Nokea
When the oxygen supply to the tissues is inadequate, the condition is
- A. Hypoxia
- B. Asphyxia
- C. Pleurisy
- D. Anoxia
Correct Answer: A
Rationale: The correct answer is A: Hypoxia. Hypoxia refers to inadequate oxygen supply to the tissues, leading to tissue damage. Asphyxia is a condition of suffocation due to lack of oxygen supply. Pleurisy is inflammation of the lining of the lungs, not directly related to oxygen supply. Anoxia is a severe form of hypoxia where there is complete deprivation of oxygen to the tissues. In this context, hypoxia best describes the condition of inadequate oxygen supply to the tissues.
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Blocking afferent action potentials from the chemoreceptors in the carotid and aortic bodies would interfere with the brain's ability to regulate breathing in response to
- A. changes in PCO2
- B. changes in PCO2
- C. changes in pH
- D. changes in blood pressure
Correct Answer: B
Rationale: The correct answer is B: changes in PCO2. Chemoreceptors in the carotid and aortic bodies detect levels of oxygen, carbon dioxide, and pH in the blood. Blocking afferent action potentials from these chemoreceptors would specifically interfere with detecting changes in PCO2, as these receptors primarily respond to alterations in CO2 levels. This interference would disrupt the brain's ability to regulate breathing in response to changes in PCO2, leading to potential respiratory problems. Choices A and C are incorrect because chemoreceptors primarily respond to CO2 levels, not O2 or pH. Choice D is incorrect because changes in blood pressure are primarily detected by baroreceptors, not chemoreceptors in the carotid and aortic bodies.
Foetal hemoglobin has great affinity than adult hemoglobin because
- A. It binds 2,3 DPG less avidity by Gamma polypeptide chain than HbA
- B. Its concentration is very high
- C. Foetal blood gets oxygen from the mother
- D. Its polypetide chains bind very fast with Oxygen
Correct Answer: A
Rationale: The correct answer is A because 2,3 DPG binds less avidly to the Gamma polypeptide chain in foetal hemoglobin, resulting in a higher affinity for oxygen. This is due to structural differences between foetal and adult hemoglobin. Choice B is incorrect as high concentration alone does not determine affinity. Choice C is incorrect as the source of oxygen does not affect hemoglobin's affinity. Choice D is incorrect as the speed of oxygen binding does not necessarily correlate with affinity.
Palpation is the assessment technique used to find which abnormal assessment findings?
- A. Stridor
- B. Finger clubbing
- C. Tracheal deviation
- D. Limited chest expansion
Correct Answer: D
Rationale: The correct answer is D because limited chest expansion is one of the abnormal assessment findings that can be identified through palpation techniques.
The amount of air that moves in and out of the lungs, with each normal inspiration and expiration is called
- A. Residual volume
- B. Vital capacity
- C. Tidal volume
- D. Tidal capacity
Correct Answer: C
Rationale: The correct answer is C: Tidal volume. Tidal volume is the amount of air that moves in and out of the lungs during normal breathing. This volume represents the normal breathing pattern and is essential for gas exchange in the lungs. Residual volume (A) is the air that remains in the lungs after maximal expiration. Vital capacity (B) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. Tidal capacity (D) is not a recognized term in respiratory physiology. Therefore, the correct choice is C as it specifically refers to the air moved during normal breathing.
Cloacal respiration is found in
- A. Snake
- B. Turtle and Tortoise
- C. Crocodile
- D. Frog
Correct Answer: B
Rationale: Cloacal respiration is found in turtles and tortoises. These reptiles can absorb oxygen through their cloaca, a multi-functional opening used for excretion and reproduction. Turtles and tortoises lack specialized respiratory organs like lungs, and thus utilize cloacal respiration as an additional means of obtaining oxygen. Snakes (Option A) primarily rely on lung respiration. Crocodiles (Option C) have well-developed lungs for breathing. Frogs (Option D) respire through their skin and lungs but do not utilize cloacal respiration like turtles and tortoises. Therefore, the correct answer is B, as it is the only species listed that exhibits cloacal respiration.