Nervous System Flashcards
reflex
an automatic response that is not consciously controlled by you
synapse
the space or gap between neurons (which must be jumped by chemicals to continue the impulse signal)
Two ways of controlling Body functions
electrical signals from nerves and chemical signals from the endocrine system
neuron/nerve cell
cell that carries information through the nervous system is called a nerve cell, structure of a neuron helps it function. Neurons are made up of dendrites and axons. A dendrite is the branched structure that picks up information. The axon receives information from the dendrite and sends it away from the cell.
Peripheral nervous system
a network of nerves that branches out from the CNS and connects to the rest of the body, controls both involuntary and voluntary actions.
Central Nervous System
he brain and spinal cord make up the CNS. The job of the CNS is to control most of the functions of the body and mind.
Nerve Impulses
dendrite receives information, the neuron sends the information along the cell through the long axon. The message carried by the neuron is called a nerve impulse. The axon transmits the impulse to nearby cells.
Brain
has about 100 billion neurons, all of which are interneurons, covered by layers of connective tissue and fluid that help protect, 3 components: control voluntary and involuntary actions such as heart rate, memory, and muscular coordination.
Spinal Cord
vertebral column that you can feel with your fingers down the length of your neck and back contains the spinal cord, ayers of connective tissue surround the spinal cord, along with a layer of fluid.
Somatic and Automatic
The somatic nervous system controls voluntary actions, like typing a text message or throwing a ball. The autonomic nervous system controls involuntary actions, such as digestion or pupil dilation
