Domain 1: Basic and Applied Sciences 17% Flashcards
Nervous System
Communication network of the body composed of two divisions: CNS and PNS
Consist of the brain and the spinal cord, and its primary function is to control and interpret information.
Central Nervous System (CNS)
Consist of nerves that connect the CNS to the rest of the body. Senses the environment and tells the body how to respond based on signals from the CNS.
Peripheral Nervous System (PNS)
The PNS serves two main functions
- Provide connection for the nervous system to activate effector (organ, muscle) sites. 2. Relay information from effort site back to the brain via sensory receptors
The PNS consist of the somatic and autonomic nervous system. What is somatic?
Responsible for the voluntary control of movement such as movement of the biceps and legs
The PNS consist of the somatic and autonomic nervous system. What is autonomic?
Providers neural input to involuntary systems such as the heart and digestion
What are the 3 Functions of the Nervous System?
Autonomic is divided into sympathetic and prasympathetic nervous systems. What does each do?
Sympathetic System- increases activation to prep for activity
Parasympathetic System- decreases activation during rest and recovery
Functional unit of the nervous system
Neuron
Transmits nerve impulses from CNS to effector sites
Motor (efferent) neurons
Respond to stimuli; transmit nerve impulses from effector sites to CNS
Sensory (afferent) neurons
Mechanoreceptors
- Sense mechanical information or body distortions such as: touch, pressure, stetching and motion
- Sends info to CNS
- CNS processes
- CNS sends info back to muscles to act
Which sensory receptor will sense a muscle being stretched or lengthened?
Muscle Spindles
Which sensory receptor senses causes the muscle to relax during muscle tension and prevents the muscle from excessive stress or injury?
Gogle Tendon Organ (GTOs)
Joint Receptor
Responds to pressure, acceleration and decleration of the joints