Question

Of the following statements about the muscle tissue of cruising and lunging fish, which is/are true? Choose all that apply.

O Lungers have mostly red muscle tissue.
O White muscle tissue has increased levels of myoglobin compared to red muscle tissue.
O Red muscle tissue is designed for quick bursts of speed.
O White muscle tissue is designed for sustained, long-distance travel.
O Cruisers have a mix of red and white muscle tissue.
O Red muscle tissue supports high metabolic rates and is good for endurance.

Answer 1

The correct statements about fish muscle tissue are that lungers have predominantly red muscle tissue, and cruisers possess a mix of both red and white muscle tissue. Red muscle tissue is high in myoglobin and good for endurance, while white muscle tissue is designed for quick bursts of speed.

Step-by-step explanation:

Among the statements about the muscle tissue of cruising and lunging fish, the two true statements are that lungers have mostly red muscle tissue and cruisers have a mix of red and white muscle tissue. Red muscle tissue, which is abundant in myoglobin and mitochondria, supports aerobic activity, making it suitable for endurance and sustained swimming as seen in cruisers. White muscle tissue, which contains fewer myoglobin and mitochondria but is capable of greater contractile speed, is typical in lungers who rely on brief, rapid bursts of speed to catch their prey.

The incorrect statements include that white muscle tissue has increased levels of myoglobin compared to red tissue, red muscle tissue is designed for quick bursts of speed, and that white muscle tissue is designed for long-distance travel. Red muscle tissue is actually higher in myoglobin and designed for endurance, while white muscle tissue is adapted for quick, high-intensity bursts of activity but not for sustainment over long distances.