Question

Explain the steps the steroid hormone testosterone would take to stimulate the production of enzymes and structural proteins in skeletal muscle fibers, causing an increase in muscle size and strength

Answer 1

Testosterone stimulates the production of enzymes and structural proteins in skeletal muscle fibers, leading to an increase in muscle size and strength.

Step-by-step explanation:

The steroid hormone testosterone stimulates the production of enzymes and structural proteins in skeletal muscle fibers through a series of steps:

1. Binding to a receptor: Testosterone enters the muscle cells and binds to specific receptor proteins.
2. Formation of a complex: The testosterone-receptor complex combines with DNA, forming a receptor protein-hormone complex.
3. Enhancement of enzyme synthesis: This complex binds to specific sites on DNA and initiates or enhances the synthesis of messenger RNA (mRNA).
4. Protein synthesis: The mRNA then directs the synthesis of proteins, including enzymes and structural proteins, in the muscle fibers.
5. Increased muscle size and strength: The production of these enzymes and structural proteins leads to an increase in muscle size and strength.