The portion of the digestive tract in which digestion begins is the
A) oral cavity.
B) esophagus.
C) stomach.
D) duodenum.
E) jejunum.
Ans: A) oral cavity.
You might also like to view...
Which vertebrae contain transverse foramina?
A. Lumbar vertebrae only B. Cervical and thoracic vertebrae C. All vertebrae in the vertebral column contain transverse foramina. D. Thoracic vertebrae only E. Cervical vertebrae only
A red blood cell has a diameter of about 8?m. Use that information to estimate the diameter of the oocyte in micrometers (?m) and millimeters (mm). (1 mm = 1000 ?m)
A) An oocyte has a diameter about 2 times greater than the red blood cell. B) An oocyte has a diameter about 4 times greater than the red blood cell. C) An oocyte has a diameter about 7 times greater than the red blood cell. D) An oocyte has a diameter about 11 times greater than the red blood cell. E) An oocyte has a diameter about 15 times greater than the red blood cell.
In contrast to the constant high temperature in the __________, the temperature within the __________ is generally cooler and may vary substantially
Fill in the blank(s) with correct word
A 55-year-old woman develops a hiatal hernia in which the fundus of the stomach protrudes through the esophageal hiatus of the diaphragm into the thorax. Which of the following structures is/are at greatest risk of injury during surgical repair of this hernia?
(A) Thoracicduct (B) Azygosvein (C) Vagus nerves (D) Sympathetic chains (E) Superior epigastric vessels