Human Anatomy and Physiology : Gross Anatomy

Study concepts, example questions & explanations for Human Anatomy and Physiology

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Example Questions

Example Question #18 : Identifying Nerves And Blood Vessels

A 79-year old nursing home resident complains that food has been tasting funny the past few months. She has also mentioned that she used to love smelling all the flowers in the garden, but does not enjoy it as much anymore because “they don’t smell good like they used to.” You suspect that with age some of her nerve fibers may be deteriorating. What type of nerve fibers are involved in this patient?

Possible Answers:

General visceral afferent

Special somatic afferent

Special visceral afferent

General somatic afferent

General somatic efferent

Correct answer:

Special visceral afferent

Explanation:

This question tests knowledge of different nerve fiber types. Smell and taste is transmitted by special visceral afferent nerve fibers.

Special somatic afferent fibers carry information of sight, sound, and balance. General somatic afferent fibers are sensory fibers transmitting information from the body to the spinal cord, such as pain and touch. General somatic efferent fibers are motor fibers transmitting impulses from the spinal cord to skeletal (voluntary) muscles. General visceral afferent fibers carry sensation reflex or pain sensation from mucous membranes, glands, and blood vessels, while general visceral efferent fibers transmit signals from the spinal cord to smooth (involuntary) muscle and glandular tissue.

Example Question #19 : Identifying Nerves And Blood Vessels

Peptic ulcer disease is most commonly found in the duodenum and can occasionally penetrate through the duodenal wall and erode other structures. What vessel is most likely to be injured if an ulcer in the superior part of the duodenum were to perforate through?

Possible Answers:

Left gastric artery

Gastroduodenal artery

Right gastroepiploic artery

Splenic artery

Common hepatic artery

Correct answer:

Gastroduodenal artery

Explanation:

Perforation of a duodenal ulcer would erode the gastroduodenal artery.

The gastroduodenal artery branches off the common hepatic artery and runs posterior to the superior and descending parts of the duodenum. If a duodenal ulcer were to perforate, the gastroduodenal artery is the most likely to be affected.

The common hepatic artery is a main branch off the celiac trunk, but is found superior to the duodenum. The left gastric artery is another branch off the celiac trunk that is left of the duodenum, supplying the lesser curvature of the stomach. The splenic artery is the third branch off the celiac trunk and runs posterior to the stomach. The right gastroepiploic artery is a branch of the gastroduodenal artery that runs inferior to the stomach, supplying the greater curvature of the stomach.

Example Question #591 : Gross Anatomy

Damage to which nerve results in "winging" of the scapula?

Possible Answers:

Subscapular nerve

Axillary nerve

Long thoracic nerve

Median nerve

Thoracodorsal nerve

Correct answer:

Long thoracic nerve

Explanation:

The long thoracic nerve innervates the serratus anterior muscle, which keeps the medial border and inferior angle of the scapula pressed against the thoracic wall. The long thoracic nerve is located very superficially and is often damaged during surgery. Damage to the long thoracic nerve causes the medial border and inferior angle of the scapula to elevate away from the thoracic wall, resulting in "winging" of the scapula. When this occurs, normal elevation of the arm is not possible.

The thoracodorsal nerve innervates the latissimus dorsi. Damage to the thoracodorsal nerve results in diminished capacity to use the arms to pull the body forward or upward, such as the motion of doing pull-ups. The superior and inferior subscapular nerves innervate the subscapularis muscle, a rotator cuff muscle used to stabilize the glenohumeral joint (shoulder). The median nerve innervates the flexors of the forearm and some parts of the hand. The axillary nerve innervates the deltoid, teres minor, and triceps brachii. Damage to the axillary nerve results in inability to abduct the arm greater than fifteen degrees.

Example Question #21 : Identifying Nerves And Blood Vessels

What vessels transport blood from the lungs to the heart?

Possible Answers:

Pulmonary artery

Superior vena cava

Pulmonary veins

Aorta

Correct answer:

Pulmonary veins

Explanation:

The pulmonary arteries carry deoxygenated blood from the right ventricle to the capillaries of the alveoli for gas exchange. Once the blood is oxygenated, the pulmonary veins will drain into the left atrium of the heart. There are five pulmonary veins that leave the lungs, but two fuse before arriving resulting in four veins to actually empty into the heart. The superior vena cava collects deoxygenated blood from the veins of the head, trunk, and upper extemities and empties into the right atrium of the heart. The aorta leaves the left ventricle of the heart and carries oxygenated blood toward the rest of the body.

Example Question #22 : Identifying Nerves And Blood Vessels

Which of the following is a false statement about the phrenic nerve?

Possible Answers:

Arises from the cervical nerves C6-C7

Arises from the cervical nerves C3-C5

Innervates the diaphragm for motor function

The phrenic nerve can be cut to stop chronic hiccups

Correct answer:

Arises from the cervical nerves C6-C7

Explanation:

The phrenic nerve is credited for innervating the diaphragm and helping us breathe. It originates from the cervical nerves C3, C4, and C5. It enters the thoracic cavity by passing in front of the subclavian arteries and travelling anterior to the root of the lungs. The right and left phrenic nerves innervate the diaphragm, primarily for motor function, but also provide sensory function for the central tendon. If there is an injury to the phrenic nerve, there may be partial or complete paralysis of the diaphragm on the affected side. However, since there is an accessory phrenic nerve, it may be sectioned when there is a case of chronic hiccups. Chronic hiccups result from irritated nerves in the digestive tract or the diaphragm.

Example Question #22 : Identifying Nerves And Blood Vessels

Spinal root pairs arise at different levels in the vertebral column. Which of the following gives an incorrect number of spinal nerve root pairs found in the given spinal region?

Possible Answers:

Coccygeal - 1

Lumbar - 5

Thoracic - 12

Sacral - 5

Cervical - 7

Correct answer:

Cervical - 7

Explanation:

There are 31 pairs of spinal nerve roots that arise segmentally: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.

Example Question #22 : Identifying Nerves And Blood Vessels

Which nerve innervates the gluteus maximus?

Possible Answers:

Inferior gluteal nerve

Superior gluteal nerve

Sciatic nerve

Superior pudendal nerve

Correct answer:

Inferior gluteal nerve

Explanation:

The inferior gluteal nerve supplies the gluteus maximus. The gluteus medius and gluteus minimus are supplied by the superior gluteal nerve. 

Example Question #123 : Organs

What of the given structures is most medial as it enters the inguinal canal?

Possible Answers:

Femoral artery

Rectus femoris 

Femoral nerve

Femoral vein

Correct answer:

Femoral vein

Explanation:

The femoral vein, femoral artery, and femoral nerve all pass through the inguinal canal; the rectus femoris is a muscle and does not pass through this structure. The most medial structure at the entrance of the canal is the femoral vein; the most lateral structure is the femoral nerve.

Example Question #23 : Identifying Nerves And Blood Vessels

What are the four branches off of the thoracoacromial trunk?

Possible Answers:

Clavicular, acromion, pectoral, and deltoid

Clavicular, pectoral, axillary, and internal thoracic

Lateral thoracic, superior thyroid, acromion, and deltoid

Brachial, axillary, internal thoracic, and subscapular

Correct answer:

Clavicular, acromion, pectoral, and deltoid

Explanation:

The thoracoacromial trunk is one of the branches off of the second part of the axillary artery. The four branches make the acronym CAPD. This stands for: Clavicular Acromion Pectoral and Deltoid.

Example Question #24 : Identifying Nerves And Blood Vessels

At what point does the femoral artery become the popliteal artery?

Possible Answers:

Patellar ligament

Popliteal fossa

Adductor foramen

Obturator foramen

Correct answer:

Adductor foramen

Explanation:

The femoral and popliteal arteries are found in the thigh and leg. The vessel changes from the femoral artery to the popliteal artery after it travels through a foramen, or hole. Of our four answer choices only two of them are holes. The obturator foramen is located in the pelvis. The adductor foramen is located at the adductor magnus muscle in the thigh, making it the only correct answer. 

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