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Alexandra [31]
3 years ago
9

The _1__ is a specialized smooth ER only found in muscle cells. It is really important

Health
1 answer:
Sidana [21]3 years ago
6 0

Answer:

1- sarcoplasmic reticulum

Explanation:

2- electrical current

3-calcium

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Explanation:

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The core area is the centre of gravity and stability for all bodily movements.

Strength of core muscles is very important especially to athletes and sports persons. Weakness of core muscles leads to general body weakness and fatigue, muscle injuries like sprains, less endurance and power, back pain, and poor posture.  

Core strengthening exercises are done to train the core muscles and strengthen them and work in harmony for better body balance, stability, and movement. Core strengthening exercises include crunches, plank, L-sit, sit-ups, push-ups etc

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