the reason why living cells cant use heat to provide the energy for their reactions is because not all living cells have heat and the heat could damage the natural qualities in proteins.
~batmans wife
The statement about cellular respiration that is not true is this: KREB'S CYCLE ACTIVITY IS DEPENDENT SOLELY ON AVAILABILITY OF SUBSTRATES; OTHERWISE IT IS UNREGULATED.
Kreb's cycle refers to the series of biochemical reactions through which humans generate energy in the presence of oxygen via the oxidation of acetyl COA.
The major factors that regulate the Krebs cycle is the concentration of ATP and NADH. The cycle is strictly controlled based on the level of energy available in the cells. The key regulatory enzymes for the cycle are isocitrate dehyrogenase and alpha ketoglutarate deydrogenase.
<span>The esophagus runs behind the windpipe (trachea) and heart</span>
Diffusion<span> in </span>cells<span>. Materials like oxygen, carbon dioxide and glucose enter and </span>leave cells by diffusion<span>. When a </span>cell<span> is respiring the concentration of oxygen and glucose inside the </span>cell<span> is lower than the surrounding blood so these </span>substances<span> move into the </span>cell<span>.
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Answer:
The pathway of oxygen from lungs to the body tissues is alveoli → red blood cells → blood vessels → tissues (option b).
Explanation:
The oxygen (O₂) required by the tissues comes from the air inspired by the respiratory system. The pathway of entry of O₂ to the body and tissues is:
- O₂ from the air reaches the lungs.
- In the pulmonary alveoli, gas exchange occurs, that is, O₂ passes into the blood capillaries and is captured by the red blood cells, while CO₂ is released and passes into the alveoli to be eliminated.
- O₂ in the red blood cells travels through the blood vessels.
- The tissues receive the O₂ and a second gaseous exchange occurs at the tissue level, as they release CO₂ that will be carried to the alveoli.
Tissue oxygenation depends on the integrity of the respiratory and circulatory systems.
<em> The other options do not show the correct order in which the oxygen travels from the alveoli to the tissues.</em>
