Neuroscience Exam 1 Practice Questions and 100% Correct Answers

1. The neuron doctrine states that a) Neurites are fused together to form a continuous network b) Neurites are not continuous and communicate by contact c) Neurons must contain a soma, an axon, and dendrites d) DNA is transcribed to mRNA which is translated into protein b) Neurites are not continuous and communicate by contact 2. Golgi and Ramon y Cajal disagreed over the neuron doctrine; their argument was not resolved until the advent of the electron microscope because: a) Synapses are destroyed by the fixation process used for light microscopy; fixatives used for the more sensitive electron microscopy technique preserve the synapse. b) The limit of resolution of the light microscope is 100 nm, whereas the electron microscope has a limit of resolution of 0.1 nm. c) The Golgi stain only stains a small percentage of neurons, and even then not completely; the chances of finding a pair of interconnected neurons is too small to determine whether neurons communicate by contact, not continuity. d) The Nissl stain, which is necessary to resolve synapses, can only be used with the electron microscope. e) The Golgi stain, which is necessary to resolve synapses, can only be used with the electron microscope. b) The limit of resolution of the light microscope is 100 nm, whereas the electron microscope has a limit of resolution of 0.1 nm. 3. Neurons: a) Make up 10% of the cells in the brain b) Always have 2 neurites c) Wraparoundglialcellsprovidinginsulation d) Arepresentonlyinthebrain a) Make up 10% of the cells in the brain 4. The cellular organelle most appropriately called a "protein building machine" is the a) Golgi apparatus b) mitochondrion c) microtubule d) ribosome e) smooth endoplasmic reticulum d) ribosome 5. The cellular organelle that produces ATP for energy-demanding activities in the neuron is the: a) Golgi apparatus b) mitochondrion c) microtubule d) ribosome e) smooth endoplasmic reticulum c) microtubule 6. Which of the following is TRUE about ribosomes? a) They are necessary for transcription b) They are found dotting the surface of smooth ER c) They are not found in glia d) They bind mRNA d) They bind mRNA