Anatomic Science Quiz 8

Question 1 of 20

1. Question

Structures Involved in Atrial Septal Defect

Incomplete fusion of which two structures results in the formation of an atrial septal defect?

Ostium secundum
Ostium primum
Septum primum
Septum secundum
Septum spurium

1 and 2

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2 and 3

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2 and 4

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3 and 4

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3 and 1

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Question 2 of 20

2. Question

Derivative of the 4th Aortic Arch

Which of the following is a derivative of the 4th aortic arch?

Hyoid artery

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Stapedial artery

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Right subclavian artery

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Common carotid artery

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Pulmonary arteries

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Question 3 of 20

3. Question

Structure NOT Forming the Femoral Triangle Boundary

All of the following structures form a boundary or part of the floor of the femoral triangle EXCEPT:

Sartorius muscle (Lateral border)

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Inguinal ligament (Superior border)

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Adductor longus muscle (Medial border)

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Cremaster muscle

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Pectineus muscle (Floor)

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Question 4 of 20

4. Question

Abdominal Musculature

Which statement regarding the musculature of the abdomen is FALSE?

The external oblique muscle contracts to increase abdominal pressure

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The internal oblique muscle is innervated by the lower intercostal, iliohypogastric, and ilioinguinal nerves

Correct Incorrect Correct answer

The external oblique muscle is innervated only by the lower intercostal nerves.

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The transversus abdominis muscle contracts to flex the vertebral column.

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The rectus abdominis muscle originates at the pubic symphysis.

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Question 5 of 20

5. Question

Connective Tissue Attachments

Which statement correctly describes a type of connective tissue attachment?

Tendons form attachments between bone and bone.

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Ligaments connect muscle and bone.

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Aponeuroses are simply sheetlike layers of tendon.

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Connective tissue of the body is uniformly derived from neural crest cells.

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Aponeuroses connect two separate bones.

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Question 6 of 20

6. Question

Neurovascular Bundle of the Intercostal Space

Which statement regarding the thoracic region is FALSE?

The neurovascular bundle of the intercostal space runs along the costal groove at the inferior surface of each rib.

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Musculature of respiration includes the intercostal muscles, diaphragm, and accessory muscles.

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The costal groove of each rib offers the greatest protection to the nerve when injury occurs.

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The rib cage contains 12 ribs, with ribs I-VI being true, VII-X false, and XI-XII floating.

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Fracture of the left 10th and 11th ribs can cause injury to the spleen.

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Question 7 of 20

7. Question

Diaphragm Openings and Function

All of the following statements pertaining to the diaphragm are correct EXCEPT:

Blood supply to the diaphragm is via the musculophrenic artery.

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The aorta passes through two crura when passing through the aortic opening

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The caval opening allows passage of the inferior vena cava.

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During inspiration, the diaphragm contracts, flattening out.

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Innervation to the diaphragm is via the phrenic nerve (C3, C4, C5).

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Question 8 of 20

8. Question

roperties of the Thymus

Relative to the thymus, which of the following statements is FALSE?

Growth continues and peaks at puberty, and then atrophies.

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Lymphatic circulation returns via afferent vessels so that lymph may be filtered.

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It is the site of T-cell maturation.

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Thymic corpuscles/epithelioreticular cells are contained within the inner medulla.

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The outer cortex holds the largest concentration of lymphocytes.

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Question 9 of 20

9. Question

Optic Nerve Fiber Decussation

Regarding vision and optic nerve fibers, which statement is TRUE?

Left lateral/temporal fibers decussate and cross over at the optic chiasma en route to the right primary visual cortex.

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Right medial/nasal fibers decussate and cross over at the optic chiasma en route to the left primary visual cortex.

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Right lateral/temporal fibers decussate and cross over at the optic chiasma en route to the left primary visual cortex.

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Left medial/nasal fibers decussate and stay ipsilateral at the optic chiasma en route to the left primary visual cortex.

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Left lateral/temporal fibers are received by the right primary visual cortex.

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Question 10 of 20

10. Question

Innervation of the Lateral Rectus Muscle

Which cranial nerve innervates the lateral rectus muscle of the eye?

Superior oblique muscle (CN IV)

Correct Incorrect Correct answer

Medial rectus muscle (CN III)

Correct Incorrect Correct answer

Inferior rectus muscle (CN III)

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Lateral rectus muscle (CN VI)

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Superior rectus muscle (CN III)

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Question 11 of 20

11. Question

Pupillary Light Reflex

When shining light onto the right eye, which response involves ipsilateral afferent firing via CN II followed by subsequent contralateral efferent firing via CN III to the left eye?

Direct response to the right eye

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Direct response to the left eye

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Consensual response to the right eye

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Consensual response to the left eye

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Afferents fire via CN III in both responses

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Question 12 of 20

12. Question

Main Action of the Superior Oblique Muscle

The trochlear nerve (CN IV) innervates the superior oblique muscle. What is the main action of this muscle?

Superior movement of the eye

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Superior and medial movement of the eye

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Downward movement of the eye

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Lateral movement of the eye

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Inferior and lateral movement of the eye

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Question 13 of 20

13. Question

Accommodation without Pupillary Light Reaction

Which lesion involving vision, often seen in patients with syphilis and diabetes, causes accommodation but a loss of miosis function (pupillary light-near dissociation)?

Internuclear ophthalmoplegia

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Ophthalmoplegia

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Marcus-Gunn/relative afferent pupil

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Argyll-Robertson/papillary light-near dissociation pupil

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Horner syndrome

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Question 14 of 20

14. Question

Components of the Circle of Willis

All of the following blood vessels comprise the circle of Willis EXCEPT:

Middle cerebral artery

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Posterior cerebral artery

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Internal carotid artery

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Posterior communicating artery

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Anterior communicating artery

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Question 15 of 20

15. Question

Arteries Commonly Involved in Stroke

Which small, thin-walled arteries, known as the “arteries of stroke,” are a branch of the middle cerebral artery and are commonly involved in severe ischemic injury?

Left anterior cerebral artery

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Right posterior cerebral artery

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Lenticulostriate arteries

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Left vertebral artery

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Left internal carotid artery

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Question 16 of 20

16. Question

Bony Structure NOT Directly Involved in Tongue Attachment/Movement

If damaged, all of the following bony structures or landmarks would directly alter movement of the tongue EXCEPT:

Genial tubercles

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Hamulus

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Hyoid bone

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Styloid process

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All of the above are involved

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Question 17 of 20

17. Question

Location of the Lingula

The lingula is a tongue-shaped depression present on which lobe of which lung?

Middle lobe of right lung

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Superior lobe of right lung

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Superior lobe of left lung

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Inferior lobe of left lung

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Inferior lobe of right lung

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Question 18 of 20

18. Question

Structure that Wraps Around the Ligamentum Arteriosum

Which structure, a branch of the vagus nerve (CN X), wraps around the arch of the aorta (ligamentum arteriosum) as it ascends in the mediastinum?

Right recurrent laryngeal nerve

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Left brachiocephalic vein

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Right subclavian vein

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Superior laryngeal nerve

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Left recurrent laryngeal nerve

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Question 19 of 20

19. Question

Anatomical Features of the Foramen Magnum

Each of the following statements concerning the foramen magnum is true EXCEPT:

It is located in the occipital bone.

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It allows passage of the medulla oblongata/spinal cord.

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It allows passage of the spinal accessory nerve.

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It is located in the parietal bone.

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It allows passage of the vertebral arteries.

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Question 20 of 20

20. Question

Tissue Covering the Mandibular Condyle

The articulating surface of the mandibular condyle is covered with which type of tissue?

Dense fibrocartilage

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Loose connective tissue

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Elastic cartilage

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Hyaline cartilage

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Dense irregular connective tissue

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Anatomic Science Quiz 8

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