All Human Anatomy and Physiology Resources
Example Questions
Example Question #151 : Organs
Which artery supplies blood to the head and neck?
Internal jugular
Superior vena cava
Common carotid
Brachial
Common carotid
The common carotid is an artery that supplies blood to the head and neck. The internal jugular is the vein that drains blood from the head and neck. The brachial artery provides blood to the arm. The superior vena cava is a large vein that returns blood to the heart from the head and arms.
Example Question #151 : Organs
Which of the following blood vessels most directly drains the legs?
Femoral artery
Pulmonary trunk
Inferior vena cava
Great saphenous vein
Great saphenous vein
The great saphenous vein is responsible for draining the blood from the legs. The femoral artery supplies blood to the legs. The inferior vena cava returns blood from the legs and abdomen to the heart. The pulmonary trunk bifurcates into the right and left pulmonary arteries, which bring oxygen-poor blood to the lungs, where it becomes oxygenated.
Example Question #152 : Organs
What is a lumen?
The inside of the intestines only
The interior of any hollow organ
The inside of a blood vessel only
The inside of the lung only
The interior of any hollow organ
The interior of any hollow organ is called its lumen. A lumen may be completely or partially filled with air or fluid. All of the answer choices are specific examples of lumens.
Example Question #152 : Organs
Which cranial nerve is the trigeminal nerve?
I
V
VI
XI
V
The trigeminal nerve is cranial nerve (CN) V, it has both sensory and motor functions including sensation of the face and scalp, and control of the muscles of mastication. CN XI is the accessory nerve, which has only motor functions, and innervates the muscles of the lateral and posterior neck. CN VI is the abducens nerve, which is a motor nerve that innervates the lateral rectus and controls eye movements. CN I is the olfactory nerve and involves the sense of olfaction.
Example Question #153 : Organs
Someone with an injury to the posterior cord of the brachial plexus would likely present with weakness to which of the following muscles?
Biceps brachii
Lumbricals III and IV
Triceps brachii
Serratus anterior
Flexor carpi ulnaris
Triceps brachii
The triceps brachii is innervated by the radial nerve, which comes from the posterior cord of the brachial plexus. Accordingly, damage to the posterior cord would disrupt function of the triceps brachii, among other muscles. Lumbricals III and IV, and the flexor carpi ulnaris are innervated by the ulnar nerve, which comes from the medial cord of the brachial plexus. The biceps brachii is innervated by the musculocutaneous nerve, which comes from the lateral cord of the brachial plexus. The serratus anterior is innervated by the long thoracic nerve, which is a pre-plexus nerve.
Example Question #154 : Organs
Which of the following does not supply blood to the myocardium of the heart?
Left coronary artery
Circumflex artery
Right coronary artery
Coronary sinus
Left anterior descending artery
Coronary sinus
All of the arteries listed, are coronary arteries, or branches of coronary arteries, which supply blood to the myocardium. The coronary sinus is a group of veins, so it drains blood from the myocardium, rather than supplying it.
Example Question #155 : Organs
Which of the following structures does not pass through the jugular foramen?
Inferior petrosal sinus
Facial nerve (cranial nerve VII)
Glossopharyngeal nerve (cranial nerve IX)
Sigmoid sinus
Vagus nerve (cranial nerve X)
Facial nerve (cranial nerve VII)
Cranial nerves IX and X, as well as the inferior petrosal and sigmoid sinuses pass through the jugular foramen, while cranial nerve VII passes through the internal auditory meatus.
Example Question #156 : Organs
Which of the following is not part of the cardiac conduction system?
Purkinje cells
Bundle of His
Purkinje fibers
Atrioventricular (AV) node
Sinoatrial (SA) node
Purkinje cells
Purkinje cells are found in the cerebellum, and are not part of the cardiac conduction system. All other answer choices are part of the cardiac conduction system, which terminates in the Purkinje fibers.
Example Question #157 : Organs
Which layer of the skin does not contain blood vessels?
Supradermis
Hypodermis
None of these
Epidermis
Dermis
Epidermis
The epidermis does not have direct blood supply; all nutrients that feed cells within the epidermis come from the dermis. The hypodermis lies beneath the dermis and consists of loose connective tissue such as fat. The hypodermic layer also contains blood vessels, lymph vessels, and sweat glands.
Example Question #158 : Organs
Which nerve does not branch off of a division of the trigeminal nerve?
Infratrochlear nerve
Mental nerve
Buccal nerve
Infraorbital nerve
Lesser occipital nerve
Lesser occipital nerve
The lesser occipital nerve comes from the cervical plexus. The mental and buccal nerves come from the mandibular division of the trigeminal nerve, the infratrochlear nerve comes from the ophthalmic division of the trigeminal nerve, and the infraorbital nerve comes from the maxillary division of the trigeminal nerve.