Heat is to summer as cold is to?​

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

Which of these resources is used worldwide to make construction products, pottery, and porcelain