Question

the grey antenna - shaped molecules in this image are __________ receptors found in the ________. acetylcholine; brain opioid; brain serotonin; gut nicotine; nose rewatch

Explanation:

Acetylcholine receptors are not typically described as antenna - shaped. Serotonin receptors are mainly in the gut but not usually described this way. Nicotine receptors are not mainly in the nose. Opioid receptors in the brain can have a structure that might be metaphorically described as antenna - shaped in some visual representations.

Answer:

opioid; brain