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Unformatted text preview: alis Which of these has all of the color receptors? C Which tissue is found as the stroma of soft organs? D) Reticular ct Which of the following is important in cells which must secrete and absorb substances? B)Microvilli Which tissue forms the symphysis pubis? C)Fibrocartilage Endochondal ossification occurs in all the following except the: C) Cranial bones Which type of osteoporosis has too much blood calcium: A)Post-menopausal The most important hormone in calcium homeostasis in adults is: A)PTH Which set of movements occurs at a pivot joint: A) supination-pronation Which part of the brain is the origin of upper motor neurons? A)Pre-central gyrus Which part of the brain would receive stimuli from the spinothalamic tract? B)Post-central gyrus Which part of the brain would connect to both auditory areas and Broca’s area? D)Wernicke’s area Too much dopamine, or malformation of which part is believed to be a cause of schizophrenia? C)Pre-frontal lobe Lack of dopamine secreted into the _____ is the cause of Parkinson’s? E)Basal Nuclei Which part is the center for the “vital functions” of the heart and respiration.? 0 Which part receives all conscious sensations.? 7 Which part covers the entrance to the lateral 3 ventricle Answer 2 Which part facilitates reflexes of a skilled and repetitive nature? (A) Basal nuclei Which part would contain the reflex center for blinking? (D) Corpora qadrigemina Which part contains the respiratory center? (D) Medulla Which part controls most endocrine glands? (B) Hypothalamus Visual signals would travel to which parts? (A) Pineal gland (C) Thalamus Which part is is a cortical component of 3 the limbic system? Answer 1 The part of the limbic system which activates fear and other emotional responses: (C) Amygdala The Limbic System is usually considered as composed of the following: The cingulate gyrus - lies above the corpus callosum, connects the system to the cerebral cortex. The hypothalamus - contains the pleasure, reward, or satiety center. Mamillary body - contains memory pathways, especially for olfaction. Hippocampus - responsible for short and long term memory and learning. Amygdaloid nucleus - also part of the basal nuclei, important in emotional motor responses. Part of the thalamus and the fornix. 22 Pathways of Fear Pre-frontal cortex – Cortex – cingulate gyrus Stimulus Thalamus Hippocampus Amygdala Sympathetic N.S. “Fight or Flight” Hypothalamus Pituitary Fornix Septum Mammillary body “Low Road” “High Road” Evolution has designed the brain so that a frightening stimulus, hearing an explosion for instance, is picked up by the thalamus and sent directly to the amygdala. The amygdala, in turn, communicates with other regions to set in motion the body’s "fight-or-flight" responses. Experiences that trigger the amygdala can lay down such strong memories that, in some people, a similar stimulus even years later will set off a panic attack - a symptom of Post-traumatic stres...
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This note was uploaded on 01/29/2013 for the course BIOL 239 taught by Professor Swan during the Fall '12 term at New Mexico.

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