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Hatshy [7]
3 years ago
12

The human brain is an example of a A) cell B) tissue C) organ D) organ system

Biology
1 answer:
Elis [28]3 years ago
7 0
C organ rjrjrrjrjrjfjffjhdddhdhdhdehrhfhcbddbdhdhchchchrrb
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Plz help me well mark brainliest if correct!!..
erma4kov [3.2K]

Answer:

four layers

Most rainforests are structured in four layers: emergent, canopy, understory, and forest floor.

Explanation:

6 0
3 years ago
On a backpacking trip, Kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 Calories. At the school tra
olganol [36]

Answer:

A. If the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt."

C. After about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce ATP, resulting in "oxygen debt."

Explanation:

There are two sources of carbohydrates in the human's body for energy (ATP) production. 1) Creatine phosphate and 2) Glycogen. Creatine phosphate metabolizes easily and yields ATP quickly. Whereas glycogen is stored form of carbohydrate which yields energy more slowly. Therefore, initially, our bodies use creatine phosphate and then shift to glycogen. Within 60-90 seconds, the creatinine phosphate in the body is mostly utilized and then energy is produced by the use of glycogen in aerobic pathway. During areobic pathway, oxygen supply is sufficient and per cycle, it produces 32 molecules of ATP. However, when oxygen supply is limited or absent, the body will metabolize glycogen to lactic acid via fermentation and produce only 2 molecules of ATP.

Now consider the example: Kenny hikes all day at a steady pace therefore the supply of oxygen is sufficient for aerobic cellular respiration for ATP production. In this scenario, the oxygen debt is minimal and Kenny relies on aerobic respiration pathway to obtain energy. On the other hand, Janelle runs fast (100 meters in 13.5 seconds) and her cellular respiration would be on the compense of aerobic pathway initially which will be shifted to anaerobic pathway after the supply of oxygen is reduced/minimum. Janelle will heavily rely on the anaerobic pathway because running fast needs energy which cannot be provided via aerobic pathway easily. Therefore, Janelle's body will produce lactic acid and suffer from oxygen debt.

7 0
3 years ago
You compare them to see what is different. Sample 1: ATTACAGTACTGGCA Sample 2: ATTACAATACTGGGCA
shtirl [24]
Answer: A gene mutation.
8 0
3 years ago
Which statement explains how the fossil record supports the theory of evolution?
mr_godi [17]

It's B

Explanation:

Because the fossil record shows how organisms have evoluate from relatively simple organisms to more complex organisms

4 0
3 years ago
Read 3 more answers
The function or job of the nervous system is: *
FinnZ [79.3K]

Answer:

B

Explanation:

According to my knowledge the nervous system receives and transport feelings from different parts of our body to the brain and the opposite.

<em>Hope</em><em> </em><em>it's</em><em> </em><em>helpful</em><em>.</em><em>.</em><em>.</em><em>.</em><em> </em>

7 0
2 years ago
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