Topic 4.2 - Introduction to Signal Transduction

What type of transmembrane receptor is being shown?

•  tyrosine kinase receptor
• G-protein receptor
• gated ion channel

The 3 steps of signal transduction in order are

• reception, transduction, response
• response, transduction, reception
• reception, response, transduction
• transduction, reception, response

What type of transmembrane receptor is being shown?

• G-protein receptor
• tyrosine kinase receptor
• gated ion channel

What type of transmembrane receptor is being shown?

• gated ion channel
• G-protein receptor
• tyrosine kinase receptor

Which of the following correctly describes the reception stage of this signal transduction pathway?

• epinephrine binds to a g-protein coupled receptor protein present in the cell membrane
• the g protein changes shape, is activated, activates adenyl cyclase, which activates cAMP, which activates protein kinases
• protein kinases phosphoylate molecules
• glycogen synthesis is inhibited and glycogen breakdown is promoted

A signal molecule that binds to a plasma-membrane protein is a

• ligand
• second messenger
• protein kinase
• receptor protein

What does a protein kinase do?

• removes phosphates
• transfers phosphates from ATP to proteins
• activates an enzyme

Which term refers to cells signaling to themselves?

• Paracrine

• Autocrine

• Endocrine

• Somatricine

The binding of a ligand to a receptor is involved in what stage of cell communication?

• response

• transduction

• inhibition

• reception

A series of chemical reactions that relay chemical message inside the cell; may amplify the signal

• reception

• transduction

• response

• activation