Drugs that create feelings of calmness, reduce muscle tension, and lower sympathetic activity in the brain are called

Drugs that create feelings of calmness, reduce muscle tension, and lower sympathetic activity in the brain are called Anti anxiety Drugs.

Explanation:

Anti anxiety Drugs:- These drugs are also known as anxiolyticor minor tranquilizer. These drugs are classified as any category of drugs that reduces the symptoms of  or Anxiety. Anxiety is a  state of pervasive apprehension or fear of missing out that may be activated by specific environmental or personal factors.

A person with anxiety may suffer several symptoms like  palpitations, nausea, dizziness, headaches, and chest pains, sleeplessness and fatigue. When these conditions aresevere and not normal that person is advised to take care with both medication and psychotherapy.

"a scientist studying a whale and its surroundings would need to understand the structure of atoms in case something was negatively affecting the whale or its surroundings."

explanation:

this was from the link provided:

this protocol describes a detailed procedure for intracellular flow cytometry staining.