Chapter 35- Nervous System Flashcards
Anatomy
The science of the shape and structure of organisms
Cells
The structural and functional units of all living organisms
Organ
A group of different tissues with a specific job
Organ system
A group of organs that work together to perform a specific job
Homeostasis
The ability of an organism or cell to maintain homeostasis
What is the function of the nervous system
It receives and then sends out information about your body. It also monitors changes and keeps the heart beating
Neuron
Specialized cell transmitting nerve impulses. It’s electrical and chemical. The messages that are constantly traveling through your body are carried by neuron or nerve cell
Explain resting and action potential
There are resting spots on axons there are also sodium and potassium pumps on the axons. The sodium/potassium ions becoming negative and positive create nerve impulses. When the sodium channels close The potassium ions leave which make the action potential crash. The action potential occurs at depolarization
The synapse
The axon terminal meets another neuron at dendrites
3 types of neurons
Sensory
Interneuron
Motor
What do the sensory neurons do
They conduct impulses toward the brain/spinal cord
The brain
Is a organ of soft nervous tissue that functions as the coordinating center of sensation and intellectual and nervous activity. It’s covered in 3 layers of connective tissue that nourishes and protects it called the meninges. The cerebral fluid is found there
Two main divisions of nervous system
Peripheral
Central
The peripheral system
Outside the central nervous system. It includes the cranial nerves, spinal nerves, and the ganglia
The two parts of the peripheral system
- Sensory division
2. Motor division
