객관식
Which of the following best describes peristalsis?
255
views
10. Cell Signaling
Introduction to Cell Signaling
객관식
Signal transduction pathways:
A
Are necessary for signals to cross the membrane.
B
Include the intracellular events caused by a signal binding to a receptor.
C
Include the extracellular events caused by a signal binding to a receptor.
D
Carry a signaling molecule to the nucleus of a cell.
검증된 단계별 안내1
Understand the concept of signal transduction pathways: These are processes by which a cell converts an extracellular signal into a response. They involve a series of molecular events, typically including the activation of proteins by phosphorylation.
Identify the role of receptors: Signal transduction begins when a signaling molecule binds to a receptor on the cell surface. This binding triggers intracellular events, leading to a cellular response.
Distinguish between intracellular and extracellular events: Signal transduction pathways primarily focus on intracellular events, which occur inside the cell after the signal binds to the receptor. Extracellular events are related to the initial binding of the signal to the receptor.
Clarify the misconception about signal molecules traveling to the nucleus: While signal transduction can lead to changes in gene expression, the signaling molecule itself does not typically travel to the nucleus. Instead, the pathway activates transcription factors that enter the nucleus.
Summarize the correct understanding: Signal transduction pathways include the intracellular events caused by a signal binding to a receptor, leading to a specific cellular response, often involving changes in gene expression.
관련 영상
관련 실천
