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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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False

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1 year ago
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Column A Column B a. Astrocyte b. Axon c. Collateral d. Dendrite e. Myelin f. Neurilemma g. Neurofibrils h. Nissl bodies (chroma
xenn [34]

Answer:

1.) neurilemma (option f)

2.) nissil bodies (chromatiophillic substance)

3.) neurofibrilis ( option g)

4.) myelin ( option e)

5.) dendrite ( option d)

6.) collateral ( option c)

7.) astrocytes (option a)

8.) axon ( option b)

9.) Unipolar neuron (option i)

Explanation:

The neurological terms described above are different parts of a nerve cell or neurones. The nerve cells are the basic Structural units of the nervous system. They are highly specialised for transmitting electric impulses. They can also be grouped according to the number of processes they possess, for example, the UNIPOLAR NEURONS( those with one process only). Each neuron, however, is composed of the same basic parts which include:

--> The CELL BODY: they may be angular or oval in shape with a large nucleus and dense granulated cytoplasm. In the cytoplasm, rough Endoplasmic reticulum which contains CHROMATIOPHILLIC SUBSTANCE (nissil bodies) and Golgi apparatus are also seen.Network of threadlike structures known as neurofibrilis are also seen within the cell body and extending into axon.

--> DENDRONS: these are one or more extensions which branches to form many fine dendrites. The DENDRONS carry nerve impulses( action potential) that their dendrites receive to the cell body.

--> AXON: this is a long process which branches at it's free end to end in synaptic knobs. It carries electric impulses away from the cell body. Most times, a substance of Schwann cell known as MYELIN SHEATH which is composed of lipoprotein insulates axons and increases impulse speed.

3 0
1 year ago
When writing DNA, you may only write what 4 bases?
skad [1K]

Answer:

A's T's C's and G's

Explanation:

Adenine, Thymine, Cytosine, and Guanine

8 0
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An octopus reproduces only once in its life, but it may have more than 100,000 offspring, depending on the species. Certain spec
galina1969 [7]

Answer:

<em>The correct option is C) The success of a species depends on the number of offspring that survive long enough to reproduce.</em>

Explanation:

Some species of animals such as the octopus might give rise to many offspring, but these offspring might not survive due to different reasons. Only a few of them will be able to survive until the age where they can reproduce.

On the other hand, the survival rate of offspring which are formed in lesser numbers is more. These offspring are taken care of by their parents usually or are better adapted to live in the environment. Hence, their survival rate is more.

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Kimberly is observing the behavior patterns of a bird species in the wild. During her observational period, a forest fire sweeps
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