The Sum Total of All the Microbes in a Certain

question 27

Multiple Choice

The sum total of all the microbes in a certain environment is termed the ______.

• A)microbiome
• B)microbial niche
• C)domain
• D)biofilm
• E)phylogeny

---

Definitions:

Acetylcholine

A neurotransmitter in the nervous system that plays an important role in muscle contraction and cognitive functions.

Agonist

is a substance that binds to a receptor and triggers a response in the body, often mimicking the action of a naturally occurring substance.

Excitatory Neurotransmitter

Chemical substances in the nervous system that increase the likelihood of firing the neuron to which they bind, promoting neural activity.

Limbic System

A complex set of brain structures located on both sides of the thalamus, immediately beneath the cerebrum, involved in various functions including emotions, behavior, and long-term memory.