If a dog starts to put its paw down on a sharp stone, the tough skin skin protects underlying structures from damage. additionally, touch receptors in the skin send sensory signals to the spinal cord. the spinal cord then sends a signal to the muscles to lift the paw rather than continuing to press down. in this scenario, the dog may experience discomfort but avoid injury. what two body systems are being used to protect the structures beneath the dog's skin and signal the muscles to lift the paw?

Why do oceanic plates tend to subduction when colliding with a continental plate

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a. one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b. one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c. one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous