Digestive System Flashcards

The digestive system is a complex network of organs and glands that work together to break down food, absorb nutrients, and eliminate waste from the body.

The esophagus is a muscular tube that connects the throat to the stomach, responsible for transporting swallowed food and liquids.

Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract.

The autonomic nervous system regulates involuntary bodily functions, including digestion, by controlling muscle contractions and secretions in the digestive tract.

The sympathetic nervous system prepares the body for 'fight or flight' responses, increasing heart rate and redirecting blood flow, which can inhibit digestion.

Norepinephrine is a neurotransmitter and hormone that plays a crucial role in the body's response to stress, increasing heart rate and blood pressure.

The parasympathetic nervous system conserves energy and promotes 'rest and digest' activities, slowing the heart rate and increasing digestive activity.

Homeostasis is the process by which biological systems maintain a stable internal environment despite changes in external conditions.

The GI tract digests food, absorbs nutrients, and expels waste, consisting of the upper and lower tracts.

The upper GI tract includes the mouth, pharynx, esophagus, stomach, and duodenum.

The small intestine is primarily responsible for the absorption of nutrients from digested food.

The large intestine absorbs water and salts from indigestible material and compacts waste for excretion.

Gut microbiota plays a role in immune function, metabolism, and overall digestive health.

Common diseases include infections, inflammation, and cancer, which can lead to symptoms like vomiting and diarrhea.

Gastroenterology is a branch of medicine focused on the digestive system and its disorders.

High-fiber diets promote healthy digestion by adding bulk to stool and preventing constipation.

High-protein diets can lead to digestive issues like constipation if excessive, particularly from animal sources.

High-fat diets can slow digestion, leading to bloating and gas, and may alter gut microbiota.

Low-carb diets may cause constipation due to reduced fiber intake but can improve symptoms of irritable bowel syndrome.

Plant-based diets are high in fiber and phytonutrients, promoting a healthy gut microbiome and regular bowel movements.

Processed food diets are often low in fiber and high in additives, leading to increased inflammation and gastrointestinal disorders.

Adequate hydration is crucial for healthy digestion as it helps dissolve nutrients and softens stool.

Diet composition significantly influences digestive health, with fiber-rich and plant-based diets generally supporting optimal function.