Necturus Dissection And Morphology

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| By Prowlingpangolin
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Prowlingpangolin
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Quizzes Created: 5 | Total Attempts: 33,774
Questions: 30 | Attempts: 109

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Necturus Dissection And Morphology - Quiz

Questions and Answers
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    Explanation
    External gills refer to gills that are located outside the body of an organism. These gills are typically found in aquatic animals, such as certain species of fish and amphibians. They serve the purpose of extracting oxygen from the water, allowing the organism to breathe. External gills are advantageous in aquatic environments as they provide a large surface area for gas exchange. This enables the organism to efficiently obtain oxygen from the water, supporting its respiratory needs.

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  • 3. 

    Explanation
    Hypaxial musculature refers to the muscles located ventral to the axial skeleton, specifically on the anterior side of the body. These muscles are responsible for flexion, lateral flexion, and rotation of the trunk. They include muscles such as the rectus abdominis, external oblique, and internal oblique. These muscles play a crucial role in maintaining posture, supporting the abdominal organs, and facilitating movement of the trunk.

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  • 4. 

    Explanation
    The term "epaxial musculature" refers to the muscles located on the dorsal (back) side of the body. These muscles are responsible for the extension and stabilization of the vertebral column. They include muscles such as the erector spinae, which help maintain posture and allow for movements like bending backward and rotating the trunk. The epaxial musculature plays a crucial role in providing support and movement to the back, making it the correct answer.

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    Explanation
    The rectus abdominis is a paired muscle that runs vertically along the front of the abdomen. It is commonly referred to as the "six-pack" muscle because it is responsible for the appearance of a defined abdominal region. This muscle is involved in flexing the trunk, as well as in stabilizing the pelvis and spine during movements such as sitting up or lifting heavy objects.

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  • 8. 

    Explanation
    The term "linea alba" refers to a Latin phrase that translates to "white line." In anatomy, it is used to describe a vertical line of connective tissue that runs down the midline of the abdomen, separating the left and right rectus abdominis muscles. This line is often more visible in pregnant women and is a common site for surgical incisions.

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  • 9. 

    Explanation
    The external oblique is a muscle located on the lateral sides of the abdomen. It is responsible for flexing and rotating the trunk, as well as compressing the abdominal contents. This muscle is important for maintaining posture and providing stability to the core. It is also involved in activities such as bending, twisting, and side-bending movements of the torso.

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  • 10. 

    Explanation
    The internal oblique is a muscle located in the abdominal wall. It is one of the muscles responsible for rotating and flexing the trunk, as well as providing support and stability to the core. This muscle is located deep within the abdomen, running diagonally from the lower ribs to the pelvis. When contracted, it aids in compressing the abdominal contents and helps with forced expiration. The internal oblique works in conjunction with other muscles in the core to provide strength and stability during various movements and activities.

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    Explanation
    The coracobrachialis is a muscle located in the upper arm. It originates from the coracoid process of the scapula and inserts into the middle of the humerus. Its main function is to flex and adduct the arm at the shoulder joint. It also assists in stabilizing the shoulder joint during certain movements.

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  • 25. 

    Explanation
    The triceps brachii is a muscle located on the back of the upper arm. It is responsible for extending the elbow joint and straightening the arm. It consists of three heads: the long head, lateral head, and medial head. The triceps brachii is an important muscle for activities that involve pushing or extending the arm, such as throwing a ball or performing a push-up.

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  • 26. 

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    Explanation
    The correct answer is "latissimus dorsi." The latissimus dorsi is a large muscle located in the back. It is responsible for movements such as pulling the arms down and back, as well as rotating the arms inward. This muscle is commonly targeted in exercises such as pull-ups and lat pulldowns to strengthen and develop the back muscles.

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  • 28. 

    Explanation
    The falciform ligament is a fold of peritoneum that attaches the liver to the anterior abdominal wall and diaphragm. It is shaped like a sickle and divides the liver into right and left lobes. The falciform ligament also contains the ligamentum teres, which is the remnant of the fetal umbilical vein. Its main function is to provide support and stabilization to the liver.

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