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Oxygen and hemoglobin bind in a reversible manner to form______
a) Carboxyhemoglobin
b) Oxyhemoglobin
c) Methoglobin
d) BPG
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- Hemoglobins that denature and precipitate within RBCs as Heinz bodies are: Question 1 options: A) Methemoglobinemias. B) Thalassemias. C) Unstable hemoglobins. D) Hemoglobin M.1)The form of hemoglobin with heme bonded to carbon monoxide is________a) oxyhemoglobin.b) deoxyhemoglobin.c) methemoglobin.d) carboxyhemoglobin.e) nitro hemoglobin. 2) Surfactant in the lungs prevents_______a) compliance.b) elasticity.c) surface tension.d) gas exchangee) increased blood flow. 3) Hypoventilation can correct______a) metabolic acidosis.b) respiratory acidosis.c) metabolic alkalosis.d) respiratory alkalosis.e) all of the above 4) In restrictive pulmonary disease, ______ is decreased. a) tidal volumeb) total lung capacityc) functional residual capacityd) expiratory volumee) residual volume 5) Which of the following substances is NOT excreted in the urine of healthy people?a) Penicillinb) K+c) glucosed) bicarbonatee) NatCarbon monoxide (CO) is toxic to humans because it: A) is rapidly converted to toxic CO2. B) binds to the globin portion of hemoglobin and prevents the binding of O2. C) binds to myoglobin and causes it to denature. D) binds to the heme portion of hemoglobin and causes heme to unbind from hemoglobin. E) binds to the Fe in hemoglobin and prevents the binding of O2.
- Which of the following statements is FALSE regarding a rightward shift in the hemoglobin-oxygen dissociation curve? A) Affinity for oxygen is increased. B) Oxygen loading onto the hemoglobin is increased. C) Hemoglobin is more saturated at a given PO2. D) It can be caused by a decrease in temperature. E) It can be caused by a decrease in blood pH.Which of the following statements is FALSE regarding a leftward shift in the hemoglobin-oxygen dissociation curve? A) Affinity for oxygen is increased. B) Oxygen loading onto the hemoglobin is increased. C) Hemoglobin is more saturated at a given PO2. D) It can be caused by a decrease in temperature. E) It can be caused by a decrease in blood pH.Which one of the following statements concerning Hb (hemoglobin) A1c is CORRECT? Question 4 options: a) HbA1c contains glucose molecules b) The concentration of HbA1c in the red blood cells (RBCs) decreases as RBCs age in the circulation c) Insulin injection can decrease the amount of HbA1c in the blood d) Weight is correlated with HbA1c concentration
- Which of the following concerning hemoglobin is true? a) BPG decreases at high altitudes and causes more O2 offloading in tissues b) As pH increases, [CO2] increases in tissues, causing more O2 release in tissue c) The R state is stabilized by CO2 binding, whereas the T state is stabilized by O2 binding d) About 38% of oxygen dissociates from hemoglobin in tissues e) Hemoglobin has a higher affinity for oxygen than carbon monoxide My guess is D.Which of the following concerning hemoglobin is true? a) BPG decreases at high altitudes and causes more O2 offloading in tissues b) As pH increases, [CO2] increases in tissues, causing more O2 release in tissue c) The R state is stabilized by CO2 binding, whereas the T state is stabilized by O2 binding d) About 38% of oxygen dissociates from hemoglobin in tissues e) Hemoglobin has a higher affinity for oxygen than carbon monoxide My guess is D. What following statement is TRUE concerning motifs and domains? a) Both motifs and domains are independently stable. b) Domains undergo dynamic individual changes that affect the entire protein c) B-a-ß loops, B barrels, and helix-turn-helix structure are types of domains d) Motifs and domains are part of secondary structural elements e) Ab initio computations predict motif folds accurately a majority of the time My guess is B. Which of the following is TRUE under the following conditions: an enzyme displaying Michaelis-Menten kinetics…Progressive hemothorax does not include() A) Abnormal respiratory movement B) Progressive increase of intrapleural pressure C) Venous pressure increased, heart beat weak, arterial pressure decreased D) Mediastinal flutter during breathing E) The blood volume of thoracic drainage was more than 200 ml / h for 3 hours
- 10) The heme group in myoglobin has a lower affinity for carbon monoxide as compared to free heme. What statement below best explains this observation? a) Myoglobin lowers the pH around the heme group. b) Myoglobin has negatively charged groups around the heme group. c) Heme is buried in the core of myoglobin making the heme inaccessible. d) Steric hindrance around the heme group caused by R groups in myoglobin. e) The iron ion of free heme is replaced with a copper ion in myoglobin.Erythroblastosis fetalis is caused by a) the second exposure b) bacterial infection c) viral infection d) bad luck e) the mother is astrologically incompatible with the faterWith the Bohr effect, more oxygen is released because a(n)____. a) increase in pH(alkalosis) strengthens the hemoglobin-oxygen bond b) increase in pH(alkalosis) weakens the hemoglobin-oxygen bond c) decrease in pH (acidosis) weakens the hemoglobin-oxygen bond d) decrease in pH (acidosis) strengthens the hemoglobin-oxygen bond