Discuss sensory receptor input to the CNS Flashcards
Central Nervous System (2)
Brain and Spinal Cord
Peripheral Nervous System (2)
Motor Neurons and Sensory Neurons
Motor Neurons (2)
CNS to muscles and glands
Somatic and Autonomic Nervous System
Autonomic (2)
Involuntary responses - sympathetic or parasympathetic
Functions of the Nervous System (5)
Stimuli Sensory input Integration (brain and spinal cord) Motor output Effector (muscles)
Sensory receptors (explained)
Stimuli stimulates sensory receptors to generate an action potential which is sent to the parietal lobe to be integrated
Integration (explained - 3)
Action potential received within parietal lobe
Detects which stimuli caused action potential
Bases decision on prior knowledge and experienced stored.
Motor output (explained - 3)
Motor neurons reach muscles/glands, muscles or gland contracts, causing bones to move, causing body part to move
Effectors - 3 muscles 2 glands
Skeletal muscle Smooth muscle Cardiac muscle Endocrine gland Exocrine gland
Sensory receptor function (2)
Responds to changes in environment
Responds to stimuli
3 different type of stimulus
Chemical
Pressure
Light
Mechanoreceptors
Respond to mechanical forces; touch, pressure, vibration etc
Thermoreceptors
Respond to temperature changes
Photoreceptors
Respond to light
Found on the retina
Chemoreceptors
Respond to chemical changes (taste or smell)
Nocireceptors
Respond to damaging stimuli that result in pain
Exteroceptors
Detect stimuli coming from the external environment
Visceroceptors
Detect chemical changes, tissue stretch and temperature located on visceral organs
Proprioceptors
Within skeletal muscles, tendons, joints, ligaments, connective tissue etc
Muscle spindles (3)
Found in skeletal muscle, detects muscle stretch and initiates a reflex that resists the stretch
Tendon organs (3)
Bundle of tendon fibres that prevent the stretching of tendon by initiation the relaxation of a muscle
Joint receptor (3)
Monitor the stretch or the synovial joint provides information of joint position and movement
Hearing receptor (2)
Hair cells, found within the cochlea in the ear
Multipolar
Sensory neuron
Bipolar
Effector neuron
Unipolar
Motor neuron