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Alexxx [7]
2 years ago
9

In the immune system, which cell is responsible for recongnizing an antigen producing the activating B- cell proteins?

Biology
1 answer:
Ratling [72]2 years ago
4 0

T killer cells are responsible.

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Your heart has four valves. Normally, these valves open to let blood flow through your heart, and then shut to keep it from flow
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Regurgitation influences the flow of blood by mixing the oxygen-poor blood with the oxygen-rich blood. Due to this, the heart has to pump more to oxygenate the entire body, leading to the rapid, and fluttering heartbeat. The tissues get oxygenated but regurgitation could be fatal, as the heart cannot function overtime forever.  

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Stenosis makes the ventricles to pump overtime to get enough blood through, and in the process, the ventricles thicken. This functions for a while, however, it will result in heart failure as the heart cannot do it for entire life. The tissues are oxygenated, but it will be an issue due to overtime.  


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3 years ago
_________is/are an essential part of our nerves, spinal cord, brain, and cell membranes.
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7 0
3 years ago
Which statements are additions to cell theory, called modern cell theory? Check all that apply.
Marysya12 [62]
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5 0
2 years ago
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Why do you seldom see fossils in metamorphic rocks?
Sergeu [11.5K]

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Explanation:

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