Anesthetic drugs such as Novocain block the transmission of impulses in the brain by

A) decreasing the flow of blood to the brain.
B) preventing sodium from crossing the membranes.
C) decreasing the ability of glucose to enter the brain.
D) blocking transmission at glutamate synapses.

Anesthetic Drugs

Substances used to induce anesthesia, rendering the patient insensible to pain.

Novocain

A synthetic compound used as a local anesthetic in medical and dental procedures; it is often substituted for safer and more effective anesthetics today.

Sodium

A chemical element (Na) that is essential for life, involved in osmoregulation and nerve function.