Description : Which of the following statement(s) is/are true concerning carbon dioxide kinetics? a. The amount of carbon dioxide produced is equivalent to the amount of oxygen consumed b. Carbon dioxide levels ... tissues d. The amount of carbon dioxide excreted is a function of ventilation of perfused alveoli
Last Answer : Answer: a, c, d The total amount of carbon dioxide produced by systemic metabolism is roughly equivalent to the amount of oxygen consumed (100-120 cc/m2/min, 200 cc/min in a typical ... carbon dioxide excreted is a function of ventilation of perfused alveoli (i.e. the alveolar ventilation/min).
Description : Is carbon dioxide transported in the blood by plasma hemoglobin and bicarbonate ions?
Last Answer : Need answer
Description : Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as (a) bicarbonate in blood plasma and RBCs (b) free CO2 in blood plasma (c) 70% carbamino-haemoglobin and 30% as bicarbonate (d) carbamino-haemoglobin in RBCs.
Last Answer : (a) bicarbonate in blood plasma and RBCs
Description : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant duri
Last Answer : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal ... durign day time, and the other at night.
Description : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above ... Both processes can happen together because the diffusion coefficient of water and CO2 is different
Last Answer : (d) Both processes can happen together because the diffusion coefficient of water and CO2 is different
Description : The partial pressure of oxygen in the alveoli of the lungs is (a) equal to that in the blood (b) more than that in the blood (c) less than that in the blood (d) less than that of carbon dioxide.
Last Answer : (b) more than that in the blood
Description : Carbon dioxide is transported from tissues to respiratory surface by only (a) plasma and erythrocytes (b) plasma (c) erythrocytes (d) erythrocytes and leucocytes
Last Answer : (a) plasma and erythrocytes
Description : Which one of the following is one of the paths followed by air or O2 during respiration in the adult male Periplaneta americana as it enters the animal body? (a) Spiracle in ... prothorax, tracheoles, trachea, oxygen diffuses into cells (d) Hypopharynx, mouth, pharynx, trachea, tissues
Last Answer : (a) Spiracle in metathorax, trachea, tracheoles, oxygen diffuses into cells
Description : Carbon monoxide is a poisonous gas for one of the following reasons. w) it is a powerful acid anhydride x) it combines with the hemoglobin of the blood y) it depletes the dissolved oxygen in the blood by forming carbon dioxide z) it is a strong oxidizing agent
Last Answer : ANSWER: X -- IT COMBINES WITH THE HEMOGLOBIN OF THE BLOOD
Description : Partial pressure of carbon dioxide in Alveoli , atmospheric air and tissures will be `:-`
Last Answer : Partial pressure of carbon dioxide in Alveoli , atmospheric air and tissures will be `:-` A. 0.3,40,45 B. 40,0.3,45 C. 0.3,104,28 D. 104,159,40
Description : Which of the following statement(s) is/are true concerning CO2 transfer in the lung? a. Carbon dioxide excretion is a direct function of alveolar ventilation b. Normally end tidal ... d. Positive pressure ventilation under normal airway pressures creates a significant end tidal PaCO2 gradient
Last Answer : Answer: a, b, c The amount of carbon dioxide excretion is directly related to alveolar ventilation. While oxygenation is a function of matching blood flow to alveoli, carbon dioxide excretion is ... high (over 30 cm H2O) and the compression volume is a significant component of each exhaled breath
Description : Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present as
Last Answer : Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present as A ... . `70%` carbamino-haemoglobin and `30%` as bicarbonate
Description : The bubbles in Chanmpagne and Soda are - (1) Nitrogen (2) Oxygen (3) Carbon dioxide (4) Hydrogen
Last Answer : (4) Hydrogen
Description : When Calcium reacts with water it starts floating on top of water because A) bubbles of carbon dioxide formed stick to the surface of metal B) bubbles of hydrogen formed stick to the surface of metalC) Calcium is lighter than water D) None of the above
Last Answer : B) bubbles of hydrogen formed stick to the surface of metal
Description : Carbon dioxide entering the red blood corpuscles from the tissues is partially taken up by haemoglobin to form (a) carboxyhaemoglobin (b) carbonylhaemoglobin (c) carbaminohaemoglobin (d) carbomoylhaemoglobin
Last Answer : Ans:(a)
Description : Minute, circular discs floating in the blood, which carry oxygen to the tissues, and carbon dioxide away from them, are called (a) White blood corpuscles (WBC) (b) Red blood corpuscles (RBC) (c) Monophylls (d) Erythrocytes
Last Answer : Ans:(b)
Description : The function of the heart is to (1) Supply oxygen to the tissues (2) carry carbon dioxide from the tissues (3) throw away waste materials (4) pump blood to different parts of the body
Last Answer : pump blood to different parts of the body
Description : What does make the blood look red? A. Red corpuscle B. Hemoglobin C. Plasma D. Certain secretions
Last Answer : ANSWER: B
Description : Which are unites used to express volume?
Last Answer : liter and cubic centimeter
Description : Which of the following statement(s) is/are true concerning translation of the mRNA message to protein synthesis? a. An adaptor molecule, tRNA, recognizes specific nucleic acid bases and unites them ... and the free amino acid occurs in the free cytoplasm d. Complete protein synthesis takes hours
Last Answer : Answer: a, b The synthesis of protein involves conversion from a four-letter nucleotide language to one of 20 chemically distinct amino acids. This process is referred to as ... translation and be moving down the mRNA molecules simultaneously, thus increasing the rate of protein synthesis
Description : Upon the entry of carbon dioxide in the red blood cells, H+ionsare formed at a very rapid rate, and yet the blood does not turn acid because (a) H+ ions are rapidly exchanged at the ... haemoglobin and plasma (d) H+ ions are buffered by proteins of haemoglobin and proteins and phosphates of plasma
Last Answer : Ans:(c)
Description : With regard to the transport of carbon dioxide in blood: a. 25% of carbon dioxide is dissolved in blood b. carbonic anhydrase is found in plasma c. 50% of carbon dioxide is carried as bicarbonate d. deoxygenated haemoglobin facilitates the transport of carbon dioxide
Last Answer : deoxygenated haemoglobin facilitates the transport of carbon dioxide
Description : Carbon dioxide in blood: a. is more soluble than oxygen b. is carried in combination with plasma c. carries mainly as bicarbonate ions d. all
Last Answer : all
Description : The carbon dioxide is transported via blood to lungs mostly (a) in combination with haemoglobin only (b) dissolved in blood plasma (c) in the form of bicarbonate ions (d) as carbamino-haemoglobin and as carbonic acid.
Last Answer : (c) in the form of bicarbonate ions
Description : Which gas enters the bloodstream through the lungs binds to hemoglobin and reduces the amount of exygen that reaches the body's organs and tissues?
Last Answer : Carbon monoxide
Description : After re leas ing O2 at the tissues, hemoglobin transports (A) CO2 and protons to the lungs (B) O2 to the lungs (C) CO2 and protons to the tissue (D) Nutrients
Last Answer : Answer : A
Description : How different are oxyhemoglobin and hemoglobin?Where is it expected to find a higher concentration of oxyhemoglobin, in peripheral tissues or in the lungs?
Last Answer : Oxygen-bound hemoglobin is called oxyhemoglobin. In the lungs the oxygen concentration is higher and so there is a higher oxyhemoglobin concentration. In the peripheral tissues the situation is the ... lower and there is more free hemoglobin. The Circulatory System - Image Diversity: oxyhemoglobin
Description : How carbon monoxide, emitted by automobiles, prevents transport of oxygen in the body tissues? (a) By forming a stable compound with haemoglobin (b) By obstructing the reaction of oxygen with haemoglobin (c) By changing oxygen into carbon dioxide (d) By destroying the haemoglobin
Last Answer : (a) By forming a stable compound with haemoglobin
Description : What scientist studies microscopic forms of life?
Last Answer : A microbiologist studies microscopic forms of life.
Description : Televised educational programme is useful because (a) It can present the natural phenomenon of the world in natural form (b) It can magnify the microscopic forms of life and can be presented on TV ... audience in the same auditorium or in different locations to view it clearly (d) all of these
Last Answer : c) It affords the opportunity for large audience in the same auditorium or in different locations to view it clearly
Description : All the following statements regarding calcium are correct except (A) It diffuses as a divalent cation (B) It freely diffuses across the endoplasmic reticulum of muscle cells (C) It can exist in the blood as ionic form and also protein bound (D) It is found in high concentration in bones
Last Answer : Answer : B
Description : How is carbon dioxide released by cellular respiration transported from the tissues to be eliminated through the lungs?
Last Answer : In vertebrates almost 70% of the carbon dioxide is transported by the blood in the form of bicarbonate, 25% bound to hemoglobin and 5% dissolved in the plasma.
Description : Silver nitrate solution when added to a colorless aqueous solution E forms a white precipitate which dissolves in excess of E. If the white precipitat
Last Answer : Silver nitrate solution when added to a colorless aqueous solution E forms a white precipitate which dissolves in excess ... SO_(3)` D. `Na_(2)SO_(4)`
Description : Radium is a radioactive substance. It dissolves in dilute `H_(2)SO_(4)` and forms a compound radium sulphate. The compound is a)No longer radioactive
Last Answer : Radium is a radioactive substance. It dissolves in dilute `H_(2)SO_(4)` and forms a compound ... content D. twice as radioactive as the radium content
Description : Methanol cannot be dried with anhydrous CaCl2 because - (1) CaCl2 dissolves in it (2) it is not good dehydrating agent (3) it forms a solid CaCl2 × 4CH3OH (4) it reacts with CH3OH
Last Answer : (3) it forms a solid CaCl2 × 4CH3OH
Description : During osmosis w) Pure solvent diffuses through a membrane but solutes do not. x) Pure solutes diffuse through a membrane but solvent does not. y) Pure solvent and a solution both diffuse at the same time through a membrane. z) Gases diffuse through a membrane into a solution and build up pressure.
Last Answer : ANSWER: W -- PURE SOLVENT DIFFUSES THROUGH A MEMBRANE BUT SOLUTES DO NOT.
Description : Which of the following product of PIP`""_(2)` diffuses into the cytoplasm triggering the release of `Ca^(2+)` for intracellular calcium-mediated proce
Last Answer : Which of the following product of PIP`""_(2)` diffuses into the cytoplasm triggering the release of `Ca^(2 ... `IP_3` B. DG C. cAMP D. Protein kinase
Description : What molecule diffuses into the chloroplast that is needed for the Calvin cycle?
Last Answer : What is the answer ?
Description : Bitumen completely dissolves in (A) Carbon bisulphide (B) Chloroform (C) Coal tar (D) All of these
Last Answer : Answer: Option D
Description : Why nitrogen diffuses faster in high temperature?
Last Answer : Higher temperatures mean more heat energy which translates intomore kinetic energy of the molecules of nitrogen gas. This greaterkinetic energy allows the molecules to diffuse faster than at alower temperature and lower kinetic energy.
Description : Oxygen diffuses through this structure, but a sodium ion may need active transport. Which structure is this statement most likely referring to?
Last Answer : A semipermeable membrane (APEX)
Description : Hydrogen diffuses . . . . . . . . . . chlorine (a) Faster than (b) Slower than (c) At the same rate as (d) None of these
Description : Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical ... x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.
Last Answer : ANSWER: Z -- SLIGHTLY LIGHTER THAN URANIUM-238.
Description : On a dry day, water diffuses out of the intercellula spaces of the leaf through what part of the leaf?
Last Answer : ANSWER: STOMATA
Description : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. Plants absorb `CO_(2)` during photosynthesis. In pre
Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)` ... 4246.5 years B. 5384 yrs C. 4628 yrs D. 2684 yrs
Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2)`. ... A. 4246 yrs B. 4624 yrs C. 4628 yrs D. 6248 yrs
Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and `.^(14)CO_(2) ... H_(2)O` and `CO_(2)` D. mechanism is not confirmed
Last Answer : In the atmosphere, carbon dioxide is found in two forms, i.e., `.^(12)CO_(2)` and ` ... nitrogen by cosmic ray neutrons D. none of the above