I would say the correct answer is B
Pimples form when *sebum*, your skin's natural oil gets trapped under the surface. It can mix with dead skin cells and form a plug called a *comedone*, or it might react with *P. acnes*, a bacterium found in hair follicles, triggering inflammation.
The (*) were to show the different systems working together to form a pimple, apologies if I was incorrect.
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Answer:
1. Electrical impulses in the heart cause the muscle to contract.
2. To keep the blood flowing in only one direction
Explanation:
In the first question, the correct answer is ''Electrical impulses in the heart cause the muscle to contract''. Every muscle in our body contracts because of electrical impulses and this is also true for our hearts. Or any hearts in nature that we know of.
In the second question, the answer is ''To keep the blood flowing in only one direction''. We have those valves and without them, we wouldn't be able to function as we do.
The two types of information that can be stored in long-term memory are explicit and implicit memories. Explicit memories are specific to facts and events, such as a your wedding or continents on a map. Implicit memories are specific to procedures and conditioned responses, such as riding a bike or feeling happy when your favorite song plays.