Week 1: Nervous System Intro Flashcards
Nervous system functions
- Maintain homeostasis
- Receive sensory input
- Integrate info
- Control muscles and glands
- Establish and maintain mental activity
Nervous system divisions
- Central
- Peripheral
Central nervous system
- Brain
- Spinal cord
Peripheral nervous system composition
- Nerves
- Sensory receptors
Peripheral nervous system divisions
- Sensory (afferent)
- Motor (efferent)
Sensory division of PNS function
Transmits action potentials from sensory receptors to CNS
Motor division of PNS function
Transmits action potentials from CNS to effectors (muscles, glands)
Divisions of the motor PNS
- Somatic
- Autonomic
Function of somatic motor PNS
- CNS –> skeletal muscle
- Voluntary control
- Single neuron system
Single neuron system
CNS –> effector
Function of autonomic motor PNS
- CNS –> smooth/cardiac muscle and certain glands
- Subconscious/involuntary control
- 2-neuron system
2-neuron system
CNS –> ganglion –> effector
Divisions of autonomic nervous system
- Sympathetic
- Parasympathetic
Sympathetic autonomic nervous system
Prepares body for physical activity
Parasympathetic autonomic nervous system
Regulates resting or vegetative functions such as digesting food or voiding the bladder
