Question | Answer |
4 main functions of the nervous system | - Send impulses from the CNS
- Send impulses to the CNS
- Coordination of activities of all parts of the nervous system
- Sensory functions that detect changes in the body |
2 main branches of the nervous system | Sympathetic/Parasympathetic |
Electrical impulses that are transmitted from one nerve to another by various chemicals called | Neurotransmitters |
Afferent | Sensory |
Efferent | Motor |
The tendency of the body to maintain stability | Homeostasis |
Central nervous system consists of... | Brain, brain stem & spinal cord |
The somatic system relays motor impulses to what type of muscle? | Skeletal |
The autonomic system transmits motor impulses to what type of muscle? | Smooth |
What 2 main branches consist of the autonomic nervous system? | Sympathetic & Parasympathetic |
The PNS is divided into what 3 divisions? | Somatic, autonomic & enteric |
Small gaps that allow nerve impulses to travel from one neuron to another | Synapses |
Chemicals that are located in and released by neurons | Neurotransmitters |
Consists of neuron cell bodies & dendrites | Gray matter |
Consists of nerve fibers | White matter |
What is the largest part of the brain? | Cerebrum |
How do the two hemispheres communicate? | Corpus callosum |
What does the brain stem consist of? | Mid brain (mescencephalon)
Pons
Medulla oblongata |
Sends messages between the brain & the spinal cord | Thalamus |
Prevents certain molecules & substances from entering and damaging the brain | Blood-brain barrier |
Built in thermostat & appetite center | Hypothalamus |
What's another name for the mid brain? | Mesencephalon |
What protects the CNS? | BBB, cerebrospinal fluid, vertebral column, meninges |
The sympathetic system responds to what type of situations? HINT: "fight or flight" | Stressful |
What are the main NTs of the sympathetic system? | Norepinephrine & epinephrine |
Drugs that mimic natural sympathetic NTs are referred to as...? | Sympathomimetics & adrenergics |
Drugs that block sympathetic actions are called...? | Sympatholytics |
What is the main NT of the parasympathetic system? | Acetylcholine |
Drugs that mimic natural parasympathetic NTs are called...? | Parasympathomimetics & cholingerics |
Drugs that block parasympathetic actions are called | Anticholingerics |
Controls motor function, parts of speech, emotions, problem solving, reasoning & planning? | Frontal lobe |
Important in orientation, recognition, sensation & understanding language | Parietal lobe |
Important in control of perception and interpretation related to vison | Occipital lobe |
Important in receiving and integrating auditory stimuli and regulating emotion, personality & behavior | Temporal lobe |