Beta-1 receptors are a type of protein found on the surface of certain cells in the body, particularly in the heart. They belong to a larger family of receptors known as beta-adrenergic receptors, which respond to hormones like epinephrine and norepinephrine. When activated, beta-1 receptors increase heart rate and the force of heart contractions, playing a crucial role in the body's response to stress and physical activity. These receptors are important in regulating cardiovascular function and are a target for certain medications. Drugs that block beta-1 receptors, known as beta-blockers, are commonly used to treat conditions such as high blood pressure and heart failure, helping to reduce the workload on the heart.