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ad-work [718]
3 years ago
13

FASSST!!!physical science!!!!!

Biology
1 answer:
Phantasy [73]3 years ago
5 0

Answer:

The answer is single replacement :)

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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
What happends as a river gets older
Vedmedyk [2.9K]

Answer:

Its channel widens.

Explanation:

7 0
3 years ago
If you pumped contaminated water from an aquifer, cleaned the water and pumped it back in what would happen?
SashulF [63]

Answer:

It’s impossible to know what would happen

Explanation:

If contaminated water is pumped form an aquifer, cleaned and pumped back, it would be impossible to know what would happen unless the source of the contaminant is known.

<u>If the source of the contaminant is known</u> and removed before the water is pumped back into the acquifer, the water would be clean and stay clean provided that all the water was initially pumped off. If the source of the contaminant is not known, it would be difficult to predict what would happen.

7 0
3 years ago
Aerobic respiration is used by organisms to __________. release oxygen create food make ATP store glucose
eduard

Answer:

Cells undergoing aerobic respiration produce 6 molecules of carbon dioxide, 6 molecules of water, and up to 30 molecules of ATP (adenosine triphosphate), which is directly used to produce energy, from each molecule of glucose in the presence of surplus oxygen.

Explanation:

4 0
3 years ago
Describe the two characteristics that dna needs to fulfill its role as a genetic material?
nataly862011 [7]
The DNA has to code for a protein and it has to replicate 
6 0
3 years ago
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