How Do Ray-Finned Fish Keep from Sinking

question 17

Multiple Choice

How do ray-finned fish keep from sinking?  

• A)they are constantly swimming
• B)their fins are constantly moving
• C)they have lungs that are always filled with air
• D)they have a swim bladder that is filled with gas
• E)they have a skeleton that is less dense than the surrounding water

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Definitions:

Internal Intercostals

Muscles located between the ribs that assist with respiratory movements, particularly forced exhalation.

Rectus Femoris

One of the four quadriceps muscles of the thigh, playing a crucial role in knee extension and hip flexion.

Muscle Shape

Refers to the physical form or structure of muscles, which varies depending on their location and function in the body.

Pennate

Referring to a type of muscle fiber arrangement that resembles a feather, in which the fascicles attach obliquely to a central tendon.