Nokea
Which muscle(s) produce(s) the movement labeled '1'?
- A. rectus abdominis
- B. internal intercostals
- C. external intercostals
- D. diaphragm
Correct Answer: C
Rationale: The correct answer is C: external intercostals. These muscles are responsible for elevating the ribcage during inhalation, which corresponds to the movement labeled '1'. The rectus abdominis (A) is involved in trunk flexion, internal intercostals (B) aid in forced exhalation, and the diaphragm (D) primarily assists in inhalation by moving downward to increase thoracic cavity volume. Therefore, the external intercostals are the correct choice for the specific movement indicated in the question.
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Most of the carbon dioxide in the blood is transported as
- A. solute dissolved in the plasma
- B. carbaminohemoglobin
- C. bicarbonate ions
- D. solute dissolved in the cytoplasm of red blood cells
Correct Answer: C
Rationale: The correct answer is C: bicarbonate ions. Carbon dioxide in the blood mainly combines with water to form carbonic acid, which dissociates into bicarbonate ions and hydrogen ions. The majority of carbon dioxide is transported in the blood as bicarbonate ions. This process occurs in red blood cells via the enzyme carbonic anhydrase. Choices A and D are incorrect as carbon dioxide mainly combines with water and does not remain as a solute in plasma or cytoplasm. Choice B, carbaminohemoglobin, is a minor way carbon dioxide is transported, where a small amount binds to hemoglobin, but the majority is transported as bicarbonate ions.
Aminophylline (theophylline) is prescribed for a client with acute bronchitis. A nurse administers the medication, knowing that the primary action of this medication is to?
- A. Promote expectoration.
- B. Suppress the cough.
- C. Relax smooth muscles of the bronchial airway.
- D. Prevent infection.
Correct Answer: C
Rationale: The correct answer is C: Relax smooth muscles of the bronchial airway. Aminophylline (theophylline) is a bronchodilator that works by relaxing the smooth muscles in the bronchial airways, which helps to open up the airways and improve airflow. This action helps to relieve bronchospasm, which is common in conditions like acute bronchitis. Promoting expectoration (A) and suppressing cough (B) are not the primary actions of aminophylline, although they may be secondary effects. Preventing infection (D) is unrelated to the mechanism of action of aminophylline in treating acute bronchitis.
Rectal respiration is seen in
- A. Cockroach
- B. Spider
- C. Niads of Dragon fly
- D. Water flea
Correct Answer: C
Rationale: Rectal respiration in insects involves the exchange of gases through the anus. The correct answer is C, Niads of Dragonfly, as they have specialized structures called rectal gills for respiration. Cockroach (A), Spider (B), and Water flea (D) do not possess rectal gills or exhibit rectal respiration. Cockroaches have spiracles for respiration, spiders have book lungs or tracheal systems, and water fleas have gills located elsewhere on their bodies. Thus, only Niads of Dragonfly demonstrate rectal respiration, making it the correct choice.
oropharynx contain
- A. palatine tonsils
- B. lingual tonsils
- C. Pharyngeal tonsils
- D. a and b
Correct Answer: D
Rationale: The correct answer is D because the oropharynx contains both palatine tonsils (choice A) and lingual tonsils (choice B). Palatine tonsils are located on the sides of the oropharynx and lingual tonsils are located at the base of the tongue. Pharyngeal tonsils (choice C) are also known as adenoids and are located in the nasopharynx, not the oropharynx. Therefore, choices A, B, and C alone are incorrect. Choice D is correct because both palatine tonsils and lingual tonsils are present in the oropharynx.
Which dietary modification helps to meet the nutritional needs of patients with COPD?
- A. Eating a high-carbohydrate, low-fat diet
- B. Avoiding foods that require a lot of chewing
- C. Preparing most foods of the diet to be eaten hot
- D. Drinking fluids with meals to promote digestion
Correct Answer: B
Rationale: Patients with COPD may have difficulty chewing due to dyspnea, so avoiding foods that require a lot of chewing helps in meeting their nutritional needs. Choosing foods that are easier to eat can prevent fatigue during meals and ensure adequate nutrition intake.