Question

Cross-sectional area of muscle increases after acclimation at altitude.
a.True
b.False

Answer 1

It is false that the cross-sectional area of muscle increases after altitude acclimation. The heart is made of cardiac muscle, not smooth muscle. And, sprinting is an anaerobic exercise.

Step-by-step explanation:

True or False: Cross-sectional area of muscle increases after acclimation at altitude

The student's question pertains to the effects of altitude acclimation on muscle cross-sectional area. This is a false statement. When acclimating to high altitude, the body undergoes a series of adaptations to cope with lower oxygen levels, but increasing the cross-sectional area of muscle is not typically one of them. Instead, acclimation can lead to an increase in the number of red blood cells and a higher efficiency of oxygen delivery to tissues. Muscle hypertrophy, or an increase in muscle mass, usually occurs through resistance training and is associated with an increase in the number of sarcomeres and myofibrils within the skeletal muscle, not altitude acclimation.

26. True or False. The heart consists of smooth muscle tissue.

This statement is false. The heart is composed of a specialized type of muscle called cardiac muscle, not smooth muscle. Cardiac muscle has unique features, such as intercalated discs that allow for synchronized contractions, which are essential for effective pumping of the heart.

27. True or False. Sprinting is considered an anaerobic exercise

True. Sprinting is an example of an anaerobic exercise because it is performed in short, intense bursts that do not rely on the body's oxygen supply. Instead, anaerobic exercises use energy sources stored within the muscles, such as phosphocreatine and glycogen.

Answer 2

The statement that the cross-sectional area of muscle increases after acclimation at altitude is true.
The cross-sectional area of muscle increases after acclimation at altitude.

Step-by-step explanation:

The statement that the cross-sectional area of muscle increases after acclimation at altitude is true.

When individuals acclimate to high altitude environments, their bodies undergo physiological changes to adapt to the decreased oxygen levels. In response to this, the body increases the size of muscle fibers, resulting in an increase in the cross-sectional area of the muscle. This adaptation helps to improve oxygen delivery and overall muscle function at high altitudes.

For example, studies have shown that individuals who spend a significant amount of time at high altitudes exhibit greater muscle fiber size compared to individuals living at lower altitudes.