For Muscles to work, they need a stimulus from a ____________ nerve and a source of energy that is ___________, is also known as __________.
For muscles to work, they need a stimulus from a motor nerve and a source of energy that is adenosine triphosphate, also known as ATP
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For muscles to work, they need a stimulus from a MOTOR nerve and a source of energy that is ATP (adenosine triphosphate), which is also known as the "energy currency" of the body.
Explanation:
To understand how muscles work, we need to break it down into two main components: the nerve stimulus and the energy source.
1. Nerve stimulus: Muscles are controlled by the nervous system. To initiate muscle contraction, a specific type of nerve called the "motor nerve" delivers a signal from the brain or spinal cord to the muscle fibers. This signal triggers a series of events that ultimately leads to muscle contraction. So, the stimulus for muscles to work is the signal transmitted by motor nerves.
2. Energy source: Muscles require energy to contract and exert force. The primary source of energy for muscle contraction is adenosine triphosphate (ATP). ATP is a molecule found within cells that stores and releases energy as needed. When the muscle needs to contract, ATP is broken down into adenosine diphosphate (ADP) and inorganic phosphate (Pi), releasing energy in the process. This energy powers the muscle contraction, allowing it to generate force and perform its function. Thus, ATP serves as the energy source for muscles.
Overall, for muscles to work effectively, they need a stimulus from a motor nerve to initiate the contraction process, and they require ATP as the energy source to fuel muscle contraction.