Describe how negative and positive feedback maintains body homeostasis.
Negative feedback is when a correction that involves a certain action that directly apposes the initial stimulus. It basically reduces the effects of the given fluctuations and produces stability. An example would be the body regulating pH levels. Positive feedback is when the stimulus produces a response that results in a greater stimulus. An example would be labor contractions.
Discuss hydrophobicity and the 2nd Law of Thermodynamics and how they relate to each other?
1. The 2nd Law of Thermodynamics is the total entropy of a system and its surroundings always increases in a spontaneous process 2. In the science of chemistry, hydrophobicity is the physical property of a molecule that is seemingly repelled from a mass of water. - Water molecules will form a relatively ordered cage around a nonpolar molecule - When the nonpolar molecules coalesce in aqueous solution, they release water molecules and increase net disorder or entropy - Phase segregation is spontaneous and requires no energy input
Distinguish between actions of agonists and antagonists and explain importance.
An agonist is a ligand that binds to receptor and activates it - Agonists can release hormones that are needed to regulate homeostasis Antagonist is a ligand that binds to a receptor and does not activate it. - Antagonists can bind to receptors and stop harmful effects.