Bio 161 Exam 3 Test Questions and Correct Answers

The brain contains ___% of the body's neural tissue (interneurons) 97 There are about ____ billion neurons in the brain, supported by _____ cells 100;glial How many synapses per neuron 5000 How many synapses in brain 500 trillion Function of oligodendrocytes produce myelin sheaths Function of ependymal cells line cavities, produce CSF Function of microglia small macrophages Most abundant neuroglial cell astrocytes Function of astrocytes -form blood brain barrier -nourish neurons -reabsorb neurotransmitters and K+ 3 regions of brain forebrain, midbrain, hindbrain 2 parts of forebrain cerebrum and diencephalon Function of forebrain Higher order thinking processes Midbrain integrates info from __________ __________ and movement special senses Hindbrain function refined motor movements, vital functioning (breathing, digestion), arousal and alertness Longitudinal issues divides _________ R and L hemispheres Pre-central gyrus primary motor cortex Post-central gyrus primary sensory cortex