Cell Signalling and Transduction
When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .

signaling molecule; target cell; G proteins
kinase; receptor; proteases
signaling molecule; receptor; G proteins
signaling molecule; target cell; receptors

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
Cell signaling can be classified into

three distinct types based on the signaling molecules
three distinct types based on the distance over which the signaling molecules act
two distinct types based on the distance over which the signaling molecules act
None of these

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
The signaling molecules called steroid hormones

are made in one location of the body but have their effects some distance away
are hydrophilic and so cannot penetrate the plasma membrane
bind to cell surface receptors to trigger chemical cascades
never enter the blood of humans

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it

breaks down into nitric oxide, which increases blood flow to the heart
mimics the action of signal receptors
interferes with chemical cascades that trigger contraction of heart muscle
is broken down into hormones that affect the heart

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
cAMP and cGMP are derived from

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
None of these

ANSWER DOWNLOAD EXAMIANS APP