Chapter 8 Excitable Cells (Cody Mon Exam Review)

Excitable cells ____________________.

• are found in all tissue types

• only send messages to other cells

• have no nucleus

• can generate an action potential in response to a graded potential

• are also known as astrocytes

the movement of ions and other solutes across the cell membrane using energy

• voltage-gated ion channel

• ligand-gated ion channel

• passive transport

• active transport

• anion

Question 3: a negatively charged ion

• passive transport

• active transport

• anion

• ligand-gated ion channel

• voltage-gated ion channel

gated by a chemical messenger on the inside or outside of the cell

• ligand-gated ion channel

• voltage-gated ion channel

• passive transport

• active transport

• anion

the movement of ions and other solutes across the cell membrane without energy input

• voltage-gated ion channel

• ligand-gated ion channel

• passive transport

gated by a change in the charge of their surrounding environment inside the cell

• voltage-gated ion channel

• active transport

• ligand-gated ion channel

• passive transport

• anion

a positively charged ion

• passive transport

• ligand-gated ion channel

• voltage-gated ion channel

• cation

• active transport

Which of the following conditions triggers the opening or closing of voltage-gated ion channels in a cell?

• Binding with a chemical messenger

• Interacting with a neurotransmitter or hormone

• Changes in the relative distribution of charges

• Binding with amino acid residues

Which of the following best describes the mechanism by which ligand-gated ion channels operate?

• They are gated by a chemical messenger that binds to the channel on the inside or outside of the cell.

• They operate based on the relative distribution of charges in their local environment.

• They respond only to changes in conformation caused by charged amino acid residues.

What is the ability of a cell to send and receive electrical signals across the plasma membrane called?

• Excitability

• Conductivity

• Permeability

• Reactivity