“Please!” Gus pleaded. “I need to get inside, even though it’s crowded in there!”
ATP burned one of his own phosphate groups, releasing a burst of energy. Click, whirr. The Uniporter spun, and Gus was whisked inside, moving against his natural gradient. This, ATP explained to a passing mitochondrion, was the first type of active transport: . what are the types of active transport
But then, a more complex problem arrived. A large, sad sucrose molecule named Suzy stood at the gate. She was too big for the Uniporter. Worse, she was trying to enter against her concentration gradient. ATP couldn’t carry her alone. “Please
ATP laughed. “That, my friend, is —a whole different adventure. But it still needs my energy. Everything important does.” The Uniporter spun, and Gus was whisked inside,
“I need help,” ATP admitted.
One day, a frantic glucose molecule named Gus arrived at the gate. Gus was vital for the city’s energy, but outside, there were very few of him, while inside Cytoville, there were already thousands. The laws of diffusion said he should never get in. Yet, the city was starving.
“Please!” Gus pleaded. “I need to get inside, even though it’s crowded in there!”
ATP burned one of his own phosphate groups, releasing a burst of energy. Click, whirr. The Uniporter spun, and Gus was whisked inside, moving against his natural gradient. This, ATP explained to a passing mitochondrion, was the first type of active transport: .
But then, a more complex problem arrived. A large, sad sucrose molecule named Suzy stood at the gate. She was too big for the Uniporter. Worse, she was trying to enter against her concentration gradient. ATP couldn’t carry her alone.
ATP laughed. “That, my friend, is —a whole different adventure. But it still needs my energy. Everything important does.”
“I need help,” ATP admitted.
One day, a frantic glucose molecule named Gus arrived at the gate. Gus was vital for the city’s energy, but outside, there were very few of him, while inside Cytoville, there were already thousands. The laws of diffusion said he should never get in. Yet, the city was starving.