Biology, 29.10.2019 21:31 sherlock19

Which of the following statements is not correct about the hyoid bone? a it is anterior to the vertebral columnb it is positioned between the mandible and the larynx (voice box)c it articulates with the temporal boned it serves as an attachment point for some muscles of the tonguee it serves as an attachment point for some muscles of the neck and pharynx

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Answer from: ohgeezy

Option C. It articulates with the temporal bone.

Explanation:

HYOID BONE:

Introduction and Osteology:

Hyoid bone is also known as lingual bone or tongue bone. It is a mobile bone and is unique as it does not articulate (unite, join) with any other bone in the human skeleton.

Hyoid bone is a part of axial skeleton and one of the bones of the neck. It is located in anterior part of the neck. The other bones which consitute the skeleton of neck are: cervical vertebrae, clavicles and manubrium of sternum (brestbone).

It is horseshoe-shaped and consists of a body, two greater horns and two lesser horns.

Body is the middle part of hyoid bone. It faces anteriorly.

Each end of the body is connected to a greater horn which projects posterosuperioly. Near the junction of greater horn and body, a smaller lesser horn projects superoposteriorly from superior surface of body.

LOCATION:

It is located anterior to vertebral column in the angle between the mandible (jawbone) and thyroid cartilage (largest cartilage of larynx/voice box) at the level of C3 vertebra.

ATTACHMENTS:

It does not articulate with any other bone in the human body. It is connected to bones only by other muscles or ligaments.

It is suspended by various muscles and ligaments.

Hyoid bone connects with muslces of the mouth and tongue from above, larynx (thyroid cartilage) below and pharynx behind. It is also serves as an attachment site for various anterior neck muscles.

QUESTION:

Coming back to the question, the incorrect statement is asked.

A- it is anterior to the vertebral column.

This is a correct statement as hyoid bone is located anterior to vertebral column in the anterior part of neck at the level of C3 vertebra.

B- It is positioned between mandible and the larynx (voice box)

This is also a correct statement as Hyoid bone is located between mandible (jawbone) and larynx (voice box).

C- It articulates with the temporal bone.

This is an incorrect statement and is the answer of the question as we are asked to pick out the incorrect statement.

Hyoid bone does not articulate with any bone in the skeleton. It articulates with other bones only via other muscles or ligaments.

D- It serves as an attachment point for some muscles of tongue.

This is a correct statement. Hyoid bone is connected to various tongue muscles. Another name for hyoid bone is lingual bone or tongue bone.

E- it serves as an attachment point for some muscles of neck and pharynx.

This is a correct statemt as hyoid bone provides attachments to some mucles of neck and pharynx. Functionally, hyoid bone helps in swallowing and keeping the airway patent (open).

Answer from: Quest

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Answer from: Quest

Environmental science studies the interactions between the physical, chemical, and biological components of the environment, including their effects on all types of organisms. earth science (also known as geoscience), is an inclusive term for all sciences related to earth (geology, meteorology, oceanogr maphy, etc). although environmental and earth science cover essentially the same material, environmental science places greater emphasis on the biological realm, while earth science places greater emphasis on the physical realm. environmental and earth science study the interactions of four major systems or “spheres” (figure 8.6). the geosphere consists of the core, mantle and crust of the earth.the atmosphere contains all of the earth’s air and is divided into troposphere, stratosphere, mesosphere, thermosphere and ionosphere.the hydrosphere contains all of the solid, liquid and gaseous water on earth, extending from the depths of the sea to the upper reaches of the troposphere where water is found. ninety-seven percent of the hydrosphere is found in salty oceans, and the remainder is found as vapor or droplets in the atmosphere and as liquid in ground water, lakes, rivers, glaciers and snowfields. the biosphere is the collection of all earth’s life forms, distributed in major life zones known as biomes: tundra, boreal forest, temperate deciduous forest, temperate grassland, desert, savannah, tropical rainforest, chaparral, freshwater, and marine.although the four systems have their unique identities, there is substantial interaction between them. environmental scientists study the effects of events in one sphere on the other spheres. for example, a volcanic eruption in the geosphere may cause profound direct and indirect effects on the hydrosphere, atmosphere and biosphere as follows: example 1 (volcano) on may 18, 1980, mount saint helens, in the state of washington, erupted. this event altered the surrounding environment, and provided scientists with an opportunity to study the effects of volcanic eruptions on the geosphere, hydrosphere, atmosphere and biosphere. such studies are vital because volcanic eruptions will continue to occur, and will have increasing impact on humans as people continue to settle lands closer to dormant volcanoes. the following are but a few of the myriad of interactions resulting from a volcanic