Exam 3 Dr. Mon

Front

What happens to skeletal muscle that is regularly stimulated?

Back

Skeletal muscle that is regularly stimulated does not atrophy; it typically maintains or increases in size and strength.

Front

What is depolarization in terms of membrane potential?

Back

Depolarization is the event where Na+ influx causes the membrane potential to become more positive.

Front

What is a characteristic of graded potentials?

Back

Graded potentials can decrease in intensity over time and distance.

Front

Does anaerobic training require oxygen?

Back

Anaerobic training requires no O2; it is performed in the absence of oxygen.

Front

What type of lever is a first-class lever?

Back

A first-class lever is a lever where the fulcrum is positioned between the effort and the load.

Front

What is atrophy in muscle tissue?

Back

Atrophy is the decrease in muscle mass and strength due to lack of use or stimulation.

Front

What is hyperpolarization?

Back

Hyperpolarization is an increase in membrane potential, making the inside of the cell more negative.

Front

What is the role of sodium ions (Na+) in action potentials?

Back

Sodium ions (Na+) play a crucial role in depolarization during action potentials by entering the cell.

Front

What is the difference between aerobic and anaerobic exercise?

Back

Aerobic exercise requires oxygen for energy production, while anaerobic exercise does not.

Front

What is the significance of the threshold potential?

Back

The threshold potential is the critical level to which a membrane must be depolarized to initiate an action potential.