MATERIALS AND COMPONENTS QUIZ

Because nitric oxide breaks down quickly and thus cannot travel far

Because nitric oxide cannot cross cell membranes and enter the blood

Because other body tissues use a different signaling molecule

None of these

Its receptor is located in the cytosol of the target cell

Since it can enter the cell, it directly affects some specific cell process

It might trigger a signal cascade that causes some effect in a cell

It is a steroid

both (a) and (b)

neurotransmitters

none of these

hormones

None of these

ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively

ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively

GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively

It is in the heart muscle

It is incapable of signal transduction

It is also the site of production for the signaling molecule

It contains the receptor for the signaling molecule

receptor kinases play a key role in triggering the signal cascade

All of these

the signaling molecule binds to a surface receptor

phosphorylated proteins act with enzymes to trigger the signal cascade

bind to cell surface receptors to trigger chemical cascades

are hydrophilic and so cannot penetrate the plasma membrane

never enter the blood of humans

are made in one location of the body but have their effects some distance away

Adrenaline

Growth factors

Nitric oxide

Progesterone

target cells distant from its site of synthesis in cells of an endocrine organ

target cells close to the cell from which it was secreted

both (a) and (b)

None of these

Diacyl glycerol

Phospholipase C

Both (a) and (b)

lnositol 1,4,5-triphosphate