Motor Unit Summation<span> - the degree of contraction of a skeletal muscle is influenced by the number of </span>motor units<span> being stimulated (with a </span>motor unit<span> being a </span>motor<span>neuron plus all of the muscle fibers it innervates; see diagram below).</span>
Penny = compound
water = element
i think
Answer:
Explanation:Sometimes memories of loss or of a lost loved one may light up the reward receptors in the brain. This means that moving on or “letting go” can be much more difficult.
