LAB 7

• sensory neurons detect change and send information to the CNS to be processed. Motor neurons send information to effectors to produce a response appropriate to the situation
• Reflexes are a type of stimulus response reaction
• Learned reflexes result from repetition. Ex is driving a car; with practice, the activity becomes mostly automatic and subconscious
• Inborn reflex is a rapid, predictable, involuntary, and unlearned motor response to a stimulus s that is a part of all neural pathways. They are below consciousness. Ex is breathing

  Sometimes the response can be generated prior to perceiving pain
• Five parts of all reflexes are: receptor that sense the stimulus and vitiates the signals, sensory neuron that carries afferent nerve impulse to the CNS, an integration center where the signal is processed, and in a monosyntaptic reflex a single synapse between the motor and sensory neuron serves as the integration center.
• In a polysynaptic reflex, there are a few neurons.
• The integration center for most reflexes is in the CNS.
• The motor neuron that carries efferent signals to the effector from the integration center is the motor neuron.
• The effector (muscle or gland) generates a response to the signal.
• Somatic reflex activates skeletal muscle.
• Autonomic reflex controls visceral effectors (smooth or cardiac muscle or gland).
• Spinal reflexes do not involve higher brain centers for the arc to function
• Intrafusal muscle fibers are muscle spindles made up of 3-10 modified small skeletal muscles fibers
• Extrafusal muscle fibers are regular muscle fibers surrounding a muscle spindle