In the following list of events required for muscle contraction, which occurs second? Group of answer choices calcium binds troponin action potentials spread along muscle cell membrane action potentials spread along motor neuron membrane Acetylcholine is released

In what layer of the sun is energy transfers between atoms

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

The diagram below represents a chloroplast found in a typical plant cell. which of the following processes occurs inside this structure? question 8 options: a oxygen is produced b sunlight is trapped c glucose is produced d all of the above.