Intro to cell communication_Vocabulary

What do you call a reactions that use up and make energy (ex. ATP)?

• Metabolism

• Dehydration Reaction

• Cell communication

• Enzyme Catalysis

Enzymes speed up reactions by using energy called substrates.

• True

• False

Which of the following show no reaction rate in the highlighted portion of the graph?

(notice the y axis)

• 
• 
• 

What is a molecule that allows signal molecules to bind?

• Receptor

• Ligand

• Enzyme

• Substrate

Which of the following is a signal molecule? These are specific to receptors either on the surface or inside the cell.

• Receptor

• Ligand

• Enzyme

• Substrate

Cells communicate with each other all the time. What is the first step in cell signalling?

• Ligand is released

• Reception (signal molecule binds to receptor)

• Transduction (a signal pathway that can amplify and carry the original signal into the cell)

• Response (a change in cellular processes)

Distance matters in cell communication. Which of the following is how a cell signals itself?

• Direct Contact or Juxtacrine Signaling

• Paracrine Signaling

• Synaptic Signaling

• Endocrine Signaling

• Autocrine Signaling

If a ligand is a small, hydrophobic molecule, how does it signal a molecule?

• It can't get through the membrane, so will need a ligand-gated channel

• It can't get through the membrane and will bind to a receptor

• It can get through and will start making changes immediately.

• It can get through and will bind to a receptor within the cell.

All membrane channels require a ligand to open its channels.

• True

• False

Hormones travel long distances, from your brain to the organs throughout your body. What kind of signaling is this?

• Direct contact or Juxtacrine

• Autocrine Signaling

• Endocrine Signaling

• Paracrine Signaling