A) lipids and ions. B) ions, lipids, and proteins. C) proteins, lipids, and carbohydrates. D) carbohydrates, ions, and lipids. E) proteins and carbohydrates.
When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across the plasma membrane and various channel proteins close. These channels would be called
A) chemical-gated channels. B) ligand-gated channels. C) open-gated channels. D) nongated ion channels. E) voltage-gated channels.