Exam 21: Movement and Muscle at Work: Plasticity in Response to Use and Disuse

Refer to the figure showing the changes in heart mass of Burmese pythons 3 days after feeding (DPF), infusion with plasma from fed or fasted snakes, or infusion with a solution of bovine serum albumin (BSA) with or without three specific fatty acids (FA) found in blood of fed snakes. According to the figure, feeding increases heart mass primarily through

Which statement about muscle atrophy is true?

In skeletal muscle cells, endurance exercise training typically produces

Endurance exercise generates signals in muscle cells, such as

Resistance exercise involves _______ repetitions per unit time of movements involving _______ force and _______ metabolism.

Which drug would likely be the most effective for restoring muscle mass in a cancer patient undergoing chemotherapy?

The dynamic nature of muscle tissue is known as

Atrophy of muscles due to disuse is accompanied by a shift in fiber type from _______ fibers to _______ fibers.

In humans, endurance training typically causes _______ muscle fibers to be converted to _______.

Which drug would likely be the most effective for restoring muscle mass in a cancer patient undergoing chemotherapy?

Isoforms of myosin are

Refer to the figure shown. If the muscle represented in the figure can produce a maximal force of 20 N and has a V_max of 1 m/s, what is its maximal power output?

Sarcopenia, or age-related loss of muscle mass, is

Endurance training increases the amounts of both glycogen and lipid stored in muscle cells. This most directly increases the

Refer to the figure shown. What best explains the results for the experimental group of mice on the right of the figure?

The recruitment order of different fiber types matches and reinforces their cellular properties because

Explain how the cellular effects of endurance training improve the balance between ATP supply and demand during extended exercise. Refer to specific changes that occur and indicate whether they increase or decrease ATP supply or ATP demand.

Adding structural proteins to individual muscle cells is known as

Cachexia, or muscle wasting (loss of muscle mass), is a common complication of cancer. A muscle biopsy sample from a cancer patient would likely show

A single motor unit typically consists of