Bio 1210-Week 2 Human Skull Bones

Which bone is located directly above the maxilla?

• Nasal

• Mandible

• Lacrimal

• Temporal

Answer explanation

The nasal bones are located directly above the maxilla in the facial skeleton. The mandible is below, while the lacrimal and temporal bones are not positioned directly above the maxilla.

Which bone is located at the side of the skull, behind the eye socket?

• Sphenoid

• Ethmoid

• Nasal

• Maxilla

Answer explanation

The sphenoid bone is located at the side of the skull, behind the eye socket, making it the correct answer. The ethmoid is more medial, while the nasal and maxilla bones are located in the front of the face.

What is the function of the skull?

• To support the body

• To protect the brain

• To aid in digestion

• To circulate blood

Answer explanation

The primary function of the skull is to protect the brain from injury. It forms a hard casing around the brain, safeguarding it from external impacts, unlike the other options which do not relate to the skull's role.

Which of the following systems begins with openings in the head?

• Muscular

• Respiratory

• Endocrine

• Nervous

Answer explanation

The respiratory system begins with openings in the head, specifically the nostrils and mouth, which allow air to enter. This distinguishes it from the muscular, endocrine, and nervous systems, which do not start with such openings.

What is the primary structure that protects the brain?

• Spine

• Skull

• Ribcage

• Pelvis

Answer explanation

The primary structure that protects the brain is the skull. It forms a hard barrier that encases the brain, safeguarding it from physical damage, unlike the spine, ribcage, or pelvis, which protect other vital organs.

What is the primary function of the cranial bones?

• Support the digestive system

• Form the brain case or cranium

• Protect the heart

• Aid in movement

Answer explanation

The primary function of the cranial bones is to form the brain case or cranium, which protects the brain from injury and provides structure to the head.

How many facial bones are present in the skull?

• 10

• 12

• 14

• 16

Answer explanation

The human skull contains 14 facial bones, which include the nasal bones, maxillae, zygomatic bones, and others. This makes 14 the correct answer, as the other options do not accurately represent the total number of facial bones.

What do the facial bones protect and support?

• The brain

• The heart

• Entrances to digestive and respiratory tracts

• The spinal cord

Answer explanation

The facial bones primarily protect and support the entrances to the digestive and respiratory tracts, allowing for functions like eating and breathing, while also providing structure to the face.

Which bone is located at the back of the skull?

• Frontal bone

• Parietal bone

• Occipital bone

• Temporal bone

Answer explanation

The occipital bone is located at the back of the skull, forming the base of the cranium. It is distinct from the frontal, parietal, and temporal bones, which are located at the front and sides of the skull.

Which cranial bone is located at the sides of the skull?

• Temporal bone

• Frontal bone

• Ethmoid bone

• Occipital bone

Answer explanation

The temporal bones are located on the sides of the skull, making them the correct answer. The frontal bone is at the forehead, the ethmoid bone is in the nasal area, and the occipital bone is at the back of the skull.