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The gland that produces tears in the eye is called the lacrimal gland Which layer of the eye contains rods and cones retina Which area of the retina lacks rods and cones and therefore does not detect images optic disc The gel-like substance that reinforces the eyeball and prevents it from collapsing inward is the vitreous humor What structure of the eye focuses light on the retina lens Sound waves entering the external auditory canal hit the eardrum, also known as the tympanic membrane Equilibrium receptors are located in the inner ear The auditory ossicle called the "anvil" is also called the incus Gustatory hairs are to taste as olfactory hairs are to smell What are the primary taste sensation Bitter, salty, sweet, umami, sour Which system produces chemical messengers known as hormones endocrine system The thyroid gland is located below the Adam's apple The body's major metabolic hormone is called thyroid hormone What hormone is released by the adrenal medulla epinephrine The "fight-or-flight" response triggers the release of epinephrine The hormone that appears to help regulate our sleep-awake cycles is melatonin The matrix of blood is called plasma What is the most abundant formed elements erythrocytes a blood clotting disorder hemophilia What blood type(s) can a person with blood type O receive: blood type O Pulmonary circulation involves blood flow to and from the heart and the lungs What structure divides the left from the right ventricle interventricular septum Deoxygenated blood is returned to the right side of the heart by the: superior and inferior vena cavae What blood vessels carries oxygenated blood from the lungs pulmonary vein The sinoatrial node is located in the right atrium The volume of blood pumped out by each ventricle with each beat of the heart is called the stroke volume The path of blood flow within the systemic vascular system is arteries, arterioles, capillary beds, venules, veins What arteries supplies the first half of the large intestine superior mesenteric artery What blood vessels is a direct branch of the ascending aorta both the right and left coronary arteries The external carotid artery serves the skin and muscles of the head and neck What vein returns blood to the superior vena cava brachiocephalic veins The right and left renal veins empty blood from the kidneys The friction blood encounters as it flows through the vessels is called peripheral resistance Gas exchange occurs in the alveoli The nasal cavity is separated from the oral cavity by both the hard and soft palate Air from the nasal cavity enters the superior portion of the pharynx called the nasopharynx The flap of elastic cartilage that protects food from entering the larynx when swallowing is the epiglottis Terminal bronchioles eventually terminate in alveoli The serous membrane covering the surface of the lungs is called the visceral pleura _________ occurs when diaphragm and intercostal muscles relax Expiration (exhalation) Which nonrespiratory air movement clears the upper respiratory passageways sneezing The respiratory movement representing the total amount of exchangeable air is the vital capacity Oxygen binds with hemoglobin in the blood to form oxyhemoglobin The bluish cast that results from inadequate oxygenation of the skin and mucosa is called cyanosis The molecule that prevents lung collapse by lowering the surface tension of the water film lining each alveolar sac is called surfactant The abbreviation IRDS stands for infant respiratory distress syndrome The fold of mucous membrane that secures the tongue to the floor of the mouth and limits its posterior movements is called the lingual frenulum What is the moist innermost layer that lines the alimentary canal: mucosa The release of food from the stomach into the small intestine is regulated by the pyloric sphincter (valve) The small intestine extends from the pyloric sphincter to the ileocecal valve The primary function of the ___________ is absorption of nutrients small intestine The organ responsible for drying out indigestible food residue through water absorption and the elimination of feces is the: large intestine Which accessory digestive organ is situated retroperitoneal pancreas The sequence of steps by which large food molecules are broken down into their respective building blocks by catalytic enzymes within hydrolysis reactions is called chemical digestion The propulsive process that moves food from one organ to the next is called peristalsis The process by which food within the small intestine is mixed with digestive juices by backward and forward movement across the internal wall of the organ is called segmentation Proteins are digested to their building blocks which are called amino acids The first nutrient to be chemically digested is starch The process of swallowing is also known as deglutition An alimentary segments that has NO digestive function esophagus Pepsin is necessary for the stomach to break down proteins The process by which larger molecules or structures are built up from smaller ones is called anabolism Adenosine triphosphate (ATP) is produced in greatest quantity during the electron transport chain What organ filters blood, regulates blood volume and chemical makeup kidney Most nephrons are located within the renal cortex The tube connecting the renal hilum of the kidney to the bladder is the ureter The bladder is able to expand as urine accumulates within it due to the presence of transitional epithelium Urine is transported from the bladder to the outside of the body by the: urethra The voluntarily controlled sphincter fashioned by skeletal muscle at the point where the urethra passes through the pelvic floor is called the: external urethral sphincter The process of emptying the bladder is referred to as voiding or micturition