The spermatic cord contains the: a. vas deferens. b. seminal vesicles. c. prostate gland. d. Cowper's glands.

 a. vas deferens

Explanation:

The spermatic cord refers to the cord or tube which is supplied with the collection of the nerves, ducts and vessels that run to the testes or from the testes. These are surrounded by the fascia.

The spermatic cord contains the testicular artery, plexus veins and vas deferens. The other structures of the cord includes the cremasteric artery, sympathetic nerves and lymphatic supply from the epididymis and testis.

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.