Questions $6-8.$ True$-$False.

a$.$ true

b$.$ false

$6.$ All hormone receptors are on the surface of cell membranes.

$7.$ The same hormone can have a different action on a target cell depending upon the type of receptor molecule the hormone binds to$.$

$8.$ ipid$-$soluble hormones bind primarily to receptors on cell surfaces.

Questions $9-15.$ Matching. You can use an answer once, more$-$than$-$once, or not at all$-$your decision.

$9.$ Target cells are near cell secreting local regulators

a$.$ endocrine signaling hormones

$10.$ Secreted local regulators act on the secreting cell

b$.$ neuroendocrine signaling

$11.$ Neurotransmitters are involved in

c$.$ local regulators

$12.$ Hormones secreted into extracellular fluid then

d$.$ paracrine signaling diffuse into the bloodstream or hemolymph

$13.q,$ Molecules that reach target cells only by diffusion over short distances

e$.$ autocrine signaling

$14.q,$ Chemicals released into the external environment

ab$.$ synaptic signaling

$15.q,$ Neurohormones from neurosecretory cells diffuse

ac$.$ pheromones into bloodstream and often regulate endocrine signaling

ad$.$ none of the above

Answer all