1
USMLE Step 1 Questions and Answers
(100% Correct Answers) Already Graded
A+
What gland is found in the muscular triangle of the neck? Ans:
Thyroid gland
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Is an afferent or efferent pupillary defect described as B/L pupillary
constriction when light is shined in the unaffected eye and B/L
paradoxical dilation when light is shined in the affected eye? Ans:
Guru01 - Stuvia
Afferent pupillary defect (CN II lesion); in an efferent pupillary
defect (CN III), B/L constrict when light is shined in the unaffected
eye and consentual pupil constriction occurs when light is shined
in the affected eye.
What is the name of the spinal cord passing within the
subarachnoid space and forming the spinal nerves that exit the
lumbar and sacral foramina? Ans: Cauda equina
Name the laryngeal muscle described by the following: • Pulls the
arytenoids cartilages closer to the thyroid, relaxing the vocal
ligaments and thereby decreasing the pitch Ans: Thyroarytenoid
muscles
Name the laryngeal muscle described by the following: • Tenses
the vocal ligaments, increasing the distance between the
cartilages, thereby increasing the pitch Ans: Cricothyroid muscles
, 2
Name the laryngeal muscle described by the following: • Adducts
the vocal ligaments, closes the air passageway during swallowing,
and allows phonation Ans: Lateral cricoarytenoid muscles
Name the laryngeal muscle described by the following: • Only
muscle to abduct the vocal cords Ans: Posterior cricoarytenoid
muscles
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Where does the parotid (Stensen's) duct enter the oral cavity?
Ans: Opposite the second upper molar tooth
From what aortic arch are the following structures derived? •
Guru01 - Stuvia
Common and internal carotid arteries Ans: Third aortic arch MS
CARD is my mnemonic for the aortic arch derivatives
From what aortic arch are the following structures derived? •
Degenerates Ans: Fifth MS CARD is my mnemonic for the aortic
arch derivatives
From what aortic arch are the following structures derived? •
Stapes artery Ans: Second MS CARD is my mnemonic for the
aortic arch derivatives
From what aortic arch are the following structures derived? •
Maxillary artery Ans: First MS CARD is my mnemonic for the aortic
arch derivatives
, 3
From what aortic arch are the following structures derived? • Arch
of the aorta and right subclavian artery Ans: Fourth MS CARD is
my mnemonic for the aortic arch derivatives
From what aortic arch are the following structures derived? • Right
and left pulmonary arteries and the ductus arteriosus Ans: Sixth MS
CARD is my mnemonic for the aortic arch derivatives
© 2025 Assignment Expert
What abdominal muscle contributes to the anterior layer of the
rectus sheath, forms the inguinal ligament, and in men gives rise to
the external spermatic fascia of the spermatic cord? Ans: External
abdominal oblique
Guru01 - Stuvia
Name the compartment of the lower extremity and the nerve
based on its movements. • Adduct the thigh and flex the hip Ans:
Medial compartment of the thigh, obturator nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Plantar flex the foot, flex the toes, and
invert the foot Ans: Posterior compartment of the leg, tibial nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Dorsiflex the foot, extend the toes, and
invert the foot Ans: Anterior compartment of the leg, deep
peroneal nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Flex the hip and extend the knee Ans:
Anterior compartment of the thigh, femoral nerve
, 4
Name the compartment of the lower extremity and the nerve
based on its movements. • Extend the hip and flex the knee Ans:
Posterior compartment of the thigh, tibial nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Plantar flex the foot and evert the foot
Ans: Lateral compartment of the leg, superficial peroneal nerve
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What are the five branches of the posterior cord of the brachial
plexus? Ans: STARS 1. Upper Subscapularis 2. Thoracodorsal 3.
Axillary 4. Radial 5. Lower Subscapularis
Guru01 - Stuvia
Name the correct artery. • The right recurrent laryngeal nerve
passes around it. Ans: Right brachiocephalic artery
Name the correct artery. • The left recurrent laryngeal nerve
passes around it. Ans: Arch of the aorta
The inferior mesenteric artery drains into it. Ans: The splenic vein
Are the quadrate and caudate lobes of the liver functionally part
of the left or right lobe? Ans: Functionally they are part of the left
lobe of the liver because they receive their blood supply from the
left hepatic artery. Anatomically they are considered part of the
right lobe of the liver.
What bones make up the acetabulum? Ans: Pubis, ilium, and
ischium
USMLE Step 1 Questions and Answers
(100% Correct Answers) Already Graded
A+
What gland is found in the muscular triangle of the neck? Ans:
Thyroid gland
© 2025 Assignment Expert
Is an afferent or efferent pupillary defect described as B/L pupillary
constriction when light is shined in the unaffected eye and B/L
paradoxical dilation when light is shined in the affected eye? Ans:
Guru01 - Stuvia
Afferent pupillary defect (CN II lesion); in an efferent pupillary
defect (CN III), B/L constrict when light is shined in the unaffected
eye and consentual pupil constriction occurs when light is shined
in the affected eye.
What is the name of the spinal cord passing within the
subarachnoid space and forming the spinal nerves that exit the
lumbar and sacral foramina? Ans: Cauda equina
Name the laryngeal muscle described by the following: • Pulls the
arytenoids cartilages closer to the thyroid, relaxing the vocal
ligaments and thereby decreasing the pitch Ans: Thyroarytenoid
muscles
Name the laryngeal muscle described by the following: • Tenses
the vocal ligaments, increasing the distance between the
cartilages, thereby increasing the pitch Ans: Cricothyroid muscles
, 2
Name the laryngeal muscle described by the following: • Adducts
the vocal ligaments, closes the air passageway during swallowing,
and allows phonation Ans: Lateral cricoarytenoid muscles
Name the laryngeal muscle described by the following: • Only
muscle to abduct the vocal cords Ans: Posterior cricoarytenoid
muscles
© 2025 Assignment Expert
Where does the parotid (Stensen's) duct enter the oral cavity?
Ans: Opposite the second upper molar tooth
From what aortic arch are the following structures derived? •
Guru01 - Stuvia
Common and internal carotid arteries Ans: Third aortic arch MS
CARD is my mnemonic for the aortic arch derivatives
From what aortic arch are the following structures derived? •
Degenerates Ans: Fifth MS CARD is my mnemonic for the aortic
arch derivatives
From what aortic arch are the following structures derived? •
Stapes artery Ans: Second MS CARD is my mnemonic for the
aortic arch derivatives
From what aortic arch are the following structures derived? •
Maxillary artery Ans: First MS CARD is my mnemonic for the aortic
arch derivatives
, 3
From what aortic arch are the following structures derived? • Arch
of the aorta and right subclavian artery Ans: Fourth MS CARD is
my mnemonic for the aortic arch derivatives
From what aortic arch are the following structures derived? • Right
and left pulmonary arteries and the ductus arteriosus Ans: Sixth MS
CARD is my mnemonic for the aortic arch derivatives
© 2025 Assignment Expert
What abdominal muscle contributes to the anterior layer of the
rectus sheath, forms the inguinal ligament, and in men gives rise to
the external spermatic fascia of the spermatic cord? Ans: External
abdominal oblique
Guru01 - Stuvia
Name the compartment of the lower extremity and the nerve
based on its movements. • Adduct the thigh and flex the hip Ans:
Medial compartment of the thigh, obturator nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Plantar flex the foot, flex the toes, and
invert the foot Ans: Posterior compartment of the leg, tibial nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Dorsiflex the foot, extend the toes, and
invert the foot Ans: Anterior compartment of the leg, deep
peroneal nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Flex the hip and extend the knee Ans:
Anterior compartment of the thigh, femoral nerve
, 4
Name the compartment of the lower extremity and the nerve
based on its movements. • Extend the hip and flex the knee Ans:
Posterior compartment of the thigh, tibial nerve
Name the compartment of the lower extremity and the nerve
based on its movements. • Plantar flex the foot and evert the foot
Ans: Lateral compartment of the leg, superficial peroneal nerve
© 2025 Assignment Expert
What are the five branches of the posterior cord of the brachial
plexus? Ans: STARS 1. Upper Subscapularis 2. Thoracodorsal 3.
Axillary 4. Radial 5. Lower Subscapularis
Guru01 - Stuvia
Name the correct artery. • The right recurrent laryngeal nerve
passes around it. Ans: Right brachiocephalic artery
Name the correct artery. • The left recurrent laryngeal nerve
passes around it. Ans: Arch of the aorta
The inferior mesenteric artery drains into it. Ans: The splenic vein
Are the quadrate and caudate lobes of the liver functionally part
of the left or right lobe? Ans: Functionally they are part of the left
lobe of the liver because they receive their blood supply from the
left hepatic artery. Anatomically they are considered part of the
right lobe of the liver.
What bones make up the acetabulum? Ans: Pubis, ilium, and
ischium
