DMD and Inheritance

What happens to DMD muscle cells?

• DMD muscle cells regenerate rapidly due to excess Dystrophin.

• DMD muscle cells tear because they are lacking Dystrophin or Dystrophin is too short.

• DMD muscle cells become larger and stronger with exercise.

• DMD muscle cells are replaced by fat cells over time.

What is the function of Dystrophin?

• To connect sarcomeres to the muscle cell membrane.

• To facilitate oxygen transport in the blood.

• To act as a neurotransmitter in the nervous system.

• To store calcium ions in muscle cells.

What is the role of actin and myosin in muscle contraction?

• Actin and myosin are proteins that interact to cause muscle contraction.

• Actin and myosin are responsible for the production of energy in muscles.

• Actin and myosin help in the repair of muscle tissues after injury.

• Actin and myosin are involved in the storage of calcium in muscle cells.

What are sarcomeres?

• The basic structural units of bone tissue.

• The basic contractile units of muscle tissue.

• The cells responsible for nerve transmission.

• The primary components of blood plasma.

What are enzymes?

• Enzymes are carbohydrates that provide energy to the body.

• Enzymes are proteins that act as catalysts to speed up chemical reactions in the body.

• Enzymes are lipids that store genetic information.

• Enzymes are minerals that help in muscle contraction.

What is the relationship between muscle fibers and myofibrils?

• Myofibrils are the contractile threads found in muscle fibers.

• Muscle fibers are made up of myofibrils and fat cells.

• Myofibrils are a type of muscle fiber that only exists in skeletal muscles.

• Muscle fibers and myofibrils are unrelated structures in the body.

How is DMD inherited?

• Autosomal dominant

• X-linked recessive

• Autosomal recessive

• Y-linked dominant

What can alter the active site of an enzyme?

• A change in temperature

• A change in pH

• A change in substrate concentration

• A change in enzyme concentration

What is Dystrophin?

• A type of muscle fiber

• A protein that helps connect the muscle fibers to the muscle cell membrane.

• A hormone that regulates muscle growth

• A neurotransmitter involved in muscle contraction

Why is Dystrophin important for muscle function?

• It helps maintain the integrity of muscle cells during contraction.

• It provides energy for muscle contractions.

• It acts as a neurotransmitter for muscle signaling.

• It is responsible for muscle growth and repair.