Question 1

Which bone contains the foramen magnum, and what is its primary function?

Accepted Answer

The occipital bone; passage for the spinal cord

Question 2

A patient presents with difficulty rotating their head to the opposite side and flexing their neck. Which muscle is most likely impaired?

Accepted Answer

Sternocleidomastoid

Question 3

Which of the following correctly matches the vertebral type with its unique feature?

Accepted Answer

Cervical vertebrae – transverse foramen

Question 4

A newborn's skull is examined and found to have a soft spot at the junction of the sagittal and coronal sutures. What is this structure called, and what is its significance?

Accepted Answer

Anterior fontanelle; allows for brain growth and skull flexibility during birth

Question 5

Which muscle is primarily responsible for elevating the upper lip during smiling and speech?

Accepted Answer

Zygomaticus major

Question 6

A patient is unable to retract (adduct) their scapula. Which muscle is most likely weakened?

Accepted Answer

Rhomboid major

Question 7

Which of the following best describes the function of the diaphragm during normal (quiet) breathing?

Accepted Answer

Contracts and flattens to increase thoracic volume for inhalation

Question 8

Which structure forms the anterior portion of the hard palate and contains the infraorbital foramen?

Accepted Answer

Maxilla

Question 9

A patient with a herniated intervertebral disc is experiencing nerve compression. Which part of the disc is most likely protruding and causing this issue?

Accepted Answer

Nucleus pulposus

Question 10

Which muscle is the deepest abdominal muscle and is primarily responsible for compressing the abdominopelvic cavity?

Accepted Answer

Transverse abdominis

Question 11

Which of the following is a characteristic feature of cardiac muscle tissue, distinguishing it from skeletal muscle?

Accepted Answer

Presence of intercalated discs

Question 12

A patient is unable to close their eyelids tightly, resulting in difficulty squinting. Which muscle is most likely affected?

Accepted Answer

Orbicularis oculi

Question 13

Which of the following correctly describes the articulation between the atlas (C1) and axis (C2) vertebrae?

Accepted Answer

The dens (odontoid process) of the axis projects into the atlas, allowing rotation of the head

Question 14

Which rib classification is described as ribs that do not attach directly or indirectly to the sternum?

Accepted Answer

Floating ribs

Question 15

Which muscle is primarily responsible for depressing the ribs during forced exhalation?

Accepted Answer

Internal intercostals

Question 16

A patient presents with a fracture at the mandibular condyle. Which articulation is most likely affected?

Accepted Answer

Mandibular fossa of the temporal bone

Question 17

Which of the following best describes the function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

Stores and releases calcium ions for muscle contraction

Question 18

Which suture separates the parietal bones from the occipital bone?

Accepted Answer

Lambdoid suture

Question 19

A lesion affecting the cribriform plate of the ethmoid bone would most likely impact which cranial nerve and function?

Accepted Answer

CN I (Olfactory); sense of smell

Question 20

Which muscle originates on the pubic symphysis and inserts on the xiphoid process and lower ribs, and what is its primary action?

Accepted Answer

Rectus abdominis; flexes the trunk (sit up)

Axial Skeleton, Articulations, and Muscle Tissue Study Guide – Anatomy & Physiology

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