Question 1

Tonsils are masses of lymphoid tissue located in the oral cavity and pharynx. Like lymph nodes, tonsils are located along lymphatic vessels.

Accepted Answer

The first statement is true, as tonsils are indeed masses of lymphoid tissue located in the oral cavity and pharynx. However, the second statement is false, as tonsils are not located along lymphatic vessels. Rather, they are located at the entrance to the pharynx and are involved in trapping and removing foreign pathogens from entering the body.

Question 2

The lymphatics of the right side of the head and the neck converge by way of the right jugular trunk. These lymphatics then join the lymphatics from the right arm and thorax to form the thoracic duct.

Accepted Answer

The first statement is true, as the lymphatics of the right side of the head and the neck do converge by way of the right jugular trunk. However, the second statement is false, as the lymphatics from the right arm and thorax do not join the thoracic duct. Instead, the lymphatics from the left arm and thorax join the thoracic duct.

Question 3

Which of the teeth listed below, when infected, do NOT initially drain into the submandibular lymph nodes but into another group of lymph nodes?

Accepted Answer

Maxillary third molars initially drain into the retropharyngeal lymph nodes, which are located in the neck and not the submandibular lymph nodes.

Question 4

What is the term used to denote the spread of cancer from the original or primary site of the tumor to another secondary site?

Accepted Answer

Metastasis is the term used to denote the spread of cancer from the original or primary site of the tumor to another secondary site. Miosis is a constriction of the pupil, mydriasis is a dilation of the pupil, and mitosis is the process of cell division.

Question 5

Which of the following lymph nodes can be effectively palpated during an extraoral examination by having the patient turn his or her head to the side?

Accepted Answer

The answer of Which of the following lymph nodes can...

Question 6

What is another term for external jugular lymph nodes?

Accepted Answer

The external jugular lymph nodes are also known as the superficial cervical nodes.

Question 7

Which of the following signs or symptoms listed below CANNOT be used to describe a lymph node involved in cancer?

Accepted Answer

A lymph node that is mobile can still be involved in cancer, so it cannot be used to rule out cancer involvement. Bony hard, nonmotile, and NOT tender are all signs that can indicate lymph node involvement in cancer.

Question 8

Which of the following structures allows lymph to flow DIRECTLY into the surrounding lymph nodes?

Accepted Answer

Afferent vessels are the small lymphatic vessels that carry lymph fluid from the lymphatic capillaries to the lymph nodes. They allow lymph to flow directly into the surrounding lymph nodes. Efferent vessels, on the other hand, carry lymph away from the lymph node. Lymphatic ducts drain lymph from the lymphatic system into the bloodstream, and capillaries and venules are part of the blood circulatory system, not the lymphatic system.

Question 9

The occipital lymph nodes can be palpated during the extraoral examination by asking the patient to tilt his or her head to the left and then to the right with the chin upward BECAUSE the occipital lymph nodes empty into the inferior deep cervical nodes of the neck.

Accepted Answer

The answer of The occipital lymph nodes can be palpated...

Question 10

Which of the following terms BEST describes the process in lymph nodes when a patient has a disease process active in a region, such as cancer or infection, by increasing in size and changing the consistency of the lymphoid tissue?

Accepted Answer

Lymphadenopathy refers to the enlargement and changes in consistency of lymphoid tissue in lymph nodes due to a disease process such as cancer or infection.

Question 11

The lymphatics are a part of the immune system, and they help fight disease processes. Another component of the lymphatic system is the thymus gland because it works within immune system.

Accepted Answer

The first statement is true as the lymphatics are indeed a part of the immune system and function to help fight diseases. The second statement is false, as the thymus gland is not directly involved in the lymphatic system, but rather it is a gland responsible for the development and maturation of certain white blood cells that are involved in the immune response.

Question 12

Which of the following lymph nodes are NOT considered to be superficial lymph nodes located in the head?

Accepted Answer

The retropharyngeal lymph nodes are located deep in the neck, behind the pharynx, and are therefore not considered superficial lymph nodes. The other options listed are all located in the head and are considered superficial lymph nodes.

Question 13

Which of the following is considered the MAIN role of the lymph nodes in relationship to the lymph within lymphatic vessels?

Accepted Answer

The main role of the lymph nodes is to filter lymph as it passes through them, removing harmful substances such as bacteria, viruses, and cancer cells.

Question 14

Unlike capillaries, lymphatic vessels have valves similar to many veins. These valves ensure a one-way flow of lymph through the lymphatic vessel.

Accepted Answer

The statement is correct in stating that lymphatic vessels have valves similar to veins, and the reason correctly explains that these valves ensure a one-way flow of lymph through the lymphatic vessel. Therefore, both the statement and the reason are correct and related.

Question 15

The palatine tonsil is located in the oral cavity between the posterior faucial pillar and which of the following structures?

Accepted Answer

The palatine tonsil is located between the anterior and posterior faucial pillars, with the anterior pillar being towards the front of the mouth and the posterior pillar being towards the back of the mouth. Therefore, the correct answer is B, the anterior faucial pillar.

Question 16

MOST lymph from the head and neck ultimately drains through which group of lymph nodes?

Accepted Answer

The answer of MOST lymph from the head and neck...

Question 17

The retroauricular lymph nodes are also known by which of the following terms?

Accepted Answer

Retroauricular lymph nodes are located behind the ear, in the area known as the mastoid process. Therefore, the alternative term for retroauricular lymph nodes is mastoid lymph nodes. Facial, deep parotid, and retropharyngeal lymph nodes are located in different areas of the head and neck.

Question 18

In healthy patients, lymph nodes are usually small, soft, and free or mobile in the surrounding tissue. Therefore lymph nodes normally can be easily visualized or palpable during an extraoral examination of a healthy patient.

Accepted Answer

The first statement is true - healthy lymph nodes are usually small, soft, and free or mobile in the surrounding tissue. However, the second statement is false - lymph nodes should not be easily visible or palpable in a healthy patient. If they are enlarged or firm, it may indicate an underlying health concern. Therefore, the answer is C - the first statement is true, and the second statement is false.

Question 19

The submandibular lymph nodes are located at the inferior border of the ramus of the mandible, just superficial to the submandibular salivary gland and within the submandibular fascial space. These nodes drain the cheeks, upper lip, body of the tongue, anterior hard palate, as well as the mandibular incisors and maxillary third molars.

Accepted Answer

The answer of The submandibular lymph nodes are located at...

Question 20

A dental professional needs to check carefully for any palpable nodes of the head and neck during an extraoral examination BECAUSE the palpable lymph nodes may help determine where a disease process is active.

Accepted Answer

The statement and the reason are both correct and related. Checking for palpable lymph nodes during an extraoral examination is important because they can provide important information about any ongoing disease processes in the head and neck region. Hence, option A is the correct choice.

Quiz 10: Lymphatic System