Why do the walls of capillaries consist of only one layer?
This allows for rapid exchange of oxygen and nutrients.
This allows for red blood cell formation to occur.
There is no blood pressure within the capillaries.
Blood does not travel through capillaries.
The Correct Answer is A
A. This allows for rapid exchange of oxygen and nutrients: Capillaries have thin walls (one cell thick) to facilitate the rapid diffusion of gases (oxygen and carbon dioxide), nutrients, and waste products between blood and tissues.
B. This allows for red blood cell formation to occur: Red blood cells are formed in the bone marrow, not in capillaries.
C. There is no blood pressure within the capillaries: There is still blood pressure within capillaries, although it is lower than in arteries, so this is incorrect.
D. Blood does not travel through capillaries: Blood does indeed travel through capillaries as part of the circulatory system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. It protects the lungs from overinflating: While protective reflexes (like the Hering-Breuer reflex) exist to prevent overinflation, this is primarily a function of the lungs and the medulla, not directly the hypothalamus.
B. It modifies the medulla oblongata's functions: The hypothalamus influences the medulla oblongata, which controls the basic rhythm and rate of breathing, allowing the body to adjust ventilation in response to emotional states, temperature changes, and other stimuli.
C. It maintains the basic rhythm of breathing: The basic rhythm of breathing is primarily generated by the medulla oblongata and pons, while the hypothalamus modulates these functions rather than maintaining them directly.
D. It monitors the respiration rate in sleep and awake states: While the hypothalamus does play a role in the sleep-wake cycle, the actual monitoring of respiration rate is managed by the respiratory centers in the brainstem (medulla and pons).
Correct Answer is D
Explanation
A. Gametes are only found in males: This statement is incorrect; gametes (sperm and eggs) are found in both males and females.
B. Gametes have double the chromosomes: This is incorrect; gametes are haploid (having half the number of chromosomes), while somatic cells are diploid (having two sets of chromosomes).
C. Gametes do not go through cell division: Gametes are produced through meiosis, which is a type of cell division.
D. Gametes go through meiosis: Gametes are produced through meiosis, a specialized form of cell division that reduces the chromosome number by half, allowing for sexual reproduction.
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.