An action potential begins when voltage-gated channels allow ions to rush into the neuron. the influx of these ions then cause for the opening of another set of voltage-gated channels that allow ions to rush out of the neuron.

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: