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The body cavities that protect the nervous system are located in the

A.

Dorsal

B.

ventral

C.

vertebral

D.

thoracic

E.

cranial Cavity

Answer and Explanation

The Correct Answer is A

A. Dorsal: The dorsal body cavity protects the central nervous system and is subdivided into the cranial cavity, which encloses the brain, and the vertebral cavity, which encloses the spinal cord. Together, these cavities provide rigid protection by surrounding nervous tissue with bone.

B. Ventral: The ventral cavity contains organs such as the lungs, heart, and abdominal viscera. It is not the primary cavity responsible for protecting the nervous system, as it mainly houses thoracic and abdominopelvic organs.

C. Vertebral: The vertebral cavity specifically encloses and protects the spinal cord. While it is part of the system that safeguards the nervous system, it is only one subdivision of the dorsal cavity rather than the overall cavity protecting the nervous system.

D. Thoracic: The thoracic cavity lies within the ventral body cavity and contains the lungs and heart. It is not associated with protection of the brain or spinal cord, so it does not serve the role of safeguarding the nervous system.

E. Cranial cavity: The cranial cavity encases and protects the brain. Like the vertebral cavity, it is part of the dorsal cavity, but it represents only one subdivision rather than the complete system of protection for the nervous system.


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Related Questions

Correct Answer is B

Explanation

A. Complex tissue: While tissues are made up of similar cells working together, a complex tissue is not composed of multiple tissue types and therefore does not perform the broader functions of an organ.

B. Organ: An organ is composed of two or more tissue types that work together to perform specific functions, such as the heart pumping blood or the liver detoxifying substances. This combination of tissues allows organs to carry out specialized physiological tasks.

C. Complex cell: Cells are the basic structural and functional units of life, but a single cell, no matter how complex, does not consist of multiple tissue types.

D. Organ system: An organ system is a higher-level organization consisting of multiple organs that coordinate to perform broad physiological functions, rather than being a single structure composed of multiple tissue types.

Correct Answer is B

Explanation

A. One: A molecule with a single phosphate group is called AMP (adenosine monophosphate), not ADP.

B. Two: ADP (adenosine diphosphate) has two phosphate groups attached to the adenosine molecule. It functions as an energy carrier, and when a third phosphate is added, it becomes ATP.

C. Three: A molecule with three phosphate groups is ATP (adenosine triphosphate), which stores more energy than ADP.

D. None: Molecules with no phosphate groups would not be classified as ADP. The presence of two phosphates is essential for ADP’s role in energy transfer.

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