During which step of signal transduction is a second...

During which step of signal transduction is a second messenger released into the cytoplasm?
$$\begin{array}{ll}{\text { a. reception }} & {\text { c. transduction }} \\ {\text { b. response }} & {\text { d. final step }}\end{array}$$

Key Concepts

Second Messengers

Second messengers are small intracellular molecules that propagate and amplify the signal initiated by the binding of a ligand to a receptor. They are released inside the cell during the transduction step and help relay the signal to various target proteins, leading to a coordinated cellular response.

Transduction Step

The transduction step in signal transduction is the phase during which the signal is relayed and amplified within the cell. It is during this step that second messengers are released into the cytoplasm, triggering a series of intracellular events that lead to the final cellular response.

Signal Transduction

Signal transduction is the process by which a cell converts an extracellular signal into a functional response. This process involves a cascade of molecular events that begin with the detection of the signal at the cell surface and end with a specific cellular response, ensuring that the cell appropriately reacts to its environment.

Transcript

00:01 Hi everyone.

00:02 So for this question, we are going to want to think about a signal transduction pathway.

00:08 And a signal transduction pathway is just another name for a cell signaling pathway.

00:14 So in order to figure out which step of signal transduction, a second messenger is released into the cytoplasm, let's think about the general steps of a signal transduction pathway.

00:26 So there are three or more basic steps to the pathway, depending on how much you choose to break it up.

00:33 But there are definitely at least three main umbrellas you need to understand.

00:36 There are three main steps.

00:38 So i kind of drew a little diagram over here so we can see and you can follow along.

00:44 So this is a cell.

00:45 So right here, this black line, that's our plasma membrane.

00:49 Then to the left, we have our extracellular matrix.

00:52 That's what ecm stands for.

00:53 Then on the inside of the cell we have our cytoplasm.

00:58 So let's start.

00:59 First, we have three main steps, as i said.

01:01 We have reception, transduction, and response.

01:05 So first, reception is one of our cell detects a signaling molecule that's outside of the cell.

01:13 So how is this done? a chemical signal, also known as a ligand.

01:19 Oops.

01:20 So this is my little ligand here.

01:22 It's a chemical signal that's outside of the cell.

01:25 The cell, it will bind to a receptor protein.

01:28 And my receptor protein right over here is this red little thing of a jig...

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