaring tobacco and its additives.

There are at least 70 known chemicals to cause cancer. These cancer-causing chemicals are referred to as carcinogens.

It is so because cigars and pipes are usually believed to be less harmful way than to smoke tobacco. It was once a trend to use cigars in the 1990s, luring/dragging the young and the old.

Most of the people think cigars are less harmful to their health, but they actually pose the same risk for oral cancer as cigarettes do. Many cigar smokers don't inhale the smoke, but still the risk for oral, throat, and esophageal cancer is alike as for cigarette smokers.

To learn more about carcinogens here

brainly.com/question/984334

#SPJ4

5 0
1 year ago
what would happen to the water cycle if there was no rain. A. the water would all be trapped in the atmosphere. B Thee water wou
erik [133]
The answer is A.<span> the water would all be trapped in the atmosphere. </span>
8 0
3 years ago
An event lasts 4 hours and 20 minutes. How long did the event last in seconds?
daser333 [38]

The event last in 15,600 seconds.

Answer: Option B

<u>Explanation:</u>

We know that there is 60 seconds in one minute i.e., 1 minute = 60 seconds

There is 60 minutes in one hour. i.e., 60 minutes = 1 hour.

Given : An event lasts 4 hours and 20 minutes

4 hours contains 240 minutes,

               4 \times 60=240 \text { minutes }

When the above expressed in seconds,

              240 \times 60=14400 \text { seconds } ------>eq. 1

When 20 minutes expressed in seconds,

              20 \times 60=1200 \text { seconds }------->eq. 2

Adding both eq. 1 and 2, we get

          4 hours and 20 minutes = 14400 + 1200 = 15600 seconds

7 0
3 years ago
Describe ONE example of poaching that is prevalent in your area.
tia_tia [17]
In British Columbia, western Canada, renowned for its's coniferous forests, the poaching of protected magnificent old growth trees is fairly common and examples have been found in our park-protected areas of cutting of 800-1000 year old giants  in the Carmanah Walbran Provincial Park. 
5 0
3 years ago
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