Answer:
Active uptake (which I think you mean active transport) is important when the concentration gradient is against that of a certain substance, so it doesn't cross the membrane through diffusion or passive transport. It is sometimes necessary if a substance needs to move across a membrane but can't do so due to electrical charge or that there is a substance on the other side of the membrane preventing diffusion.
Explanation:
Which cell structure most resembles the human nervous System?
B. Endomembrane system
The endocrine system is a collection of glands that regulate your metabolism, growth, sleep, mood and other things around your body.
Answer:
it's true. that looks to be musle tissue to me
Answer:
increasing substrate concentration,
Explanation:
The reaction rate still increases with increasing substrate concentration, but levels off at a much lower rate. By increasing the enzyme concentration, the maximum reaction rate greatly increases. Conclusions: The rate of a chemical reaction increases as the substrate concentration increases.
