Large Intestine: Anatomy, Histology, Physiology
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which part of the large intestine does not have folds or villi?

  • Terminal ileum
  • Sigmoid colon
  • Descending colon
  • Rectum (correct)
  • Which artery supplies the proximal ascending colon?

  • Middle colic artery
  • Right colic artery (correct)
  • Ileocolic artery
  • Left colic artery
  • Which part of the large intestine is innervated by sympathetic nerves from T6-T12 and L1-L3?

  • Transverse colon (correct)
  • Sigmoid branches
  • Descending colon
  • Left colic artery
  • Which part of the large intestine has many deep crypts and intestinal glands in its mucosa?

    <p>Descending colon</p> Signup and view all the answers

    Which part of the large intestine has appendices epiploicae within the serosa?

    <p>Sigmoid colon</p> Signup and view all the answers

    Which part of the large intestine lacks absorbent villi but has simple columnar epithelium with many goblet cells?

    <p>Ascending colon</p> Signup and view all the answers

    Which of the following is a major anatomical component of the large intestine?

    <p>Appendix</p> Signup and view all the answers

    What is the function of mucin in the large intestine?

    <p>Add mucus to convert undigested material into feces</p> Signup and view all the answers

    What is the role of the sympathetic and parasympathetic nerves in the large intestine?

    <p>Parasympathetic nerves control submucosal blood flow</p> Signup and view all the answers

    What is the main function of the large intestine in producing SCFA, Vitamin K, and Biotin?

    <p>Convert Undigested Material into Feces</p> Signup and view all the answers

    Which reflex aids in moving material from the stomach into the large intestine?

    <p>Gastrocolic reflex</p> Signup and view all the answers

    What is the main clinical feature of Irritable Bowel Syndrome (IBS)?

    <p>Persistent Diarrhea</p> Signup and view all the answers

    What is the primary driver for water absorption in the large intestine?

    <p>Sodium absorption</p> Signup and view all the answers

    Which type of movement in the large intestine involves simultaneous contraction of smooth muscle over large areas?

    <p>Mass action contraction</p> Signup and view all the answers

    In which congenital disorder are ganglions absent in myenteric and submucosal plexuses in the distal colon?

    <p>Hirschsprung Disease</p> Signup and view all the answers

    Which reflex allows for the passage of chyme from the small intestine to the large intestine?

    <p>Gastroileal reflex</p> Signup and view all the answers

    What is the function of mucin proteins secreted by the large intestine?

    <p>Create a mucus layer on epithelial cells</p> Signup and view all the answers

    How does the Gastrocolic reflex in the large intestine respond to the presence of food in the stomach?

    <p>Stimulates large waves of peristalsis</p> Signup and view all the answers

    What part of the large intestine is most prone to perforation?

    <p>Descending colon</p> Signup and view all the answers

    Which ligaments provide support to the lower portion of the rectum?

    <p>Lateral ligament</p> Signup and view all the answers

    What anatomical structure separates the rectum from the prostate and seminal vesicles or vagina?

    <p>Denonvilliers' fascia</p> Signup and view all the answers

    If the fascia anterior to the rectum is defective, what condition can develop?

    <p>Rectocele</p> Signup and view all the answers

    Which nerves innervate the rectum?

    <p>Parasympathetic nerves</p> Signup and view all the answers

    What kind of muscle makes up the external anal sphincter?

    <p>Skeletal muscle</p> Signup and view all the answers

    What initiates a reflex contraction of the rectal muscles during defecation?

    <p>Distention of the rectum</p> Signup and view all the answers

    Which mechanism is responsible for the electroneutral absorption of NaCl in the intestines?

    <p>Exchange of Na+ for H+</p> Signup and view all the answers

    What causes the relaxation of the internal anal sphincter during defecation?

    <p>Inhibitory signals from the sacral parasympathetic nervous system</p> Signup and view all the answers

    What is the role of the external anal sphincter during defecation?

    <p>To relax voluntarily</p> Signup and view all the answers

    Which nerve is responsible for the innervation of the external anal sphincter during defecation?

    <p>Pudendal nerve</p> Signup and view all the answers

    How is fecal continence maintained in the body?

    <p>Both sphincters are tonically active</p> Signup and view all the answers

    More Like This

    Anatomy of the Large Intestine
    30 questions
    Anatomy of the Small and Large Intestine
    24 questions
    Anatomy of the Large Intestine
    25 questions
    Use Quizgecko on...
    Browser
    Browser