How is most oxygen transported in the blood?
Correct answer: B. Attached to haemoglobin in red blood cells
- A. Dissolved freely in the plasma
- B. Attached to haemoglobin in red blood cells
- C. Combined with bicarbonate ions in plasma
- D. Stored inside the alveolar air spaces
Explanation
Most oxygen binds reversibly to haemoglobin, forming oxyhaemoglobin. Only a small amount is dissolved directly in plasma; bicarbonate is the main transport form of carbon dioxide.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Respiratory System
The respiratory system includes the air passages, lungs, pleura, alveoli and the mechanics of breathing. It explains pulmonary ventilation, gas exchange, oxygen and carbon dioxide transport, regulation of breathing, and the difference between external respiration in the lungs and internal respiration in body tissues.
Practise Respiratory System
40 free Respiratory System MCQs from Anatomy and Physiology for Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Anatomy and Physiology for Nursing questions like this
Anatomy and Physiology for Nursing is on 4 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Respiratory System questions
A patient is breathing very slowly after receiving an opioid analgesic and is difficult to arouse. Which action should the nurse take first?
Which statement correctly describes external respiration?
Which change occurs during normal inspiration?
Which substance produced by type II alveolar cells helps prevent alveolar collapse?
Which statement about carbon dioxide transport is correct?
A nurse explains that the medulla responds strongly when carbon dioxide rises in the blood. What directly stimulates this response in the brain and cerebrospinal fluid?