Sources of hormones in humans = the endocrine system [Fig. 37.2] 3. Target cells = cells with receptors for a given chemical messenger that can alter their activities in response to messenger.- Hormones are transported throughout the body by the blood, but they only elicit responses in target cells.. Do not diffuse into cells. b. Target cells have specific receptor for hormone on cell surface. c. Hormone binds to receptor and causes a second messenger to be released within the cell.
Definition of herder. : one that herds; specifically : a person who manages, breeds, or tends to livestock : herdsman 1.
These 10 facts about space will blow your mind. Herd mentality is a phenomenon wherein individual members of a crowd subvert their will to the perceived unified will of the mass. In biology, herd mentality is most clearly seen through animal packs that travel, feed, and hunt together. Outliers are often either left behind or targeted by predators.