Mammalian Limb Locomotion Types Quiz
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Questions and Answers

What is the purpose of the clavicle in mammals?

  • To rotate the forelimbs backward
  • To brace the scapula against the sternum (correct)
  • To rotate the hind limbs forward
  • To increase the efficiency of the hind limbs
  • Which stance is used by early reptiles and today's lizards, turtles, and salamanders?

  • Fully-improved stance
  • Self-improved stance
  • Upright stance
  • Spreading stance (correct)
  • What skeletal elements are present in the forelimbs of all tetrapods?

  • Scapula, radius, ulna, carpals, and metacarpals
  • Clavicle, radius, ulna, carpals, metacarpals, and phalanges
  • Humerus, ulna, carpals, metacarpals, and phalanges
  • Humerus, radius, ulna, carpals, metacarpals, and phalanges (correct)
  • Which type of joint allows movement back and forth and up and down without rotation?

    <p>Saddle joint</p> Signup and view all the answers

    In mammals, what is the outcome of rotating the forelimbs backwards?

    <p>Elbows point to the rear</p> Signup and view all the answers

    Which animals use the fully-improved 'upright' stance?

    <p>Mammals and dinosaurs</p> Signup and view all the answers

    Which method of locomotion is characterized by the entire surface of the foot resting on the ground with each step?

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

    In which group of ungulates are the digits 3 and 4 retained as functional digits?

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

    What type of foot structure do animals like cattle, goats, and pigs have due to bearing weight on two parallel axes?

    <p>Paraxonic foot</p> Signup and view all the answers

    Which of the following mammals exemplifies digitigrade locomotion?

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

    What is the term used to describe the walking style where animals bear weight on hoofs that are modified claws?

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

    Which group of animals are known to have a mesaxonic foot structure in their limbs?

    <p>Horses, zebras, tapirs</p> Signup and view all the answers

    Which type of muscles allow side-to-side movement of the vertebral column and provide support and arching of the back in sea lions and walruses?

    <p>Epaxial muscles</p> Signup and view all the answers

    In which animals are the Hypaxial muscles crucial for supporting the abdomen, bending the vertebral column, and acting as the musculature of the tail?

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

    What is the function of the Integumentary muscle known as arrector pili in sea lions and walruses?

    <p>Twitching the skin</p> Signup and view all the answers

    Which mammals have well-developed Mimetic muscles that are specialized for facial expressions?

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

    What skeletal element allows horses and cows to twitch their skin using a specific muscle?

    <p>Pectoral girdle</p> Signup and view all the answers

    What modification in the circulatory system of mammals that dive to great depth helps them withstand high pressure and provide oxygen underwater?

    <p>Right atrium wall incorporation of sinus venosus</p> Signup and view all the answers

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