Which of These Statements Correctly Describes Active Immunity

question 9

Multiple Choice

Which of these statements correctly describes active immunity?

• A)It is self-generated upon exposure to antigen.
• B)It can be produced only as a result of a person actually having the disease.
• C) It involves administration of preformed antibodies.
• D) It is acquired in the newborn as a result of the transfer of antibodies across the placenta during intrauterine development.

---

Definitions:

Phosphorylation

The addition of a phosphate group to a molecule, a crucial process in biology that modulates the function of proteins and other molecules in cells.

Excitatory Postsynaptic Potential

A temporary increase in postsynaptic membrane potential due to the flow of positively charged ions into the postsynaptic cell, making it more likely to fire an action potential.

Depolarization

The reduction in the electrical charge difference across a cell's plasma membrane, leading to the initiation of an action potential.

Resting Potential

The electrical charge difference across the cell membrane while a neuron is at rest, typically around -70mV, enabling the potential for action potentials.