Question1 of 25Which of the following describes structures from the co

Question1 of 25Which of the following describes structures from the conduction zone?Pharynx, alveolar sacs, alveoli, tracheaBronchus, nasal cavity, trachea, pharynxNasal cavity, respiratory membrane, alveoli, bronchusTrachea, bronchus, bronchioles, alveoliPharynx, larynx, bronchus, alveoliQuestion2 of 25What structure in the nasal cavity serves to increase the surface area of the mucosa exposed to air?PalateConchaeNasal septumNaresParanasal sinusesQuestion3 of 25What is internal respiration?The intake of atmospheric air into the bodyGas exchange between the atmospheric air and the bloodGas exchange between the lungs and the body tissuesGas exchange between the blood and the tissue cellsIntake of oxygen and release of carbon dioxide from tissue cellsQuestion4 of 25What is the role of the diaphragm in breathing?When the diaphragm contracts, the thoracic cavity decreases in size and inspiration occurs.When the diaphragm contracts, the thoracic cavity increases in size and expiration occurs.When the diaphragm contracts, the thoracic cavity decreases in size and expiration occurs.When the diaphragm contracts, the thoracic cavity decreases in size and external respiration occurs.When the diaphragm contracts, the thoracic cavity increases in size and inspiration occurs.Question5 of 25What determines the flow of gases across the respiratory membrane?Gases are dissolved in the plasma and flow through the respiratory membrane gaps.Gases flow from lower to higher concentration using simple diffusion.Gases flow from a higher to lower concentration using simple diffusion.Gases attach to a hemoglobin molecule and then travel across the membrane.Gases are dissolved in the plasma and cross using facilitated diffusion.Question6 of 25Which of the following describes the movement of carbon dioxide?Carbon dioxide moves from alveolar air into pulmonary capillaries.Carbon dioxide moves from pulmonary capillaries into alveolar air.Carbon dioxide moves from blood to tissue cells.Carbon dioxide binds to hemoglobin and is removed through the kidneys.Carbon dioxide moves from blood to oxyhemoglobin.Question7 of 25What is the significant function of the residual volume?It expands the lung volume.It increases the surfactant of the alveoli.It allows gas exchange to continue even between breaths.It represents the total lung capacity of a body.It keeps the oxygen levels as low as possible.Question8 of 25What area(s) of the brain are involved in the control of breathing?Medulla onlyCerebellum onlyPons onlyMedulla and the cerebellumMedulla and the ponsQuestion9 of 25What is an important chemical stimulus that affects breathing rate?Increased calcium levelsIncreased anxietyIncreased carbon dioxide levelsIncreased potassium levelsIncreased mucous production in the bronchusQuestion10 of 25What is the proposed reason for sudden infant death syndrome (SIDS)?Decreased oxygen flow across the respiratory membraneImpaired neural control of respirationIncreased build-up of carbon dioxideImpaired respiratory membranesDecreased alveolar elasticityQuestion11 of 25Which of the following is associated with COPD?Lack of mucous production resulting in excessive coughingCessation of breathing due to anxietyHyperventilation resulting in metabolic alkalosisA genetic disorder with excessive mucous productionRespiratory failure and respiratory acidosisQuestion12 of 25In which major digestive organ does most food absorption occur?StomachSmall intestineLarge intestineLiverColonQuestion13 of 25What layer of the alimentary canal contains nerve fibers and lymphatic tissue?MucosaSubmucosaMuscularis externaSerosaVisceral peritoneumQuestion14 of 25What is the process of chewing called?DeglutitionAbsorptionSegmentationDefecationMasticationQuestion15 of 25The absorptive effectiveness of the small intestine is enhanced by which of the following structures?Plicae circularis and intestinal villiBrunner’s glandsDigestive enzymesRugaeGastric pitsQuestion16 of 25Which of the following describes permanent teeth?There are 32 permanent teeth, and the wisdom teeth are the last to emergeThere are 27 permanent teeth, and the first molars are usually the last to emergeThe number of permanent teeth is always equal to the number of primary teeth.The number of upper permanent teeth is not equal to the number of lower permanent teeth.The number of permanent teeth varies widely from person to person.Question17 of 25Which of the following describes saliva?It is composed of water only.It contains enzymes that begin the breakdown of proteins.It is produced by the palatine tonsils.It serves to warm food before it is swallowed.It dissolves food chemicals so they can be tasted.Question18 of 25Hydrochloric acid is secreted by which of the secretory cells of the stomach?Chief cellsParietal cellsSerous cellsAlpha cellsMucous neck cellsQuestion19 of 25What is the enzymatic breakdown of a food molecule called?DiffusionActive transportHydrolysisSynthesisDenaturedQuestion20 of 25The mucosa tunica of the esophagus is lined with what type of cells?Stratified squamous epitheliumStratified columnar epitheliumMicrovilli epitheliumPseudostratified squamous epitheliumCiliated columnarQuestion21 of 25Digestion of which of the following would be most affected if the liver were severely damaged?LipidsCarbohydratesProteinsStarchesMonosaccharideQuestion22 of 25The ingestion of a meal high in fat content would cause which of the following to occur?Severe indigestion would occur, caused by the lack of sufficient digestive enzymes.This type of food would cause secretion of gastrin to cease, causing digestive upset.Bile would be released from the gall bladder to emulsify the fat in the duodenum.The acid secretions from the stomach would be sufficient to digest this food.Acid reflux would develop and cause damage to the esophagus.Question23 of 25What are the essential amino acids?Amino acids produced by the human body.Amino acids that must be obtained through diet.Amino acids that are building blocks of carbohydrates.Amino acids released from the hydrolysis of lipids.Amino acids that make up the essential vitamins.Question24 of 25What is basal metabolic rate?Total amount of kilocalories needed to fuel daily activitiesTotal amount of kilocalories burned in a dayTotal amount of heat produced by the body per unit of time at restTotal amount of heat produced in a dayTotal difference between energy used and kilocalories consumed in a dayQuestion25 of 25A person who has collapsed due to dehydration but still maintains effective heat loss mechanisms is experiencing what disorder?Heat exhaustionHeat strokeHypothermiaFever due to pyrogensDysfunction of the hypothalamus

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