A fixed action pattern is a behavior that is carried out to completion once started, regardless of changes in the original stimulus and the sequence is unchangeable. The unlearned behavior of fixed action patterns are triggered by a type of external stimulus that start off a particular organism.
Alcohol is a central nervous system depressant that produces a false feeling of well-being and efficiency and results in slower reaction time to stimulation. Alcohol influences the brain activity and consciousness by hindering the flow of messages from nerve receptors to the brain. This thereby changes one’s perceptions, emotions, and senses.
A serious, inflammatory condition in which the colon mucosa protrudes through the colon wall is called diverticulitis. Diverticulitis is a related digestive condition that affects the colon. This condition occurs when naturally weak part of the colon tears which result in inflammation or infection. Symptoms of diverticulitis include severe abdominal pain, fever, nausea and constipation.
B. smooth endoplasmic reticulum
The smooth endoplasmic reticulum (SER) is a member of the endomembrane system. It is present in eukaryotic cells. SER is made of tubular structures called cisternae. It does not contain ribosomes. So, it does not associated with protein synthesis. Its primary function is to make lipids, steroid hormones and detoxification of the metabolic by-products which are harmful. The fats or lipids synthesised by SER helps in membrane biogenesis.