Human Anatomy: Sinuses & Vertebrae

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What is one of the primary functions of the sinuses?

To act as a barrier against infections

To serve as a structural support

To enhance resonance of speech (correct)

To protect the brain from impacts

Which characteristic is shared by all sinuses mentioned?

They have openings that connect to the throat

They vary in size according to age

They are lined with mucosa and are air filled (correct)

They are filled with mucous

What is a common function of spinal curvatures?

To facilitate nerve signal transmission

To enhance motor function

To absorb shock and maintain balance (correct)

To provide structural rigidity

Which of the following is NOT a characteristic of a typical vertebra?

It contains intervertebral discs Signup and view all the answers

Which group of vertebrae is characterized by having a broader body structure?

Lumbar vertebrae Signup and view all the answers

What shape is the lumbar vertebrae described as posteriorly?

Shaped like a moose Signup and view all the answers

What is the shape of the body of lumbar vertebrae?

Thick and kidney-shaped Signup and view all the answers

How many vertebrae are fused to form the sacrum?

5 Signup and view all the answers

What does the auricular surface of the sacrum form?

SI joint Signup and view all the answers

What structure is indicated by the anterior sacral foramina?

Ventral rami Signup and view all the answers

What kind of foramina are found on the posterior side of the sacrum?

Dorsal sacral foramina Signup and view all the answers

Which of these ribs are considered true ribs?

1-7 Signup and view all the answers

Which feature distinguishes lumbar vertebrae from thoracic vertebrae?

Shape of the spinous process Signup and view all the answers

What is the primary function of false ribs?

Protection of the thoracic cavity Signup and view all the answers

Which region of the sternum is the first rib attached to?

Manubrium Signup and view all the answers

What types of ribs are classified as floaters?

Ribs 11-12 Signup and view all the answers

Which muscles attach to the xiphoid process?

Rectus abdominis Signup and view all the answers

What is the superior costal facet used for?

Articulation with the head of the rib Signup and view all the answers

What component of the rib cage allows for flexibility?

Hyaline cartilage Signup and view all the answers

Which of the following ribs is not considered a true rib?

Rib 8 Signup and view all the answers

What is the role of intercostal muscles?

Facilitate lung expansion Signup and view all the answers

Which structure is included in the pectoral girdle?

Clavicle Signup and view all the answers

What is a common characteristic of floating ribs?

They have no anterior attachment Signup and view all the answers

What part of the ulna articulates with the trochlea of the humerus?

Trochlear notch Signup and view all the answers

Which structure connects the radius and ulna?

Interosseous membrane Signup and view all the answers

What is the primary function of the radial fossa?

To receive the head of the radius Signup and view all the answers

What does the coronoid process articulate with?

Trochlea Signup and view all the answers

Which articulation is formed by the head of the radius?

Capitulum Signup and view all the answers

What is the consequence of a Colle’s fracture?

Fracture at the distal end of the radius Signup and view all the answers

Which structure is NOT a part of the distal radius?

Radial tuberosity Signup and view all the answers

What is the role of the olecranon fossa?

To accommodate the olecranon Signup and view all the answers

What is the location of the ulnar notch?

At the distal end of the radius Signup and view all the answers

Which structure is primarily responsible for the upward curve of the medial longitudinal arch?

Interlocking foot bones Signup and view all the answers

Which joint is formed by the radial notch of the ulna?

Proximal radioulnar joint Signup and view all the answers

What distinguishes the great toe (Digit I) from other toes in terms of phalanx structure?

It has no middle phalanx. Signup and view all the answers

Which muscle primarily functions on the dorsal surface of phalanges II to V?

Extensor digitorum longus Signup and view all the answers

What is the purpose of the arches of the foot?

To allow the foot to bear weight Signup and view all the answers

Which of the following describes the transverse arch of the foot?

It runs obliquely from one side of the foot to the other. Signup and view all the answers