I thought u said renegade not retrograde-
When a muscle cell receives a signal from a motor neuron, every sarcomere within that muscle cell is activated. The signal moves from the motor neuron to the muscle cell by crossing the synapse. When acetylcholine binds the sodium enters the T tubules and this causes calcium to be released from the sarcoplamic reticulum. Calcium binds to tropomyosin, which allows actin to bind to myosin and each sarcomere contracts. There is nothing and no way to separate individual sarcomeres. They are all activated together.
D. ATP (Adenosine TRIphosphate) has one more phosphate group and is higher in energy than ADP (Adenosine DIphosphate). TRI means three, DI means two, so the names of the molecules tell you there's one more phosphate in ATP than in ADP.
That extra phosphate makes ATP higher in energy (when the cell uses that energy to do something - contract a muscle fiber, for instance - the ATP's extra energy is used and it gets converted to ADP).
Answer:
<u>Barbara must be suffering from tension headache.</u>
Explanation:
<u>Tension headaches </u>are caused due to stress, here in this case Barbara is stressed because of excess workload and low productivity. Tension headaches are a type of primary headaches and its intensity increases gradually. the pain can travel from head to neck.
(Primary headaches: These headaches are not caused as a result of any other medical problem.)
1. D, because they both produce electricity for the cell and chemical energy
2 D, ATP is the high energy output
3. D, they release the energy to plants
4. I would say B, photosynthesis is energy to convert carbon dioxide
Hope this helps
-Zayn Malik
(Sorry if this is wrong)