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aivan3 [116]
3 years ago
14

Cytotoxic T cells ________. self-destruct once the antigen has been neutralized require the double recognition signal of class I

MHC plus class II MHC on the target cell in order to function can directly attack and kill other cells of the body function mainly to stimulate the proliferation of other T cell populations
Biology
1 answer:
BlackZzzverrR [31]3 years ago
6 0

Answer:

Cytotoxic T cells are the only T cells that can directly attack and kill other cells.

Explanation:

Cytotoxic T cells, also called killer cells, are the only cells that have the ability to kill cells infected by foreign bodies that are recognized as a threat to the body. These cells act directly on foreign and virus-infected cells or anything else the immune system recognizes as dangerous.

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Feliz [49]

Answer:

1. Ends of the respiratory branches are called alveoli.

2. C. To control blood flow to different areas of the body depending on activities

Explanation:

1. The trachea divides into left and right primary bronchi which in turn divide multiple times upon entering the lungs and make the bronchial tree.

The final branches of the bronchial tree are the terminal bronchioles that lead to alveoli. The alveoli are the balloon-shaped structures and serve as the site of gas exchange between the blood and inhaled air.  

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8 0
3 years ago
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natima [27]

Answer: Thermal energy from the fire moves to the water in the form of heat.

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8 0
2 years ago
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Over [174]

Answer:

C

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5 0
2 years ago
When the light's energy is _______, this causes the highway to gain energy and warm up.
lara [203]

Answer: absorbed

Explanation:

8 0
3 years ago
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Hoochie [10]

Answer:

I believe the answer is B.

Explanation:

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7 0
3 years ago
Read 2 more answers
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