Comparative Vertebrate Anatomy Fall 2016 Third Lecture Exam Place your name on b

Question

Comparative Vertebrate Anatomy Fall 2016 Third Lecture Exam Place your name on back of last page and nowhere else! 100 points Multiple Choice. Place the letter of the most appropriate answer onto the line provided. (2 points each) s mammalian modification of the nephron (uriniferous tubule) establishes a Na' gradient in the kid ney medulla and, therefore, allows for the formation of a hypertonic urine. A) Bowman's capsule B) proximal tubule C) renal corpuscle D) loop of 2. This duct develops into the vas deferens in male mammals. Mullerian Duct B) archinephric duct C) paramesonephric duct D) pneumatic duct A) Mullerian Duct B) archinephric duct C) paramesonephric duct D) pneumatic duct A) urethra B) ureter C) archinephric duct D) mullerian duct 3 This duct develops into the vas deferens in male turtles. This duct drains the kidney of an adult male turtle and transports urine to the bladder. This duct drains the kidney of an adult female giraffe and transports urine to the bladder. A) urethra C) archi nephric duct D) mullerian duct B) ureter A) opisthonephros B) mesonephros C) pronephros D) metanephros A)pneumatic ductB) archinephric duct C)paramesonephric duct (/) The head kidney of teleost fish develops from which embryonic kidney section? Which of the following embryonic ducts develops into the oviduct in female crocodiles? i..nn ina Gm nankrane Drineinal calle formina walle of thie .

Explanation / Answer

1. loop of henle is the part of renal nephron. loop of henle is extremely permeable to water but less permeable to ions. it reabsorbs most of the water from the filterate entering it, thus making the urine concentrated or hypertonic.

so the answer is (D) loop of henle

2. In male mammals, mesonephric duct also known as wolfian duct, archinephric duct or leydig duct differentiates to form accessory sex organs.

mesonephric duct is present during embryogenesis.

So the answer is (B) archinephric duct

3. In male turtles, the vas deferens develops from wolfian duct also called archinephric duct.

It is the same duct that differentiates into epidydimis and seminal vescicles.

so the answer is (B) archinephric duct

4. IN male turtles, kidneys function for osmoregulation and excretion. ureters drain nitrogenous waste to bladder via cloaca

so the answer is (B) ureter

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