<span>This is called an epidural. A procedure that delivers continuous pain relief to the lower part of your body while allowing women to remain fully awake. It decreases sensation of pain. The medication is inserted into the epidural space just outside the spinal cord and spinal fluid. This is the most common method used in the United States.</span>
Answer and Explanation:
The steps of the sliding filament theory are:
Muscle activation: breakdown of energy (ATP) by myosin.
Before contraction begins, myosin is only associated with a molecule of energy (ATP), which myosin breaks down into its component molecules (ADP + P) causing myosin to change shape.
Muscle contraction: cross-bridge formation
The shape change allows myosin to bind an adjacent actin, creating a cross-bridge.
Recharging: power (pulling) stroke
The cross-bridge formation causes myosin to release ADP+P, change shape, and to pull (slide) actin closer to the center of the myosin molecule.
Relaxaction: cross-bridge detachment
The completion of the pulling stroke further changes the shape of myosin. This allows myosin and ATP to bind, which causes myosin to release actin, destroying the cross-bridge. The cycle is now ready to begin again.
The repeated cycling through these steps generates force (i.e., step 2: cross-bridge formation) and changes in muscle length (i.e., step 3: power stroke), which are necessary to muscle contraction.
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Answer:
Compare mitochondria to the digestive system. The cytoskeleton is similar to the skeletal and muscular system. They both provide structure and allows for movement within the cell. The cell membrane is similar to the integumentary system. They both separate and protects the internal structures from the external environment and it regulates water loss.
Explanation:
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