1) The parasympathetic nervous system generally promotesdigestion. Innervation is via the vagus nerve. Ach binds tomuscarinic receptors. True or False?
2) Which of the following statements is correct?
a) The liver receives oxygenated blood from the hepatic arteryand deoxygenated blood from the hepatic portal vein. Branches ofboth veins carry blood into liver sinusoids. Hepatocytes absorboxygen, most of the nutrients, and some toxins. Needed substancesare secreted back into the blood. Blood then drains into thecentral vein and into a hepatic vein.
b) The liver receives deoxygenated blood from the hepatic arteryand oxygenated blood from the hepatic portal vein. Branches of bothveins carry blood into liver sinusoids. Hepatocytes absorb oxygen,most of the nutrients, and some toxins. Needed substances aresecreted back into the blood. Blood then drains into the centralvein and into a hepatic vein.
c) The liver receives oxygenated blood from the hepatic arteryand deoxygenated blood from the hepatic portal vein. Branches ofboth veins carry blood into liver central vein. Hepatocytes absorboxygen, most of the nutrients, and some toxins. Needed substancesare secreted back into the blood. Blood then drains into thesinusoids and into a hepatic vein.
d) The liver receives oxygenated blood from the hepatic arteryand deoxygenated blood from the hepatic portal vein. Branches ofboth veins carry blood into liver sinusoids. Kupffer cells absorboxygen, most of the nutrients, and some toxins. Needed substancesare secreted back into the blood. Blood then drains into thecentral vein and into a hepatic artery.
3) Regulation of secretion of saliva involves:
a) Parasympathetic and sympathetic stimulation
b)Action of the inferior and superior salivatory nuclei in themedulla
c)Activity of the myenteric plexus
d)Activity of the submucosal plexus
4) Bile formed in the liver is transported to the gall bladderfor storage through which pathway? (Some steps may be omitted)
a)Bile duct, right and left hepatic ducts, common hepatic duct,cystic duct
b)Common hepatic duct, right and left hepatic ducts, bile duct,cystic duct
c) Right and left hepatic ducts, bile ducts, common hepaticduct, cystic duct
d) Bile ducts, common hepatic duct, cystic duct, right and lefthepatic ducts
5)Which of the following statements is incorrect?
a)Sodium ions are transported out of absorptive cells bybasolateral sodium pumps.
b) Negatively charged ions follow sodium or are moved out byactive transport.
c)Most water soluble vitamins are absorbed by activetransport.
d) Water absorption in the GI tract involves osmosis
6) Insulin is needed for carbohydrate metabolism because it
a)is required for the breakdown of complex carbohydrates
b)transports glucose in the bloodstream.
c)acts as a glucose receptor molecule on the cell surface.
d) is part of an active transport mechanism required for entryof glucose into cells
e)increases the insertion of a particular type of glucosetransport protein into the cell membrane
