MCAT Nervous system
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MCAT Nervous system - Details
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33 questions
| 🇬🇧 | 🇬🇧 |
| The brain and the spinal cord | Central Nervous system |
| Somatic Nervous system: Voluntary Movement Autonomic nervous system: involuntary system | Peripheral nervous system (2) |
| Left: language, math and logic right: spatial art | Left hemisphere and right hemisphere of brain |
| In charge of executive function tells the other lobes to do other things involved in judgement and planning | Frontal Lobe |
| This is for hearing and olfaction | Temporal lobe |
| The somatosensation (temperature and pain) and the gustation (taste) and knowing where your body parts are | Partial lobe |
| They are for seeing | Occiptal lobe |
| They allow you to do movements (primary motor) premotor cortex: they allow you to prepare to make a movement | Primary motor cortex and pre-motor cortex |
| Brocas Area: speech production Wernickes Area: understanding speech | Brocas Area and Wernickes area |
| This includes the medulla, the pons and the cerebellum | The brain stem |
| The RAS: resticular activating system this is responsible for increasing arousal, sleep waking cycles | The mid-brain |
| Controls voluntary movements | The Basal ganglia |
| This is where the action potentials take place because there are ions that can be exchanged between the neuron | Nodes of ranvier |
| They provide support for neurons and they do not produce action potentials . Microglial cells: they clean up the debris | Glial cells and microglial cells |
| 1. the CNS: this is the oligodendrocytes 2. The PNS: the swann cells | The CNS and the PNS |
| Action potential: they are electrical and the synapse: they are chemical | Action potential vs synapse |
| They carry the vesicles on the axon and they involve the two motor proteins (dynenin and kinesin). | Motor proteins |
| Adding up the action potentials across different spaces (come at the same time) and the action potentials add up at the same location (at different times). | Spatial summation vs temporal summation |
| This is the potential; when the cell is not doing anything usually -70 mv | Resting Membrane Potential |
| 1. Sodium Potassium Pump: Sodium goes out usually and K+ goes in Pump sodium out (3) and potassium is brought in (2) 2. The potassium leak channel | How is the resting membrane potential maintained |
| 1. the refractory period: after you fire you may not fire right away because the channels may reset. 2. the absolute refractory period: when you cannot fire at all 3. the relative refractory period: this is when you can fire but usually do not | The refractory period vs the absolute refractory period vs relative refractory period |
| Voltage-gated channels | Ion channels involved in the action potential, ex: calcium: they are voltage-gated and they release calcium, they trigger the release of vesicles that contain the neurotransmitters |