Nerve impulse transmission

Acetylcholine is critical for transmitting messages between nerve cells.
Which piece of evidence best supports this claim?

• Acetylcholine binds to receptors on the receiving nerve cell and triggers a response.

• acetylcholine is stored inside the synaptic cleft until needed.

• Acetylcholine is released from vesicles in the bloodstream.

• Acetylcholine is made in muscle cells.

The nervous system has a system in place to avoid having too much acetylcholine in the synaptic cleft.
Which reasoning best explains why this is important?

• Acetylcholine can destroy the synaptic cleft.

• Too much acetylcholine can overstimulate the receiving nerve cell and interfere with proper communication.

• The body wants to save energy by not producing any acetylcholine.

• Extra acetylcholine could be used for digestion instead.

Acetylcholinesterase plays a vital role in nerve cell function.
Which of the following is the best evidence to support this claim?

• It replaces receptors when they are damaged

• It helps vesicles release more neurotransmitters.

• It breaks down leftover acetylcholine so it can’t keep sending messages.

• It triggers muscle movement directly.

The communication between nerve cells is precise and well-regulated.
Which reasoning best supports this claim?
A) Acetylcholine is only released when someone is asleep.
B) Messages are repeated over and over for extra strength.
C) The nervous system carefully controls both the release and removal of acetylcholine to ensure signals are accurate.
D) Vesicles store random chemicals to send mixed signals.

Answer: C

• The nervous system carefully controls both the release and removal of acetylcholine to ensure signals are accurate.

• Vesicles store random chemicals to send mixed signals.

• Acetylcholine is only released when someone is asleep.

• Messages are repeated over and over for extra strength.