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Zinaida [17]
3 years ago
11

In the developing fetus, the umbilical __________ carries blood rich in nutrients and oxygen to the fetus.

Biology
1 answer:
vesna_86 [32]3 years ago
6 0
Cord? Or maybe vein. But I strongly believe it’s cord
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On a backpacking trip, Kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 Calories. At the school tra
emmasim [6.3K]

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."

D. The rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.

Explanation:

It is important to consider that Kenny hikes all day but at a steady pace, whereas Janelle runs very fast. So Kenny's case, the supply of oxygen is sufficient to maintain aerobic respiration within the muscle cells. During this process only CO2, Water, and ATP are produced; therefore, there is no oxygen debt. We should keep in mind that the body shifts to anaerobic metabolism only when the supply of oxygen is limited.

In Janelle's case, running fast would need energy at higher rates and the supply of oxygen would not be sufficient to generate a high amount of ATPs. Therefore, to compensate for this deficiency, cells will start fermenting glucose to lactic acid and produce ATP and maintain energy demands. This lactic acid causes fatigue and this is why Janelle has aching and breathing hard. Breathing hard is also automatic reflux to inhale more oxygen and meet oxygen demands but even breathing hard would not be able to make it and the body will shift to anaerobic respiration automatically.

5 0
2 years ago
How many chromosomes foes the nucleus of heart muscle cell contain?
shtirl [24]

Answer:

46 chromosomes

Humans have 23 pairs of chromosomes, so our hearts have 46 chromosomes.

Explanation:

Hope it helps

8 0
2 years ago
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The client is taking cyclobenzaprine for muscle spasms secondary to an injury to the lumbar spine that occurred while lifting a
Dima020 [189]
Cyclobenzaprine is a drug that produce an anticholinergic response in the body, which means that is blocks neurotransmitters from the nervous system to prevent things like muscle spasms. but due to the neurotransmitters being blocked, it can cause these kinds of side effects because the brain can no longer control these things.
let me know if you have any further questions
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3 0
3 years ago
Question 2 of 10
pentagon [3]
D bc active transport is basically the opposite of osmosis and diffusion
3 0
11 months ago
Why are the fields of science, technology, engineering, and math important in the modern world?
Katyanochek1 [597]

Explanation:

  1. This is 21st century .In this time our society as well as all of the world had become advanced and modern.So,in this time if we started to work without any technology then while working we need more manpower and our time will be loss.Science ,technology,engineering and maths play important role in modern world d .It helps in sustain able development and helps any country to be self dependent and makes profit by which Nations will be developed and it helps to win the future.
  2. Hope is useful for you.have a nice day.
4 0
2 years ago
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