Cell Communication warm up

Why is cell communication important?

• It helps in the digestion of food.

• It helps coordinate cell activities and enable specific environmental responses.

• It is necessary for cell division.

• It provides energy to cells.

What are the four main steps of cell communication?

• Stimulus, signal reception, signal transduction, response

• Signal production, signal release, signal reception, signal degradation

• Signal detection, signal amplification, signal response, signal termination

• Stimulus, release of signal, signal reception, response

What is a ligand in the context of cell signaling?

• A type of receptor protein on the target cell.

• A type of signal molecule that must have the correct shape to bind with a receptor protein.

• A type of enzyme that breaks down signal molecules.

• A type of cell that sends out signaling molecules.

What is quorum sensing?

• A process where cells divide rapidly in response to a signal.

• A type of cell communication that occurs among bacteria when there is a high population density.

• A method by which cells determine the size of their environment.

• A signaling pathway used by eukaryotic cells to respond to stress.

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What occurs in the body when you get scared, in terms of cell signaling?

• The nervous system releases signaling molecules called adrenaline from the adrenal glands.

• The body shuts down non-essential systems to conserve energy.

• The muscles contract involuntarily, causing shaking.

• The brain sends a signal to increase cognitive awareness.

When a signal is sent to a target cell, what change in its receptor protein must occur to make it active?

• Its shape must change.

• It must detach from the cell membrane.

• It must replicate itself.

• It must stop receiving signals.

If the shape of a ligand becomes improper, what will happen to the transduction pathway?

• It does not activate because the ligand cannot bind with the receptor protein

• It activates more strongly than with a proper shaped ligand

• It causes the receptor to degrade

• It has no effect on the transduction pathway

Why is it important that the cells can reverse (uncouple) their signal?

• To amplify the signal for a stronger response

• To prevent depletion of cellular resources

• To prevent signals from causing irreversible damage

• To allow the signal to spread to other cells

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When adrenaline binds to a receptor, what biological effects does it cause?

• Heart rate decrease, airways constrict

• Heart rate increase, airways widen

• Digestion improves, muscle strength decreases

• Blood pressure decreases, sleepiness increases

In simple terms, what is the function of insulin?

• It is a ligand that regulates glucose levels in the bloodstream

• It is a hormone that increases blood glucose levels

• It is an enzyme that breaks down glucose

• It is a receptor that detects sugar levels