When Otto Loewi Collected the Fluid from Synapses That Were

question 139

Multiple Choice

When Otto Loewi collected the fluid from synapses that were involved in slowing a frog's heart, then injected it near the heart of a second frog, he demonstrated that

• A) neurotransmitters which are inhibitory can also be excitatory.
• B) at least some neurons communicate by releasing chemicals.
• C) neurons do NOT communicate by releasing chemicals.
• D) communication between a neuron and a muscle is very different than that between two neurons.

---

Definitions:

Confidence Level

A measure of how likely it is that a statistical estimate is correct, often expressed as a percentage indicating how confident one can be in the result.

Glutamic Acid

An amino acid used by the body to build proteins, also functioning as a neurotransmitter in the brain.

Aspartic Acid

Aspartic acid is a nonessential amino acid used in the biosynthesis of proteins, playing roles in the body's metabolic processes and neurotransmission.

MSG

Monosodium glutamate, a flavor enhancer commonly used in food preparation and processed foods.