Question

question 2
2 pts
the myelin sheath is formed by oligodendrocytes in the peripheral nervous system and schwann cells in the central nervous system.
true
false

question 3
2 pts
which type of ion channel opens in response to a change in membrane potential and is responsible for generating action potentials?
mechanically - gated channel
ligand - gated channel
voltage - gated channel
leak channel
chemically - gated channel

Explanation:

• Question 2: In the peripheral nervous system, Schwann cells form the myelin sheath. In the central nervous system, oligodendrocytes form the myelin sheath. So the statement in Question 2 is incorrect.
• Question 3: Voltage - gated channels open in response to a change in membrane potential and are crucial for generating action potentials. Mechanically - gated channels respond to physical deformation. Ligand - gated (chemically - gated) channels respond to chemical ligands. Leak channels are responsible for the passive movement of ions across the membrane.

Answer:

• Question 2: B. False
• Question 3: C. Voltage - gated channel