The skeletal muscles work in pairs always
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Answer:
Plate Boundaries
Explanation:
Puerto Rico might be on a plate boundary. When two plates slide against each other (also called a transform boundary) they can cause a earthquake to happen on the surface.
Jeremy is sitting quietly when the muscles in his left leg begin to “twitch.” This activation of movement in his voluntary muscles is most likely due to the release of the neurotransmitter Acetylcholine .
The primary function of acetylcholine is to carry signals from motor neurons to the body's skeletal muscles.
Answer:
In order to perceive a stimulus, that stimulus has to meet or exceed the absolute threshold; in order to detect a change in that stimulus, the stimulus has to meet or exceed the differential threshold.
Explanation:
The absolute threshold is the minimum intensity of energy that is required to cause a sensation in a person, that is, the minimum or maximum maginitude that a stimulus must have in order to be captured. The absolute threshold defines our perceptual limits and varies depending on the individual. The differential threshold (Just Noticeable Difference, JND) refers to the minimum intensity at which a stimulus must be increased so that we notice a change in that stimulus, that is, it's the increase that is necessary in the intensity of the stimulus so that the person perceives a modification of the same.
Weber's law states that the stronger the initial stimulus, the greater is the additional intensity necessary for the second stimulus to be perceived as different.
