Cell Communication Quick 10 Qs

What are the three stages of cell signaling?

• Input, output, feedback

• Reception, transduction, and response

• Initiation, progression, completion

• Inhibition, activation, termination

What are the different types of cell signaling?

• Endocrine, paracrine, and autocrine signaling

• Aerobic, anaerobic, and fermentation signaling

• Sensory, motor, and cognitive signaling

• Visual, auditory, and olfactory signaling

What are the roles of ligands and receptors in cell communication?

• Ligands repel receptors to inhibit cell communication.

• Receptors bind to ligands to initiate cell communication.

• Ligands and receptors have no role in cell communication.

• Ligands bind to receptors to initiate cell communication.

What is the difference between autocrine and paracrine signaling?

• Autocrine signaling occurs between cells in different organisms, while paracrine signaling occurs within the same organism.

• Autocrine signaling and paracrine signaling are the same thing.

• Autocrine signaling occurs when a cell responds to signaling molecules that it produces itself, while paracrine signaling occurs when a cell responds to signaling molecules produced by nearby cells.

• Autocrine signaling occurs when a cell responds to signaling molecules produced by nearby cells, while paracrine signaling occurs when a cell responds to signaling molecules that it produces itself.

Explain the concept of signal amplification in cell communication.

• Signal amplification in cell communication is the process by which a single extracellular signaling molecule can lead to a large cellular response.

• Signal amplification only occurs in plant cells, not animal cells.

• Signal amplification is a slow process that does not lead to a large cellular response.

• Signal amplification is the reduction of cellular response to extracellular signaling molecules.

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

Why do hormones not affect every cell in the body when they are released?

• All cells are affected by a hormone when it is released

• A cell needs a specific receptor for the hormone to be affected

• A cell must have the proper ATP levels to activate a cellular response

• Cells need compatible DNA for the hormone to activate transcription of a gene

cAMP is an example of a...

• secondary messenger

• ligand

• receptor protein

• target cell

Which of the following are enzymes that relay signals inside the cell by phosphorylating various molecules?

• Protein Phosphatase

• Protein Kinase

• Receptors

• Ligands

Which of the following are enzymes that shut off pathways by dephosphorylating molecules?

• Protein Phosphatase

• Protein Kinase

• Receptors

• Ligands