CAMPBELL BIOLOGY MOD MASTERING (18 WEEK)
12th Edition
ISBN: 9780136920335
Author: Urry
Publisher: PEARSON
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Chapter 42, Problem 4TYU
When you hold your breath, which of the following blood gas changes first leads to the urge to breathe?
- (A) rising O2
- (B) falling O2
- (C) rising CO2
- (D) falling CO2
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When you hold your breath, which of the following blood gaschanges first leads to the urge to breathe?(A) rising O2(B) falling O2(C) rising CO2(D) falling CO2
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Which of the following is not true with regards to the oxygen-hemoglobin curve?
Chapter 42 Solutions
CAMPBELL BIOLOGY MOD MASTERING (18 WEEK)
Ch. 42.1 - Prob. 1CCCh. 42.1 - Three-chambered hearts with incomplete septa were...Ch. 42.1 - Prob. 3CCCh. 42.2 - Explain why blood has a higher 02 concentration in...Ch. 42.2 - Prob. 2CCCh. 42.2 - Prob. 3CCCh. 42.3 - Prob. 1CCCh. 42.3 - Prob. 2CCCh. 42.3 - Prob. 3CCCh. 42.4 - Explain why a physician might order a white cell...
Ch. 42.4 - Prob. 2CCCh. 42.4 - Prob. 3CCCh. 42.4 - Prob. 4CCCh. 42.5 - Why is an internal location for gas exchange...Ch. 42.5 - Prob. 2CCCh. 42.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 42.6 - Prob. 1CCCh. 42.6 - Prob. 2CCCh. 42.6 - Prob. 3CCCh. 42.7 - What determines whether O2 and CO2 undergo net...Ch. 42.7 - How does the Bohr shift help deliver O2 to very...Ch. 42.7 - Prob. 3CCCh. 42 - How does the flow of a fluid in a closed...Ch. 42 - Prob. 42.2CRCh. 42 - Prob. 42.3CRCh. 42 - Prob. 42.4CRCh. 42 - Prob. 42.5CRCh. 42 - How does air in the lungs differ from the fresh...Ch. 42 - How are the roles of a respiratory pigment and an...Ch. 42 - Prob. 1TYUCh. 42 - Blood returning to the mammalian heart in a...Ch. 42 - Prob. 3TYUCh. 42 - When you hold your breath, which of the following...Ch. 42 - Prob. 5TYUCh. 42 - Prob. 6TYUCh. 42 - Prob. 7TYUCh. 42 - DRAW IT Plot blood pressure against time for one...Ch. 42 - EVOLUTION CONNECTION One opponent of the movie...Ch. 42 - Prob. 10TYUCh. 42 - Prob. 11TYUCh. 42 - WRITE ABOUT A THEME: INTERACTIONS Some athletes...Ch. 42 - Prob. 13TYU
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- What is the effect of the following changes on the O2 affinity of myoglobin and hemoglobin? (a) A drop in the pH of blood plasma from 7.4 to 7.2. (b) A decrease in the partial pressure of CO2 in the lungs from 6 kPa (holding one’s breath) to 2 kPa (normal). (c) An increase in the BPG level from 5 mM (normal altitudes) to 8 mM (high altitudes).arrow_forwardHow will the lungs compensate for an acute rise in the partial pressure of CO2 in arterial blood? (1 Sentence MAX- no more than 10 words)arrow_forwardSome Events Related to Breathing 1 increased rate of breathing 2 Nervous stimulation of the diaphragm 3 Increased concentration of CO 2 in the blood 4 Decreased concentration of CO 2 in the blood 5 Chemical stimulation of the respiratory centre The sequence of events that occurs as the breathing rate is increased Is a) 3,5,2,1 and 4 b) 5,3,1,2 and 4 c) 3,2,4,1 abd 5 d) 4,3,5,2 and 1arrow_forward
- (a) The partial pressure of CO2 in the lungs can be varied rapidly by the rate and depth of breathing. For example, a common remedy to alleviate hiccups is to increase the concentration of CO2 in the lungs. This can be achieved by holding one’s breath, by very slow and shallow breathing (hypoventilation), or by breathing in and out of a paper bag.Under such conditions, pCO2 in the air space of the lungs rises above normal. Qualitatively explain the effect of these procedures on the blood pH.(b) A common practice of competitive short-distance runners is to breathe rapidly and deeply (hyperventilate) for about half a minute to remove CO2from their lungs just before the race begins. Blood pH may rise to 7.60. Explain why the blood pH increases.(c) During a short-distance run, the muscles produce a large amount of lactic acid (CH2CH(OH)COOH; K2 = 1.38 × 10 –4 M) from their glucose stores. Why might hyperventilation before a dash be useful?arrow_forwardDaniel, the swimmer with the fastest time on the college swim team, routinely hyperventilates before a meet, as he says "to sock some more oxygen into my lungs so I can swim longer without having to breathe." "Furthermore, my heart won't have to adjust it's output". First of all, what basic fact about oxygen loading has Daniel forgotten (a lapse leading to false thinking)? Do you think that hyperventilation will provide him with enough oxygen to increase his endurance during the race?arrow_forwardJumping into cold water may initiate the “diving reflex,” during which blood is shunted toward the head and away from the limbs. Under these conditions, why might you be able to hold your breath for an extended period?arrow_forward
- When individuals are hyperventilating, they are told to breathe into a paper bag or into their cupped hands. (a) Explain why this increases blood carbon dioxide levels. (b) What will this do to the breathing rate?arrow_forward(a) Define hyperventilation. (b) If you hyperventilate, do you retain or expel more carbon dioxide? (c) What effect does hyperventilation have on blood pH?arrow_forwardDecreased arterial pH (increased hydrogen ion concentration in the arterial blood) increases depth and frequency of respirations Choose from the following: (A) directly stimulating central chemoreceptors within the fourth ventricle of the medulla oblongata (B) directly stimulates the glomus cells of the aortic and carotid sinuses (C) both A and Barrow_forward
- A 5-year-old child announces to her parents (former A&P students) that she is going to hold her breath until she is allowed to watch more television. The parents are not worried. (a) Explain why the parents are not worried. (b) Explain how the child’s blood carbon dioxide levels and blood hydrogen ion and bicarbonate ion levels change while she is holding her breath.arrow_forwardO E-If answers (1), (2), (3) and (4) are TRUE Which of the following is NOT true about the liver lobule? * (1) Bile canaliculi transport bile towards the bile ducts located at the corners of the liver lobule. (2) Sinusoidal capillaries drain into the central vein. (3) Liver lobules are capable of producing plasma proteins such as albumin. (4) The portal arteriole takes blood to the liver lobule, while the portal venule takes blood away from the liver lobule. O A - If answers (1), (2) and (3) are TRUE B - If answers (1) and (3) are TRUE O C- If answers (2) and (4) are TRUE O D- If only answer (4) is TRUE O E- If answers (1), (2), (3) and (4) are TRUE Which of the following is NOT true with regards the oxygen-hemoglobin dissociation curve? * 27°C ere to searcharrow_forwardExplain how the arterial PO2 and the oxygen content of whole blood are affected by (a) hyperventilation, (b) breathing from a tank containing 100% oxygen, (c) anemia (low red blood cell count and hemoglobin concentration), and (d) high altitude.arrow_forward
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