A sphincter is

a. A ring of muscle around a tubular organ which controls passage of contents
b. A flap of tissue which prevents food entering the nasal cavity
c. A structure which prevents fluid entering the lungs
d. A tissue which secretes enzymes into the stomach


Ans: a

Nursing

You might also like to view...

A nurse is assessing the apical heart rate of a healthy person. In order to hear the heart beats loud and clear, where should the nurse place the stethoscope?

A) Slightly below the left nipple B) Over the sternum at the midpoint between the nipples C) Four inches below the left clavicle D) On the center of the rib cage

Nursing

Which of the following is the most prevalent contributing factor toward the incidence of mental disorders in the child?

A) Financial B) Parental divorce C) Environmental D) Genetic

Nursing

When collecting data on a child diagnosed with diabetes

mellitus, the nurse notes that the child has had weight loss and other symptoms of the disease. Which fasting blood glucose level would the nurse expect this child to have? A) 60 mg/dL B) 120 mg/dL C) 180 mg/dL D) 240 mg/dL

Nursing

When a nurse attempts to provide health-care services to the homeless, what should be a realistic concern?

A. Most individuals who are homeless reject help. B. Most individuals who are homeless are suspicious of anyone who offers help. C. Most individuals who are homeless are proud and will often refuse charity. D. Most individuals who are homeless relocate frequently.

Nursing