Transport of O2, CO₂ and the Digestive System

These flashcards cover key vocabulary and concepts related to the transport of gases in the blood and the functions of the digestive system.

Oxyhemoglobin

Hemoglobin bound to oxygen, accounting for 98.5% of oxygen transport in the blood.

Affinities of Hemoglobin

The relationship between oxygen concentration and hemoglobin; high concentration increases affinity, while low concentration decreases it.

Carbonic Acid

H2CO3, a form of carbon dioxide transport in blood, making up 70% of CO₂ transport.

Carbaminohemoglobin

Hemoglobin bound to carbon dioxide, accounting for 23% of CO₂ transport.

Pontine Respiratory Centers

Nervous system centers located in the pons that influence the rate and depth of respiration.

Chemoreceptors

Sensory receptors that monitor CO₂ and O₂ levels in the blood and influence ventilation rate.

Mucosa

The innermost layer of the digestive tract, consisting of a mucous membrane.

Peristalsis

Involuntary muscle movements that push ingested material through the digestive tract.

Gastric Activity

The processes regulated by hormones including gastrin and somatostatin, affecting digestion in the stomach.

Absorptive Cells

Cells in the small intestine that facilitate chemical digestion and nutrient absorption.

Secretin

A hormone secreted by intestinal enteroendocrine cells that inhibit gastric activity.

Cholecystokinin

A hormone that stimulates secretions from the liver, gallbladder, and pancreas.