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

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

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

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

breaks down into nitric oxide, which increases blood flow to the heart

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Cell Signalling and Transduction
Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?

None of these

Because nitric oxide breaks down quickly and thus cannot travel far

Because other body tissues use a different signaling molecule

Because nitric oxide cannot cross cell membranes and enter the blood

None of these

Because nitric oxide breaks down quickly and thus cannot travel far

Because other body tissues use a different signaling molecule

Because nitric oxide cannot cross cell membranes and enter the blood

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Cell Signalling and Transduction
Which of the following statements about G proteins is false?

They must be active before the cell can make needed cAMP

They bind to and are regulated by guanine nucleotides

They are involved in signal cascades

They become activated when bound to GDP

They must be active before the cell can make needed cAMP

They bind to and are regulated by guanine nucleotides

They are involved in signal cascades

They become activated when bound to GDP

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Cell Signalling and Transduction
In paracrine signaling, the signaling molecules affects only

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

both (a) and (b)

None of these

target cells close to the cell from which it was secreted

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

both (a) and (b)

None of these

target cells close to the cell from which it was secreted

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Cell Signalling and Transduction
Small charged molecules, often biogenic amines function as

neurotransmitters

hormones

none of these

both (a) and (b)

neurotransmitters

hormones

none of these

both (a) and (b)

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Cell Signalling and Transduction
The binding of ligands to many G-proteins linked receptors leads to shortlived

decrease in the concentration of certain intracellular signaling molecules called second messenger

increase in the concentration of certain intracellular signaling molecules called second messenger

decrease in the concentration of certain extracellular signaling molecules called first messenger

increase in the concentration of certain extracellular signaling molecules called first messenger

decrease in the concentration of certain intracellular signaling molecules called second messenger

increase in the concentration of certain intracellular signaling molecules called second messenger

decrease in the concentration of certain extracellular signaling molecules called first messenger

increase in the concentration of certain extracellular signaling molecules called first messenger

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Cell Signalling and Transduction

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

Cell Signalling and Transduction Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?

Cell Signalling and Transduction Which of the following statements about G proteins is false?

Cell Signalling and Transduction In paracrine signaling, the signaling molecules affects only

Cell Signalling and Transduction Small charged molecules, often biogenic amines function as

Cell Signalling and Transduction The binding of ligands to many G-proteins linked receptors leads to shortlived

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

Cell Signalling and Transduction
Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?

Cell Signalling and Transduction
Which of the following statements about G proteins is false?

Cell Signalling and Transduction
In paracrine signaling, the signaling molecules affects only

Cell Signalling and Transduction
Small charged molecules, often biogenic amines function as

Cell Signalling and Transduction
The binding of ligands to many G-proteins linked receptors leads to shortlived