Unit 0410-15% of exam7 lessons

Cell Communication & Cell Cycle

Signal transduction, feedback, mitosis, and checkpoints.

Progress

0/7 · 0%

Lessons

4.1Cell CommunicationCells communicate via direct contact, local signals, and long-distance signals to coordinate behavior.
4.2Introduction to Signal TransductionSignaling proceeds through reception, transduction, and response, with distinct receptor types tuned to different ligands.
4.3Signal TransductionTransduction relays and amplifies signals through phosphorylation cascades and second messengers before producing a cellular response.
4.4Changes in Signal Transduction PathwaysMutations or chemical interference at any step of a signaling pathway can alter or disrupt the cellular response.
4.5FeedbackNegative feedback loops maintain homeostasis while positive feedback loops amplify a process toward completion.
4.6Cell CycleThe cell cycle alternates growth phases with DNA replication and mitosis, producing two genetically identical daughter cells.
4.7Regulation of Cell CycleCheckpoints controlled by cyclins, CDKs, and tumor suppressors ensure the cell cycle proceeds only when conditions are appropriate.

Figure · reference

Cell signaling pathway: reception, transduction, response

Practice MCQs Practice FRQs Flashcards