Question

"The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted."

Name the chemical substances referred here.

• A. Acetylcholine
• B. Dopamine
• C. Glycogen
• D. Cerebrospinal fluid

Answer 1

Answer: (A), (B)

The correct options are
A

Acetylcholine

B

Dopamine

Acetylcholine and dopamine are the chemicals described here. They are neurotransmitters which when released into the synaptic cleft stimulates the nearby dendrites and new electric impulses are formed for transmission. These impulses travel through the axons and reach the synaptic knob and the process continues. Glycogen is a form of glucose that serves as a form of energy storage in humans. Cerebrospinal fluid is a colourless fluid that protects the brain and spinal cord from damage.