Medschool Anatomy Trivia Quiz

Answer: Arachnoid mater and pia mater

Cerebrospinal fluid (CSF) is secreted by specialised cells that form part of the central nervous system. This fluid circulates around an intricate system in the human body and it is usually located between the arachnoid mater and pia mater of the meninges.

The procedure by which this CSF is obtained is called a lumbar puncture in which a needle is inserted between two specific vertebra and the sample is drawn. The laboratory examination of CSF can help in the diagnosis of diseases such as meningitis.

Answer: Speech

Both the Broca's area and Wernicke's area are related to speech. To be specific, Broca's area is associated with development of language and it has a role in the understanding of language that is either read or written. Broca's area is associated with language comprehension and production. Both areas are usually present in the dominant hemisphere of the brain in individuals. Damage to these areas can cause speech problems and difficulty in language comprehension.

Answer: Mandible

The nasal septum is formed by the vomer bone, the perpendicular plate of the ethmoid bone, the nasal septal cartilage and the maxillary crest. This septum can be deviated and cause a situation called deviated nasal septum (DNS). DNS can be caused by trauma to the nose. A septoplasty can be done to fix a case of DNS.

Answer: Orbicularis oris

The orbicularis muscle is the muscle that is used by player of brass instruments. It is a muscle that contains four quadrants of muscle fibres in different directions which give the form of one circular muscle, as seen in the picture. It is also used when lips are pouted and when they are closed. It is colloquially referred to as the kissing muscle.

Answer: 9th and 11th rib pairs

The rib cage in humans has 12 pairs of ribs making a total of 24 individual ribs. The 1st to 7th pairs of ribs are referred to as the true ribs as they are attached directly to the sternum. They are also called fixed ribs. The 8th to 12th pairs of ribs are not attached to the sternum and are thus called false ribs.

In fact, the 11th and 12th ribs are also called floating ribs as they are only attached directly to the vertebra.

Answer: Sinoatrial (SA) node

The SA node forms part of the conduction system of the heart along with other structures like the atrioventricular node and Purkinje fibres. The SA node is present in the right atrium of the heart. It is called the pacemaker of the heart as it responsible for the rhythm of the heart. Sick sinus syndrome occurs from the dysfunction of the SA node.

Answer: Pancreatic duct

The ampulla of Vater is the other name for the hepatopancreatic duct. The hepatopancreatic duct is formed by the common bile duct and the pancreatic duct. The ampulla of Vater opens into the duodenum through the sphincter of Oddi. It is through this system of ducts that the digestive juices flow into the intestines.

Answer: Fallopian tubes

The fallopian tubes are the location where fertilisation takes place. The ovum is released by the ovary into the fallopian tube. The sperm that is ejaculated into the vagina, travels to the fallopian tube and fertilization takes place when one sperm penetrates the layers of the ovum.

After fertilization, the zygote that is formed gradually moves into the uterine cavity where it attaches to the uterine wall while the embryo grows.

Answer: Cuboid

The carpal bones are found in the upper limb in the region of the wrist. There are eight carpal bones. They are the scaphoid, lunate, triquetral bone, pisiform, trapezium, trapezoid, capitate and hamate.

The cuboid bone is found in the lower limb as part of the tarsal bones. There are seven tarsal bones in each foot and they are calcaneus, navicular, talus, cuboid, and three cuneiform bones.

Answer: Rectus femoris

The biceps femoris, semitendinosus and the semimembranosus muscles form the hamstring in humans. They are found in the posterior part of the thigh. The hamstring muscles are involved in actions at both the knee joint and the hip joint. The hamstrings are very commonly injured during sports. Hamstring tears can be diagnosed with an ultrasound scan. Sometimes, MRI scans may also be required to assess damage to the hamstrings.