Regulating hormones from the hypothalamus a. first enter into the hypophyseal portal system b. travel by arteries to the pituitary c. enter the hepatic portal system, which feeds the pituitary d. enter venous circulation and travel to the heart, which pumps the hormone-containing blood to the pituitary

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b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.