On which of the following surfaces of permanent teeth is pit and fissure caries MOST likely to occur? A. Facial surfaces of maxillary first molars B. Lingual surfaces of maxillary first molars C. Facial surfaces of mandibular first premolars D. Lingual surfaces of mandibular first molars E. Proximal surfaces of mandibular incisors

B

Explanation:

A pit is a tiny depression which is found on the surface of the tooth.

Fissures are the grooves that occur naturally on the biting surfaces of teeth.

Thus, pits and fissures are located on the lingual surfaces of the maximillary first molars because of the lingual fissures on the max molars.

cuz he is really really short, assuming an unorthodox and inherently unlucky configuration of elevator buttons…

explanation:

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.