HOMOESTATIS AND THE NERVOUS SYSTEM Flashcards
The body is designed in such a way that all the organs and organ systems work together in order to maintain _____ or maintaining the internal environment in equilibrium
Homoestasis
The organ systems are controlled by the ______ system
Nervous
This system secretes hormones that regulate all the body’s activities
Endocrine system
Coordinates and regulates the body’s feedback mechanism to maintain homeostasis.
The nervous system
A highly organized and complex collection of nerves ( a collection of neurons) and neurons
The Nervous System
Specialized cells that transmit messages to and from the brain and spinal chord to other parts of the body
Neurons
Neurons that receives messages from the senses and send them to the central nervous system are called ________
Afferent neurons
Send messages from the central nervous system to the different parts of the body
Efferent neurons
Receives signals from other neurons or from the body, and pass those messages along the cell body
Dendrites
The support center of the neuron
Cell Body
If an outgoing message is to be sent away, it passes from the _______ to the ____, which passes those messages away from the ______ to the ______ and onto other neurons or other body parts.
cell body; axon
cell body; axon terminal
It is a protective layer around some acns and helps speed up the signal messages
Myelin Sheath
These chemicals travel through the space in between neurons/other body cells called synapses
Neurotransmitters
These signal messages travel as electrical signals, and as they reach the end of a neuron, chemicals called _____ are stimulated
Neurotransmitters
Consists of the brain and spinal chord
Central Nervous System
Made up of nerves and the sensory organs
Peripheral Nervous System
The major outer part of the brain. It is divided into two hemispheres.
Cerebrun
These two hemispheres are connected by the ______
corpus callusom
At the back part of the brain, it controls balance and fine muscle movement
Cerebellum
Bottom of the brain, it connects the cerebrum to the spinal chord
Brain Stem
Three parts of Brain Stem
The midbrain, the pons, and the medulla
Serves as the relay center, where incoming and outgoing messages are handled
Thalamus
These structures are responsible for basic biological needs like hunger, temperature, control, memories and emotional response
Limbic System
Responsible for cognitive functions and movement
Frontal lobe
