Which mineral is present in hemoglobin to facilitate oxygen transport?
Calcium (Ca+)
Sodium (Na+)
Iron (Fe+)
Potassium (K+)
The Correct Answer is C
A. Calcium (Ca⁺): This mineral plays roles in bone strength, muscle contraction, and clotting but is not involved in oxygen binding in hemoglobin.
B. Sodium (Na⁺): Sodium helps regulate fluid balance and nerve signaling, but it does not participate in oxygen transport.
C. Iron (Fe⁺): Iron within the heme groups of hemoglobin binds reversibly with oxygen, allowing red blood cells to transport it throughout the body.
D. Potassium (K⁺): Potassium maintains cell membrane potential and nerve conduction, not oxygen binding.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Connective tissue that connects bone to bone: This describes a ligament, which links bones at a joint, not a tendon.
B. Connective tissue that covers muscles: Muscle coverings are layers like the epimysium or fascia; tendons are not the general covering of muscle.
C. Connective tissue that covers nerves: Nerves are wrapped by sheaths such as the epineurium and perineurium; tendons serve a different function.
D. Connective tissue that connects muscle to bone: Tendons are dense, collagen-rich structures that transmit the force of muscle contraction to bone.
Correct Answer is A
Explanation
A. Type AB: Individuals with AB blood express both A and B antigens and generally do not have anti-A or anti-B antibodies, allowing receipt of A, B, AB, or O blood (AB is the universal recipient in the ABO system).
B. Type B: Type B blood has B antigen and anti-A antibodies, so it cannot safely receive blood containing A antigen.
C. Type A: Type A blood has A antigen and anti-B antibodies, so it cannot safely receive blood containing B antigen.
D. Type O: Type O blood lacks A and B antigens (making it a universal donor for ABO), but it contains both anti-A and anti-B antibodies, so recipients with other ABO types can react to it.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.