Cellular Communication

What evidence is there that cell communication is a process that has evolved over billions of years?

• Only cells with a nucleus are able to communicate effectively

• The processes are very similar in prokaryotic and eukaryotic cells

• Eukaryotic cells have much more advanced signaling pathways

• Prokaryotic cells are much more efficient at communicating.

Tags

NGSS.HS-LS4-1

A mutation in a cell membrane receptor would most likely have what effect on a signal transduction pathway?

• Reduce the response of the pathway

• An alternative response will be expressed

• Increase ligand binding

• Increase ligand release from the effector cell

Tags

NGSS.HS-LS1-1

This diagram shows transduction of a signal. How is the signal being transduced to its target location in the cell?

• A hormone is binding to an intracellular protein receptor

• Transport vesicles are passing neurotransmitters to neighboring cells

• Enzymes are passing phosphate groups down a series of proteins

• cAMP is formed activating a desired response

Secondary messengers that can activate or deactivate enzymes in a cell are typically part of which step of cell signaling?

• Reception

• Transduction

• Response

Why do mutations in receptor proteins affect cell signaling?

• The receptor needs the proper sequence of amino acids to interact with the cell membrane

• The receptor needs a specific shape to bind to it's ligand

• The receptor must have the right polarity to interact with it's ligand

• All of the above

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

What do second messengers do?

• transport a signal through the lipid bilayer

• relay a signal from the outside to the inside of the cell

• relay message from the inside of the mebrane throughout the cytoplasm

• dampen the message

An example of DIRECT cell communication is:

• White blood cells bumping into each other sharing antigen info

• Neurons communicating across a synapse

• Hormones traveling through the blood stream to target tissues

Long distance signals involving hormones are ________ signals.

• paracrine

• synaptic

• endocrine

An example of LOCAL cell communication is:

• White blood cells bumping into each other sharing antigen info

• Neurons communicating across a synapse

• Hormones traveling through the blood stream to target tissues

Do plant cells communicate using hormones?

• yes

• no