Anatomic Science Quiz 7

Question 1 of 20

1. Question

Radial Nerve Innervation

Which muscle, innervated by the radial nerve (C6-C8), is considered an extensor muscle of the arm/forearm?

Interosseus muscles of the hand

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Thenar muscles of the hand

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Extensor carpi ulnaris

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Flexor carpi ulnaris

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Flexor carpi radialis

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Question 2 of 20

2. Question

Structures Compromised by Clavicular Fracture

A traumatic dislocation of the clavicle at the sternoclavicular joint in a posterior direction can cause compromise to all of the following structures EXCEPT:

Subclavian artery

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Brachial plexus

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Trachea

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Subclavian vein

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All of the above are located in close proximity and could be injured

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Question 3 of 20

3. Question

Motor Innervation of Suprahyoid and Infrahyoid Muscles

Motor innervation from the cervical plexus (ansa cervicalis, C1-C3) includes all of the following muscles EXCEPT:

Sternohyoid

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Stylohyoid

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Omohyoid

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Sternothyroid

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Genioglossus

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Question 4 of 20

4. Question

Symptoms of Lower Motor Neuron Lesion of CN VII (Proximal to Branches)

Suppose a lesion compromises the lower motor neuron of CN VII, occurring proximal to the greater petrosal nerve and chorda tympani. All of the following clinical signs will be shown EXCEPT:

Ipsilateral weakness to musculature of facial expression

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Diminished taste sensation to the posterior 1/3 of the tongue

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Ipsilateral dryness of eye due to lost function of lacrimal gland

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Compromised function of sublingual and submandibular glands

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Hyperacusis in ipsilateral ear

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Question 5 of 20

5. Question

Upper Motor Neuron Lesion of CN VII

A lesion to the upper motor neuron of CN VII would cause which of the following clinical signs?

Total facial muscle paralysis on the contralateral side of the lesion to the upper and lower face

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Partial facial muscle paralysis on the ipsilateral side of the lesion to the lower face only

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Partial facial muscle paralysis on the contralateral side of the lesion to the lower face only

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Total facial muscle paralysis of the contralateral side of the lesion to the upper and lower face

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Partial facial muscle paralysis on the ipsilateral side of the lesion to the upper face only

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Question 6 of 20

6. Question

Branchial Arch Associated with CN VII Derivatives

Which embryonic branchial arch consists of the stapedial artery, CN VII, and the musculature of facial expression?

I

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II

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III

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IV

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I and II

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Question 7 of 20

7. Question

Veins Draining into the Common Facial Vein

The common facial vein, which drains into the internal jugular vein, is formed by the anastomosis of the anterior facial vein and which segment of the retromandibular vein?

Maxillary vein

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Posterior retromandibular vein

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Retromandibular vein (entire structure)

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Anterior segment of the anterior retromandibular vein

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Internal jugular vein

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Question 8 of 20

8. Question

Blood and Vasculature Histology

Which statement regarding blood and associated vasculature is TRUE?

Blood plasma lacking fibrinogen and clotting factors is known as plasma

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The tunica media is the outermost, connective tissue layer of the blood vessel wall.

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Approximately 45% of the blood is composed of plasma.

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Sinusoids are defined as fenestrated capillaries.

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Individuals with type A blood contain plasma lacking anti-B antibodies.

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Question 9 of 20

9. Question

Vessel Involved in Epidural Hematoma

Rupture of which blood vessel, typically lying within the epidural space between the periosteum of the inner skull surface and the dura mater, is associated with an epidural hematoma?

Anterior communicating artery

Correct Incorrect Correct answer

Posterior cerebral artery

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Anterior cerebral artery

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Posterior communicating artery

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Middle meningeal artery

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Question 10 of 20

10. Question

Contents of the Posterior Cranial Fossa

All of the following structures are located within the posterior cranial fossa EXCEPT:

Occipital lobes

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Jugular foramen

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Cerebellum

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Hypoglossal canal

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Optic foramen

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Question 11 of 20

11. Question

Thalamic Nuclei Mediating Facial Sensation and Pain

Which nucleus of the thalamus is involved with mediating facial sensation and pain?

Ventral posterior medial nucleus (VPM)

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Ventral anterior nucleus

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Lateral geniculate nucleus

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Ventral posterior lateral nucleus (VPL)

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Ventral lateral nucleus

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Question 12 of 20

12. Question

Brainstem Nuclei

All of the following are brainstem nuclei involved with cranial nerve function EXCEPT:

Superior salivatory nucleus (CN VII)

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Nucleus ambiguus (CN IX, X)

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Nucleus of the solitary tract (CN VII, IX, X)

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Ventromedial nucleus

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Inferior salivatory nucleus (CN IX)

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Question 13 of 20

13. Question

Auscultation Location of the Tricuspid Valve

The tricuspid valve separates the right atrium from the right ventricle. Where can this valve be best auscultated?

Level of the 5th intercostal space, at the midclavicular line

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Level of the 2nd intercostal space, at the right sternal border

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Level of the 2nd intercostal space, at the left sternal border

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Level of the 5th intercostal space, left of the sternal border

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Level of the 5th intercostal space, right of the sternal border

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Question 14 of 20

14. Question

Blood Supply to the Lateral Wall of the Left Ventricle

Occlusion of which of the following arteries would most directly cause ischemia in the lateral wall of the left ventricle?

Left circumflex artery

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Right coronary artery

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Left anterior descending artery

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Acute marginal artery

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Posterior descending artery

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Question 15 of 20

15. Question

Location of the Vagus Nerve in the Mediastinum

The vagus nerve travels through which portion of the inferior mediastinum?

Superior

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Posterior

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Middle

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Superior and Middle

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Question 16 of 20

16. Question

Fetal Bypass of Pulmonary Circulation

Regarding the fetal circulation, oxygenated blood bypasses the pulmonary circulation by way of which communication?

Left atrium to left ventricle

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Left atrium to right atrium

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Right atrium to right ventricle

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Right atrium to left atrium (Foramen Ovale)

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Left ventricle to aorta

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Question 17 of 20

17. Question

Adult Remnant of the Fetal Foramen Ovale

Which of the following structures of the adult heart is a remnant of the foramen ovale in the fetal heart?

Crista terminalis

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Fossa ovalis

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Sulcus terminalis

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Right auricle

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Atrial appendage

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Question 18 of 20

18. Question

Conduit Between Pulmonary Artery and Aorta in Fetal Circulation

Regarding the fetal circulation, which vasculature structure serves as a conduit connecting the pulmonary artery to the aorta?

Ductus venosus

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Umbilical arteries

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Ductus arteriosus

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Portal vein

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Umbilical vein

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Question 19 of 20

19. Question

Germ Layer Origin of Cardiovascular Epithelial Lining

The epithelial lining of the cardiovascular system originates from which embryonic germ layer?

Mesoderm

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Endoderm

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Ectoderm

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Neuroectoderm

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Neural crest cells

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Question 20 of 20

20. Question

Formation of the Superior Vena Cava (SVC)

Which TWO of the following embryonic structures combine to form the superior vena cava (SVC)?

Bulbus cordis
Right common cardinal vein
Truncus arteriosus
Right anterior cardinal vein
Right horn of sinus venosus

1 and 2

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2 and 3

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4 and 5

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2 and 4

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3 and 4

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Anatomic Science Quiz 7

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