Nervous System Functions/Components
Homeostasis is defined as?
The ability of an organism or cell to maintain internal equilibrium by adjusting its physiological processes
What areas comprise the CNS?
What are the levels of respiration?
Pulmonary ventilation, pulmonary diffusion, gas transport, and capillary gas exchange
What does the cardiovascular system consist of?
Purpose of feedback systems?
Used in operational communication between nervous system and organ systems
What areas comprise the PNS?
All other nerves and ganglia
Movement of air pathway?
Nose/nostrils, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli
The two main types of circulation in the cardiovascular system and their purposes?
Systemic circulation and pulmonary circulation. Systemic allows oxygenated blood and nutrients to reach the rest of the body, and pulmonary allows for oxygenation of the blood
Components of a Neuron?
Dendrites, Cell Body, and Axons
Functions of the Sympathetic Nervous System?
"Fight or Flight"
Stimulates systems related to survival and stress. When stimulated it increases: heart rate and blood pressure, adds more blood flow to skeletal muscles, liver releases glucose into blood stream, and glycogen is broken down into muscles for energy
Main functions of the respiratory system?
Conducting air in and out of lungs, exchanging gases between air and blood, humidifying air, warming air, and filtering air
Main purpose of the cardiovascular system?
To provide adequate circulation of blood throughout the body
Function of negative feedback loop?
Diminishes intensity of process to return to initial status quo
Functions of the parasympathetic nervous system?
"Rest and Digest"
Helps body to maintain or resume normal resting function. When stimulated: blood pressure is lowered, heart rate is slowed, pupils are constricted, blood flow increased to skin and viscera, and maintains peristalsis, saliva, and normal bladder function
What happens when the volume of the intrathoracic cavity increases?
How many chambers reside within the heart?
4 Chambers: Right atrium, right ventricle, left atrium, left ventricle
Which cells comprise 90% of all cells in the central nervous system?
Glial Cells
What two major nervous system divisions reside within the Peripheral Nervous System?
The Autonomic Nervous System and Sensory Somatic Nervous System
What is the most important inspiratory muscle?
The Diaphragm
What is the first part of the conduction system within the heart?
The Sinoatrial Node