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anastassius [24]
3 years ago
6

Which immune system cells act as hungry scavengers that trap and ingest worn-out cells?

Biology
1 answer:
Alexus [3.1K]3 years ago
6 0
The answer is macrophages. This is a large cell that has the capability of engulfing targeted cells that are infected or damaged. It is a developed monocyte that came from the bloodstream. It has a system of alerting white blood cells and also can be remembered by the immune system once it has been encountered again.

source: https://www.news-medical.net/life-sciences/What-is-a-Macrophage.aspx
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Use numbers to indicate the order of steps in the pyruvate dehydrogenase complex: 1. _______Decarboxylation of pyruvate to an al
liubo4ka [24]

Answer:

1-4-2-3-5

Explanation:

The PDHC is made up of multiple copies of 3 different enzymes: pyruvate dehydrogenase (PDH, E1: 20-30 copies), dihydrolipoamide S-acetyltransferase (DLAT, E2: 60 copies) and dehydrogenase dihydrolipoamide, (DLD, E3: 6 copies). The complex also requires five different coenzymes: CoA, NAD +, FAD +, lipoic, and thiamine pyrophosphate (TPP). Three of the complex coenzymes are closely linked to the complex enzymes (TPP, lipoic acid, and FAD +) and two are used as carriers of the products of PDHC activity (CoA and NAD +). The pathway for oxidation of PDH from pyruvate to acetyl-CoA is a diagram below.

6 0
3 years ago
State two examples of situations where active transport occurs
Cloud [144]

When something needs to be transported against its concentration gradient, or a molecule is too big to simply diffuse through a membrane, active transport has to be used. So active transport requires energy (ATP).

Examples:

1. Antiport pumps: transport one substance in one direction while transporting another substance the other way. An example of this is the sodium-potassium pump.

2. Symport pumps - uses a substance that wants to move from an area of high concentration to low concentration and carries another substance against its concentration gradient. An example of this is the sodium-glucose transport protein

3. Endocytosis - large amounts of extra cellular fluid can be taken into a cell - needs ATP to bind proteins in the cell membrane and causes them to change their shape...which eventually causes the surrounding of the fluid to be brought in (a vesicle).

4.exocytosis - opposite of above

8 0
3 years ago
Which one of the following statements is accurate?
DochEvi [55]
I believe the answer is D. the green revolution was instrumental in the increase of the world's food supply, but I may be wrong because it does have some negatives.
8 0
3 years ago
What is an effect of a compromised immune system?
xz_007 [3.2K]

Answer:

With a compromised immune system, people have a far more difficult time fighting off disease. Due to this, their bodies are more vulnerable to getting such diseases and cannot create the antibodies needed to fight the disease off.

8 0
3 years ago
Read 2 more answers
7)
GrogVix [38]

Answer:

C)  DNA or RNA

Explanation:

Genetic material is found in both viruses and in living single-celled organisms, such as protozoans and bacteria.

8 0
3 years ago
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