Which of the following responses is mediated by intermediate proteins and second messengers?
A) An electrical signal is generated when a mechanoreceptor is distorted by water movement.
B) The rate of synthesis of a particular protein is increased when a hormone/receptor complex binds to a specific region of DNA.
C) Ion channels on the plasma membrane of a photoreceptor are closed after the absorption of a photon of light.
D) Water soluble ligands interact with receptors to open an ion channel and cause membrane depolarisation.
E) All of the answers are correct.

Question

Quizplus · Accepted Answer

The closing of ion channels in photoreceptors after photon absorption involves a cascade of intermediate proteins and second messengers, such as the activation of transducin and the reduction of cGMP levels.

Which of the Following Responses Is Mediated by Intermediate Proteins