Human Anatomy and Physiology : Bones

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

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Example Questions

Example Question #388 : Gross Anatomy

What suture runs laterally from the top of the cranium and ties together the frontal and two parietal bones?

Possible Answers:

Sagittal suture

Squamosal suture

Coronal suture

Basilar suture

Lambdoidal suture

Correct answer:

Coronal suture

Explanation:

The coronal (frontal) suture runs laterally from the top of the cranium and ties together the frontal and two parietal bones.

The sagittal suture runs along the top of the cranium, between the two parietal bones. The lambdoidal suture ties together the occipital and two parietal bones on the posterior cranium. The squamosal suture is the area where the squamosal section of the temporal bone is beveled and overlaps the parietal bone. The basilar suture, also referred to as spheno-occipital synchondrosis, is a suture between the occipital and sphenoid bones.

Example Question #381 : Gross Anatomy

What suture runs between the temporal bone and the parietal bone?

Possible Answers:

Squamosal suture

Sagittal suture

Basilar suture

Coronal suture

Lambdoidal suture

Correct answer:

Squamosal suture

Explanation:

The squamosal suture is the area where the squamosal section of the temporal bone is beveled and overlaps the parietal bone.

The sagittal suture runs along the top of the cranium, between the two parietal bones. The coronal suture runs laterally from the top of the cranium and ties together the frontal and two parietal bones. The lambdoidal suture ties together the occipital and two parietal bones on the posterior cranium. The basilar suture, also referred to as spheno-occipital synchondrosis, is a suture between the occipital and sphenoid bones.

Example Question #381 : Gross Anatomy

What suture runs between the two parietal bones, running antero-posteriorally along the top of the cranium?

Possible Answers:

Squamosal suture

Coronal suture

Basilar suture

Sagittal suture

Lambdoidal suture

Correct answer:

Sagittal suture

Explanation:

The sagittal suture is the long suture that runs between the two parietal bones, running antero-posteriorally along the top of the cranium.

The coronal suture runs laterally from the top of the cranium and ties together the frontal and two parietal bones. The lambdoidal suture ties together the occipital and two parietal bones on the posterior cranium. The squamosal suture is the area where the squamosal section of the temporal bone is beveled and overlaps the parietal bone. The basilar suture, also referred to as spheno-occipital synchondrosis, is a suture between the occipital and sphenoid bones.

Example Question #51 : Identifying Bones Of The Skull

Which nerve passes through the optic canal?

Possible Answers:

Cranial nerve IV

Cranial nerve II

Opthalmic branch of cranial nerve V

Cranial nerve III

Cranial nerve X

Correct answer:

Cranial nerve II

Explanation:

The optic canal is also referred to as the optic foramen. It is a short canal through the lesser wing of the sphenoid bone. The optic canal transmits the optic nerve (cranial nerve II) and the ophthalmic artery into the orbital cavity. 

Example Question #52 : Identifying Bones Of The Skull

A portion of the trigeminal nerve emerges from which foramen?

Possible Answers:

Foramen magnum

Foramen ovale

Obturator foramen

Jugular foramen

Cribriform plate

Correct answer:

Foramen ovale

Explanation:

The three branches of the trigeminal nerve, the ophthalmic, maxillary, and mandibular branches leave the skull through three separate foramina. The opthalmic branch exits through the superior orbital fissure, the maxillary branch exists through the foramen rotundum, and the mandibular branch exits through the foramen ovale. 

The spinal cord, accessory nerve, and various arteries pass through the foramen magnum. The cribriform plate allows the emergence of the olfactory nerve. The obturator foramen is in the hip.

Example Question #53 : Identifying Bones Of The Skull

Where is the lambdoid suture located?

Possible Answers:

Between the parietal bones and the temporal bones

Between the temporal bones and the parietal bones

Between the parietal bones and the occipital bone

Between parietal bones

Between the frontal bone and the parietal bones

Correct answer:

Between the parietal bones and the occipital bone

Explanation:

Humans skulls contain sutures, which are dense fibrous connective tissue joints that holds the bony plates of the skull together. The lambdoid suture connects the parietal bones with the occipital bone. This suture is actually continuous with the occipitomastoid suture.

Example Question #184 : Bones

Which bones are a part of the axial skeleton?

Possible Answers:

Bones of the head

Bones of the arms

Bones of the legs

Bones of the fingers

Correct answer:

Bones of the head

Explanation:

The skeletal system is divided into the axial skeleton and the appendicular skeleton. The axial skeleton consists of bones of the head, ribs, vertebral column, and sternum. In contrast, the appendicular skeleton consists of bones of the extremities, including the fingers, arms, and legs.

Example Question #394 : Gross Anatomy

Which structure separates the parietal bones from the occipital bone?

Possible Answers:

None of these

Coronal suture

Lambdoid suture

Inferior nuchal line

Sagittal suture

Correct answer:

Lambdoid suture

Explanation:

The lambdoid suture is located between the parietal bones and the occipital bone. When looked at with the sagittal suture from a posterior view, it creates a lambda shape.

Example Question #62 : Identifying Bones Of The Skull

Which of the following is not a part of the ethmoid bone?

Possible Answers:

Perpendicular plate

Crista galli

Middle nasal concha

Pterygoid processes

Cribriform plate

Correct answer:

Pterygoid processes

Explanation:

The pterygoid processes are inferior projections from the greater wings of the sphenoid bone. They attach to muscles that help with mastication.

Example Question #63 : Identifying Bones Of The Skull

Which cranial bone forms the posterior base of the skull?

Possible Answers:

Occipital

Parietal

Frontal

Temporal

Mandible

Correct answer:

Occipital

Explanation:

The occipital bone is located at the posterior aspect of the head, inferior to the parietal bones. It contains a large opening called the foramen magnum which allows connection of the brain and spinal cord.

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