Week One Quiz 1. Radial glial cells involved in new neuron formation eventually are transformed into (Points : 1) progenitor cells. oligodendroglia. microglial cells. visual sensory neurons. astrocytes. Question 2.2. The brain floats within _______ fluid, which is contained within the _______. (Points : 1) intracellular; pia mater cerebrospinal; subarachnoid space cerebrospinal; blood vessels interstitial; subarachnoid space extracellular; dura mater Question 3.3. Synapses are most commonly formed between a(n) _______ and a(n) _______. (Points : 1) axon terminal; dendrite dendrite; soma soma; glial glial; dendrite dendrite; axon terminal Question 4.4. Placing neurons and their synaptic contacts into a medium containing no calcium ions would be expected to (Points : 1) decrease the time required to move sodium ions out of the axon terminal. enhance the voltage changes associated with the action potential. increase the number of transmitter molecules released from the axon terminal. prolong the refractory period of the action potential. prevent the release of neurotransmitter into the synapse. Question 5.5. “Autotopagnosia” involves _______ and is produced by damage to the _______. (Points : 1) problems in naming one’s own body parts; left parietal lobe a problem in remembering the names of body parts; right frontal lobe an inability to pronounce the names of major body parts; right occipital lobe a problem in speech perception; right parietal lobe problems in naming one’s own body parts; right parietal lobe Question 6.6. Which of the following is true of metabotropic receptors? (Points : 1) Metabotropic receptors conserve energy. Metabotropic receptors are slower than ionotropic receptors. Metabotropic receptors control a single ion channel. Metabotropic receptors are closely associated with an ion channel. Metabotropic receptors are faster than ionotropic receptors. Question 7.7. Match up the correct receptor type and effect: (Points : 1) ionotropic; direct opening of an ion channel ionotropic; more time required to open an ion channel ionotropic; G protein activation leads to activation of a second-messenger metabotropic; second-messenger effects are specific to neuronal communication metabotropic; rapid short-lived effects on ion channels Question 8.8. The _______ is the most caudal portion of the brain stem. (Points : 1) spinal cord pons cerebellum medulla oblongata metencephalon Question 9.9. Which of the following is offered in the textbook as an explanation of the difference in brain size between humans and chimpanzees? (Points : 1) The asymmetrical period of neuron formation is longer in the chimpanzee brain. Chimpanzee brains have fewer founder cells. The symmetrical and asymmetrical periods of division are longer in the human brain. Chimpanzee brains show more apoptosis activity. Chimpanzee brains have more dendritic branches than do human brains. Question 10.10. Which of the following is true of receptors? (Points : 1) The effects of hormones do not involve receptor activation. Neurotransmitters act on binding sites on receptors to exert their effects. Receptors are insensitive to drugs. Neuromodulators are ligands that come from outside the body. Hormone receptors are found in all tissues except brain.