GI_Digestion_Absorption_Metabolism| Contains 30 Higly Tested MCQ and Answer Key

GI/Digestion/Absorption/Metabolism 30 MCQ and Answer Key + 1 Vitamins co-transported with Na include all EXCEPT: a) thiamine b) folate c) niacin d) riboflavin e) pyridoxine 2 Fat soluble vitamins include all EXCEPT: a) vitamin A b) vitamin C c) vitamin D d) vitamin E e) vitamin K 3 The largest daily volume of secretions in the GIT originates in the: a) salivary glands b) stomach c) gallbladder (bile) d) pancreas e) intestine 4 Iron: a) most dietary iron is in the ferrous state b) most iron is absorbed in the upper small intestine c) a ferritin micelle contains 1,000 atoms of iron d) 90% of body iron is in haemoglobin e) 10% of dietary iron is normally absorbed 5 Ketone bodies: a) are not formed under normal conditions b) are all moderately strong acids c) are formed when intracellular glucose is deficient d) are easily metabolised in the liver e) all of the above6 Creatinuria can occur in all EXCEPT: a) healthy children b) pregnant women c) starvation d) hypothyroidism e) poorly controlled diabetes mellitus 7 Cations + in normal (fasting) gastric juice include all EXCEPT: a) Na ++ b) Ca + c) K ++ d) Mg + e) H 8 Human hepatic bile (hepatic bile duct) is largely: a) water b) bile salts c) bile pigment d) cholesterol e) lecithin 9 The nutritionally essential amino acids include: a) alanine b) cysteine c) tyrosine d) methionine e) glutamine 10 The largest glycogen store in the adult body is in the: a) liver b) spleen c) muscle d) pancreas e) circulating red cell mass 11 TSH secretion is stimulated by: a) dopamine b) somatostatin c) cold temperatures d) stress e) glucocorticoids12 Thyroxine (T4) has greater affinity for: a) thyroxine-binding globulin b) transthyretin c) thyroxine-binding pre-albumin d) albumin e) triiodothyronine 13 GLUT is an example of: a) simple diffusion b) facilitated diffusion c) primary active transport d) secondary active transport e) endocytosis 14 The most common cell type of the endocrine pancreas is: a) A cells b) B cells c) C cells d) D cells e) F cells 15 Both insulin and somatostatin: a) are released from extra-pancreatic sites b) receptors are linked to G proteins c) inhibit release + of glucagon d) cause K uptake by cells e) are polypeptides containing two chains linked by disulphide bonds 16 Aldosterone is secreted by: a) zona reticularis b) zona fasciculata c) zona glomerulosa d) zona fasciculata and reticularis e) zona glomerulosa and fasciculata 17 Regarding aldosterone: a) it is released in response to hypokalaemia b) it has glucocorticoid action + c) it works via G proteins to increase Na d) its release results in alkaline urine e) it is highly protein-bound reabsorption18 Calcitonin secretion is increased by: a) gastrin b) CCK c) secretin d) glucagon e) all of the above 19 All of the following bind to intracellular receptors EXCEPT: a) cortisol b) aldosterone c) 1,25-DHCC d) parathyroid hormone e) thyroxine 20 How many trophic hormones does the anterior pituitary produce? a) 2 b) 3 c) 5 d) 6 e) 8 21 All of the following are high energy phosphate compounds EXCEPT: a) adenosine triphosphate b) glucose 6-phosphate c) creatine phosphate d) adenosine diphosphate e) guanosine triphosphate 22 Under aerobic conditions, 1mol glucose forms: a) 2mol ATP b) 8mol ATP c) 16mol ATP d) 38mol ATP e) 42mol ATP 23 The approximate ratio of fat : CHO energy stores is: a) 2 : 1 b) 4 : 1 c) 10 : 1 d) 20 : 1 e) 40 : 124 Nutritionally essential amino acids include: a) glycine b) serine c) lysine d) glutamine e) tyrosine 25 Uric acid is formed by the breakdown of: a) purines b) pyrimidines c) glutamine d) urea e) all of the above 26 The LDL contains which aproprotein? a) A b) B-48 c) B-100 d) C e) E 27 Regarding cellular metabolism of cholesterol: a) it inhibits HMG-CoA red??? b) is processed in part to other cholesterol esters by the enzyme acetyl CoA ??? acyltransferase c) it inhibits the formation of CO2 receptors d) all of the above e) none of the above 28 Which of the following substances decreases the activity of hormone-sensitive lipase? a) adrenaline b) thyroxine c) serotonin d) TSH e) prostaglandin E 29 Chromium deficiency leads to: a) insulin resistance b) hypogondal dwarfism c) anaemia d) changes in ossification e) thyroid disorder30 Vitamin B1 (thiamine) deficiency leads to: a) anaemia b) beri beir c) convulsions d) dermatitis e) pellagraAnswers