Nervous system 1 Flashcards
What are some functions of the brains?
- Breathing
- Movement
- Emotion
- Eating
- sex
Brain is 2% of the body weight but: (3)
- 15% of cardiac output
- 20% of total body oxygen consumption
- 25% of total body glucose utilization
What does Central nervous system consist of?
brain + spinal cord
What does PNS mean?
Peripheral nervous system
What is the brainstem and what does it do?
most primitive part of the brain, essential processes like breathing
What is the cerebellum and what does it do?
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- Provide smooth and coordinated body movement
What is the Basal Ganglia and what is it for? (2)
Group of neurons with different functions
- Motor control
- Learning
What diseases originate in the basal ganglia?
Parkinson’s and Huntington’s
What is the Limbic system and what does it do? (2)
Group of neurons with different functions
- Emotions
- Memory formation
What do neurons contain? (3)
- Cell body (soma) with nucleus and dendrites
- Axon with myelin sheath
- Synapses
What do dendrites do?
Receive information from outside
What are Spines?
points on dendrites where information comes in
What do Axons do?
Sending signal to axon end
What are Glia cells?
Type of cell that provides physical and chemical support to neurons and maintain their environment.
-10-50x more than neurons
What kind of Glia cells are there? (3)
- Oligodendrocytes
- Astrocytes
- Microglia
