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.
This would be a semi-permeable membrane :) Just learned that in Biology
Answer:
I think this is what you're looking for?
Explanation:
<span>You know that humans are closely related to chimpanzees because the Linnaean Taxonomy focuses on morphology and anatomy through a hierarchy of increasing general categories.</span>
Answer:
The given blank can be filled with thymus.
Explanation:
The secondary branch of immunological tolerance known as the peripheral tolerance occurs in the immune periphery, that is, post the maturation and exit of the B and the T cells from the primary lymphoid organs like thymus. The main objective of the mechanism is to make sure that the self-destructive B and T cells that managed to pass through central tolerance do not result in autoimmune disease.