Which of the following is an essential role of calcium?
Blood clotting
Acid buffering
Extracellular osmotic pressure
ATP production
The Correct Answer is A
A. Calcium plays a critical role in blood clotting. It is involved in the coagulation cascade and is necessary for the activation of clotting factors that help stop bleeding.
B. Calcium is not involved in acid buffering. This function is primarily carried out by buffers such as bicarbonate in the blood.
C. While calcium does help regulate some functions of cells and tissues, it does not primarily contribute to extracellular osmotic pressure; this is more a function of proteins and other ions.
D. ATP production mainly occurs in mitochondria and is driven by the metabolism of glucose and fatty acids, not by calcium directly. Calcium does, however, play a role in cellular processes like muscle contraction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Oogenesis is the process of meiosis that leads to the formation of egg cells (ova). It involves the reduction of chromosome number by half, resulting in haploid egg cells, which are essential for reproduction.
B. The ovaries are the organs where oogenesis takes place, but they are not the process itself. They contain the oocytes and other structures involved in female reproduction.
C. Oocytes are the immature egg cells present in the ovaries before they undergo meiosis and maturation during oogenesis. They are the precursors to mature egg cells but do not describe the process.
D. Ovulation is the release of a mature egg cell from the ovary, which occurs after oogenesis is complete and the egg is ready for fertilization, but it is not the process of meiosis itself.
Correct Answer is C
Explanation
A. The heart is composed of cardiac muscle tissue, not smooth muscle. Cardiac muscle is specialized for rhythmic contractions to pump blood.
B. The rectus abdominis is composed of skeletal muscle tissue, which is voluntary and allows for movement of the trunk.
C. The esophagus contains smooth muscle tissue in its walls, which is responsible for the involuntary contractions (peristalsis) that move food from the mouth to the stomach.
D. The pectoralis major is composed of skeletal muscle tissue, which allows for voluntary control of arm movements.
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.