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.
herd. cutting horse - One trained to cut cattle out of a herd. pointer, point man - A pointer or point man was first a cowboy riding at the front of a herd of cattle. egregious - First meant remarkably good and standing out or apart from the flock or herd; eminent; its later derogatory sense is probably an ironical use.