How and why is the mobile scapula of therians essential for their form of locomotion?
What will be an ideal response?
The mobile scapula allows a longer reach with the forelimb, and the scapula sling muscles provide cushioning when the animal lands on its front feet. The typical bounding gait of therians would probably be impossible without scapula mobility.
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What thoracic muscles are involved in expiration?
A. external intercostals B. internal intercostals C. scalene muscles D. transversus thoracis
Muscles of the vertebral column that insert on the skull include the word ________ in their names
A) cervicis B) capitis C) thoracis D) lumborum
The countercurrent mechanism functions primarily in the
A) distal convoluted tubule B) nephron loop. C) proximal convoluted tubule. D) renal corpuscle.
This type of cartilage supports the external ear and keeps it firm but flexible
A) hyaline B) fibrocartilage C) elastic