Which of the following is true regarding normal quiet expiration of air?
It depends on the complete lack of surface tension on the alveolar wall.
It is driven by increased blood CO2 levels.
It is a passive process that depends on the relaxation of inspiratory muscles.
It requires contraction of abdominal wall muscles.
The Correct Answer is C
A. It depends on the complete lack of surface tension on the alveolar wall: Alveoli have surface tension; pulmonary surfactant reduces surface tension but does not eliminate it. Quiet expiration does not require an absence of surface tension.
B. It is driven by increased blood CO₂ levels: Elevated CO₂ increases the drive to breathe (affects ventilation rate), but quiet expiration itself is not actively driven by CO₂ -it is passive.
C. It is a passive process that depends on the relaxation of inspiratory muscles: Quiet expiration occurs when the diaphragm and external intercostals relax and elastic recoil of the lungs and chest wall returns air to atmosphere.
D. It requires contraction of abdominal wall muscles: Abdominal muscle contraction is used for forced expiration (e.g., coughing or heavy exercise), not normal quiet expiration.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Tubular secretion involves the reabsorption of substances from the renal tubules into the peritubular capillaries.: That describes reabsorption, the opposite of secretion.
B. Tubular secretion is a passive process that occurs in the glomerulus, allowing the filtration of waste products.: Filtration in the glomerulus is a separate, largely passive process; tubular secretion is an active transport process occurring in the renal tubules.
C. Tubular secretion is the movement of substances from the blood in the peritubular capillaries into the renal tubules.: This correctly describes tubular secretion (e.g., H⁺, K⁺, drugs) .
D. Tubular secretion primarily occurs in the Bowman's capsule, facilitating the selective reabsorption of essential nutrients.: Bowman's capsule is the site of filtration, not tubular secretion; selective reabsorption occurs later in the tubules.
Correct Answer is A
Explanation
A. Regulating body temperature of the testes:Correct -the scrotum suspends the testes and adjusts their position to keep testicular temperature slightly below core body temperature, which is necessary for optimal sperm production.
B. Storing urine:Incorrect -urine is stored in the urinary bladder, not in the scrotum.
C. Producing sperm: Incorrect -sperm are produced in the seminiferous tubules inside the testes; the scrotum is a protective/powerful thermoregulatory sac, not the sperm-producing tissue.
D. Carrying sperm to the urethra: Incorrect -ducts such as the vas (ductus) deferens carry sperm toward the urethra; the scrotum does not transport sperm.
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.