Anatomy of Urethral Arterial Supply

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Questions and Answers

Which statement about the location of the urinary bladder is correct?

  • As the bladder fills, it descends from the greater pelvis towards the umbilicus. (correct)
  • In adults, the superior surface is level with the inferior margin of the pubic symphysis.
  • In adults, it is located in the greater pelvis, anterior to the pubic bone.
  • In infants and young children, it is located entirely in the lesser pelvis.

What is the shape of the empty urinary bladder?

  • Cylindrical
  • Pyramidal (correct)
  • Spherical
  • Conical

Which of the following is NOT a function of the urinary bladder?

  • Varying in size, shape, position, and relations
  • Responding to its content and the state of neighboring viscera
  • Concentrating urine (correct)
  • Temporarily storing urine

Which statement about the relations of the urinary bladder is correct?

<p>In females, it is posterior to the pubic symphysis. (D)</p> Signup and view all the answers

At what age does the urinary bladder enter the lesser pelvis?

<p>At age 6 (B)</p> Signup and view all the answers

Which statement about the variation in the urinary bladder is correct?

<p>It varies in size, shape, position, and relations based on its content and neighboring viscera. (D)</p> Signup and view all the answers

Which of the following structures is NOT directly related to the urinary bladder in males?

<p>Uterus (B)</p> Signup and view all the answers

What is the primary function of the detrusor muscle in the urinary bladder?

<p>To expel urine (B)</p> Signup and view all the answers

In females, which structure is located between the urinary bladder and the rectum?

<p>Rectouterine pouch (of Douglas) (B)</p> Signup and view all the answers

Which of the following statements about the urinary bladder is FALSE?

<p>The neck of the bladder is held in position by the puboprostatic ligament in males. (A)</p> Signup and view all the answers

What is the function of the trigone in the interior of the urinary bladder?

<p>It is a smooth area where the ureters and urethra enter the bladder. (B)</p> Signup and view all the answers

What is the location of the lacuna magna (sinus of Guerin)?

<p>Roof of fossa navicularis (A)</p> Signup and view all the answers

Which of the following structures directly borders the inferolateral surfaces of the urinary bladder in both males and females?

<p>Pubis and obturator internus muscle (A)</p> Signup and view all the answers

What type of tissue makes up the female urethra?

<p>Distensible muscular tube with elastic and smooth muscle tissue (B)</p> Signup and view all the answers

Where does the female urethra begin?

<p>At the internal urethral orifice (D)</p> Signup and view all the answers

Which structures open into the female urethra?

<p>Paraurethral glands of Skene (B)</p> Signup and view all the answers

What is the relation of the external urethral orifice to the pubic symphysis?

<p>1 cm behind it (B)</p> Signup and view all the answers

Which artery primarily supplies the base of the bladder and the trigone region?

<p>Inferior vesical artery (C)</p> Signup and view all the answers

In females, which arteries replace the function of the inferior vesical artery in supplying blood to the bladder?

<p>Uterine and vaginal arteries (D)</p> Signup and view all the answers

What is the primary venous drainage pathway for the bladder?

<p>Vesical venous plexus draining into the internal iliac vein (D)</p> Signup and view all the answers

Which of the following statements about the lymphatic drainage of the bladder is correct?

<p>Lymph vessels from the inferolateral surface join those from the superior surface and drain to the external iliac nodes (D)</p> Signup and view all the answers

Which nerve plexus is responsible for the motor innervation of the detrusor muscle and inhibitory innervation of the sphincter vesicae?

<p>Parasympathetic component (nervi erigentes S2-S4) of the vesical nerve plexus (C)</p> Signup and view all the answers

Which part of the male urethra is the widest and most dilatable?

<p>Prostatic urethra (A)</p> Signup and view all the answers

Which of the following statements about the internal sphincter of the bladder is correct?

<p>It is a circular smooth muscle at the neck of the bladder innervated by the autonomic nervous system. (A)</p> Signup and view all the answers

Which of the following arteries supply the male urethra?

<p>Both A and B. (D)</p> Signup and view all the answers

Which of the following statements about the venous drainage of the male urethra is correct?

<p>The posterior urethra drains into the prostatic and vesical venous plexuses, which drain into the internal iliac vein. (C)</p> Signup and view all the answers

Which of the following statements about the lymphatic drainage of the male urethra is correct?

<p>The entire urethra drains into the internal iliac nodes, with some vessels ending in the external iliac nodes. (A)</p> Signup and view all the answers

Which of the following statements about the nerve supply to the urethra is correct?

<p>Both A and B are correct. (D)</p> Signup and view all the answers

Which of the following statements about the arterial supply to the female urethra is correct?

<p>The female urethra is supplied by the vaginal and internal pudendal arteries. (C)</p> Signup and view all the answers

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