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SCI 221 Week 7-13

Assignment 2

QuestionAnswer
Week 7: In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. TRUE
Week 7: The magnitude of the action potential peaks when the sodium channels close. TRUE
Week 7: When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: Saltatory conduction
Week 8: A reflex consists of either a muscle contraction or a __________. glandular secretion.
Week 8: Blood vessels in both digestive organs and skeletal muscles are dilated by sympathetic stimulation. FALSE.
Week 8: Nerves that innervate the floor of the pelvic cavity and some of the surrounding areas are found in the _____ plexus. coccygeal
Week 9: When the right cornea senses a tactile stimulus, what happens to the left eye? It blinks
Week 9: The type of cells that secrete ACTH are: corticotrophs.
Week 9: Movement of hair cells in the organ of Corti against the _____ membrane can stimulate nerve impulse condition tectorial
Week 10: All of the following are granulocytes except neutrophils eosinophils lymphocytes basophils lymphocytes
Week 10: The volume percentage of RBC in whole blood Hematocrit
Week 10: The chemoreceptors in the carotid bodies are particularly sensitive to: hypercapnia
Week 11: Recognition of antigens by antibodies occurs when an antigen’s epitopes fit into and bind to an antigen molecule’s antigen-binding site
Week 11: The function of which antibody is basically unknown? IgD
Week 11: The _____ postulates that when an antigen enters the body, it selects the clone whose cells are committed to synthesizing its specific antibody and stimulates these cells to proliferate and to thereby produce more antibodies. clonal selection theory
Week 12: Which of the following constitutes total lung volume? Residual volume and vital capacity
Week 12: Internal respiration can be defined as: the exchange of gases between the BLOOD CAPILLARIES and the TISSUE CELLS.
Week 12: Ciliated cells lining the respiratory tract: help move the mucus blanket toward the pharynx.
Week 13: Saliva contains the enzyme amylase
Week 13: Pepsinogen is converted to pepsin by hydrochloric acid, which is produced by the _____ of the gastric glands. parietal cells
Week 13: The final product of carbohydrate digestion is a: monosaccharide.
Created by: marleneusi
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