8/11/2019 MCAT Bio Brain

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1. Nodes of ranviera. Ion exchange

2. Axon hillocka. Ion exchange

3. Schwann cells parasympythetic?

4. Voltage gated ion channels5. Types of neurons6. Na+/K+ pump and K channel maintain cell at -70 mV7. Reflex arc

a. Interneuron causes activation/deactivationi. Deactivation does not occur at motor neuron, but instead at

interneuronii. Motor neurons are only excitatory

8. Alcohol inhibits cerebelluma. Cerebellum has different neurotransmitters than rest of brain

9. Proprioception: you have enough awareness of your limb locations that you

still have fine motor control10. Medulla

a. Controls breathing, heart rateb. Middle man, influenced by upper parts of brain

11. Swelling of braina. Tries to go into the spinal column, destroys medulla first, then

cerebellum12. Hippocampus short term memory to long term memory13. Sweat, normally sympathetic, youd think would secrete NE, but release Ach 14. Sympathetic NE15. Adrenal medulla evolved sympathetic ganglia is Ach b/c not end target16. Neural component of sympathetic constriction (NE), hormonal component

COULD cause dilation (E)17. Cornea, anterior chamber (aquous center), pupil (in iris), lens, vitrius humor

(posterior chamber), retinaa. Retina

i. Main focal point: fovea1. Highest concentration of cone receptors in fovea

b. Optic diski. Blood vessels and optic nerve come out

1. No working retina, causes blind spot2. Telophase 1: dihaploid