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LuckyWell [14K]
2 years ago
11

What is the name of substance that the cells do not recognize in the body?

Biology
1 answer:
aivan3 [116]2 years ago
6 0

Answer:

“Non-self” materials have proteins and other substances on their surfaces that the body doesn't recognize, called antigens.

Explanation:

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Which example is a trace fossil?
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Answer:

B.) Dinosaur footprint

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In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals
Masja [62]

Answer:

The correct answer is - operation of reflex arc.

Explanation:

The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.

Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.

In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.

Thus, the correct answer is - operation of reflex arc.

8 0
3 years ago
Identify the choice that best completes the statement or answers the
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How is a generic embryonic cell different from a differentiated cell?
Rom4ik [11]

A generic embryonic cell is different from a differentiated cell because it has a specific structure to perform a certain function. During development, cells become increasingly different from one another so that they can be specialized for specific functions.

<h3>What are embryonic cells?</h3>

These stem cells come from embryos that are 3 to 5 days old. At this stage, an embryo is called a blastocyst and has about 150 cells. These are pluripotent (ploo-RIP-uh-tunt) stem cells, meaning they can divide into more stem cells or can become any type of cell in the body.

With this information, we can conclude that Cell differentiation is how generic embryonic cells become specialized cells. This occurs through a process called gene expression. Gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions.

Learn more about embryonic cells in brainly.com/question/11980984

#SPJ1

3 0
2 years ago
Identify the fuel that could be classified as a nonrenewable or renewable resource.
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Explanation:

Takes time to reproduce it.

5 0
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