What are some functions of the plasma membrane?

Biology

1 answer:

leva [86]4 years ago

5 0

Answer:

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

You might be interested in

The nurse is providing discharge instructions to the parents of a child who has undergone surgical correction of hypospadias. wh

Sonbull [250]

Hypospadias is a condition in males where the opening of the urethra is a the bottom of the penis. This results in the following complications which should be reported immediately:
<span>
When the temperature is greater than 101 °F

Excessive bleeding (some spotting or blood stains on the dressing is normal)

Extreme irritability

Excessive pain

Increasing redness of the penis

Disinterest in eating and drinking (particularly after 24 hours)

Continuous vomiting

Change in urination

Difficulty urinating (pushing when he urinates)</span>

5 0

3 years ago

What is the relationship between particle size and capillarity?

tekilochka [14]

Constant.If the soil particle size decreases the capillary action will take longer to rise.

8 0

3 years ago

In muscles, ATP is generated by glycolysis from two sources of glucose. One source is glucose that is broken down from glycogen

fgiga [73]

Answer:

The answer is B a net 2 ATPs are always generated per glucose regardless of its source

Explanation

Glycogen breaks down in the muscle so as to have enough glucose for muscle contraction and it produces 2ATPs

Glycogen also breaks down in the liver to release enough glucose which gets to the blood stream and is then taken up by other cells. It also produces 2ATPs at the expense of 6ATPs

3 0

4 years ago

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. The ancient whale is extinct and is bel

Likurg_2 [28]

i think it the letter A

3 0

3 years ago

Read 2 more answers

Once pathogens have penetrated the non-specific barriers, they are confronted by macrophages and natural killer cells. how do th

laiz [17]

Answer:

When a pathogens cross non-specific barriers (skin) they disturb the homeostasis of the body. however inside body they are confronted by different types of white blood cells which are responsible for bringing homeostasis again in the body. these are described below.

Role of macrophages in maintaining homeostasis

Macrophages are white blood cells (phagocytes) constantly patrolling in the body and destroy other cells by engulfing and ingesting them through the process of phagocytosis. These are produced in bone marrow cells as monocytes which have short life of only 10-20 hours. Once monocytes leave the blood they become macrophages. From bone marrow to the blood, macrophages are transported to the area of the body where they are needed. Macrophages engulf the whole body, after digesting particles (bacteria) can extrude the residual particles. Thus, provide protection by trapping and destroying microorganisms entering the tissue. They also secrete different proteins. Some of these proteins trigger the maturation of monocytes into macrophages, thereby increasing their numbers. Another protein interleukin-1 signals the brain to raise the body temperature, producing fever. The higher temperature aids the immune response and inhibit the growth of invading microorganisms.

Role of natural killer cells in maintaining homeostasis

They are another class of white blood cells that don’t directly attack invading microbes. Instead they strike at the body’s own cells that have been invaded by viruses. Virus infected proteins bear viral proteins on their surfaces. Natural killer cells recognize and kill cancerous cells. They secrete proteins into plasma membrane of the infected or cancerous cells. They also secrete enzymes that break up some of the molecules of the target cells, as a result the target cell soon dies.

6 0

3 years ago