organisation of the nervous system Flashcards
name the structures in the nervous system
Brain
- Neurons enclosed in skull
Spinal cord
– connects to brain & enclosed in spinal cavity
Nerves
- bundles of neuronal axons
- Cranial nerves emerge from brain
- Spinal nerves emerge from spinal cord
Ganglia
- groups of cell bodies outside brain & spinal cord
Enteric plexuses
- networks in digestive tract
Sensory receptors
- monitor changes in internal or external environments
name the 3 nerves that have functions
sensory receptor and afferent nerves
inter neurons
motor activity efferent nerves
explain the function of Sensory Receptors & afferent (sensory) nerves
Carry information to brain & spinal cord
explain the function of inter-neurones
Integration - information processing
Carried by short interneurons
explain the function of Motor activity- efferent (motor) nerves
Carry signals from brain and spinal cord to glands and muscles (effectors)
what 2 groups can the nervous system be organised into
central nervous system (CNS)
peripheral nervous system (PNS)
what is part of the Central Nervous System (CNS)
brain & spinal cord
what is part of the
Peripheral Nervous System (PNS)
all nervous tissue outside the CNS
- Somatic nervous system (SNS)
- Autonomic nervous system (ANS)
- Enteric nervous system (ENS)
explain the Somatic nervous system (SNS) which is part of the peripheral nervous system
sensory neurons in somatic receptors and motor neurons to skeletal muscle.
explain the Autonomic Nervous System (ANS)
which is part of the peripheral nervous system
sensory neurons from autonomic receptors and motor neurons to smooth muscle, cardiac muscle and glands.
explain the Enteric Nervous System (ENS)
which is part of the peripheral nervous system
sensory and motor neurons of the GI tract
