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almond37 [142]
2 years ago
12

1. Investigate the different parts of the human immune system and explain which cells/products of innate and adaptive immunity a

re responsible for recognizing antigens on the surface of T. brucei and clearing the parasite.
Biology
1 answer:
scoundrel [369]2 years ago
3 0

Answer:

They are neutrophils, eosinophils, basophils, lymphocytes, and monocytes.

Out of these ones the T-cells are responsible for recognizing antigens on the surface.

Explanation:

T cells

Killer T cells

Killer or cytotoxic T cells scan the surface of cells in the body to see if they have become infected with germs, or if they have turned cancerous. If so, they kill these cells.

Helper T cells

Helper T cells "help" other cells in the immune system to start and control the immune response against foreign substances.  

Regulatory T cells or Tregs

Tregs control or suppress other cells in the immune system. They have both helpful and harmful effects.

Memory T cells

Natural killer T cells

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What is bay bottom chert?
Nataliya [291]

Answer:

A peloidal packstone with large areas of chalcedenous void filling. Sometimes chalcedony is clear and translucent giving the chert a clotted or splotchy appearance. Occasional fossils including Peneropolids and Sorites. Vuggy, grainstone or packstone fabric.

Explanation:

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5 0
2 years ago
Which of the following modifies and smoothes the respiratory pattern?
stealth61 [152]

The correct answer is: A) pontine respiratory centers

The respiratory centre in the pons is responsible for generating and maintaining the rhythm of respiration. Besides this elementary function, it also has the ability to adjust respiration rhythm in c response to physiological changes. Respiratory centre consists of three major respiratory groups of neurons:

•  The dorsal respiratory group (DRG)- initiates inspiration (inhalation)

• the ventral respiratory group (VRG)-responsible for exhalation

• Pontine respiratory group- includes the pneumotaxic (controls both the rate and the pattern of breathing) and apneustic centers (promotes inhalation by sending signals to dorsal group).

6 0
2 years ago
Large proteins, like DNA polymerase and hemoglobin, are often composed of several polypeptides that are linked together. The ___
AnnZ [28]

Answer: Primary

Explanation: The primary level of protein structure explains the sequence of amino acid linked together by peptide bonds to form polypeptide chains . A slight change in the amino acid sequence of Hemoglobin can alter hemoglobin function.

The primary level of protein structure is essential in the function of the protein any alteration in the amino acid sequence can disrupt the function of the protein.

4 0
2 years ago
What amino acid can be obtained by the reductive amination of γ-ketoglutaric acid
Svetradugi [14.3K]

Answer:

Glutamic acid

Explanation:

Reductive amination is a form of amination that involves the conversion of a carbonyl group to an amine via an intermediate imine. The carbonyl group is most commonly a ketone or an aldehyde. In this reaction, in the presence of enzyme glutamate dehydrogenase, ammonium ion directly combines with alpha-ketoglutaric acid, to form glutamic acid (amino acid) and for this to happen, a reduced coenzyme (NADPH) is required.

The biosynthesis of glutamic acid  can be obtianed from the reductive amination of γ-ketoglutaric acid

γ-Ketoglutaric acid is a common precursor in synthesis of glutamic acid. Addition of NADPH and ammonia or alpha amino acid with   γ-Ketoglutaric acid produces glutamic acid. Enzymes involved in this reduction amination  process are glutamate dehydrogenase and/or transaminase.

5 0
2 years ago
Cliff Company traded in an old truck for a new one. The old truck had a cost of $200,000 and accumulated depreciation of $40,000
masya89 [10]

Answer:

1,95,000 dollars

Explanation:

The recorded value of any commodity depends on the following elements:

- The instance value of the commodity on a page

- Additional value paid for buying the commodity and

- Other expenditure related to purchase of commodity

Here in this case, the recorded value of the truck is equal to the sum of trade allowance and additional payment to acquire new truck

Thus, recorded value of truck

= 1,53,000 + 42,000\\= 1, 95, 000

4 0
2 years ago
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