The function of the goblet cells is to produce mucus that protects parts of the digestive organs from the effects of powerful enzymes needed for food digestion.
A cell membrane is semi-permeable. This means that it is size-specific. It allows only a particular maximum size of particles to pass through it. Large molecules such as plasma proteins and lipid molecules cannot therefore penetrate while small moecules such as glucose will easily diffuse across it.
Secondly, a cell membrane is charged. The charge is as a result of a difference in ionization between the intracellular fluid and the extracellular fluid. Substances that have the same charge as the fluid into which they are diffusing will be hard to asorb due to repulsion effect. On the other hand, substances that have opposite charge as the fluid into which they are diffusing will be absorbed easily and faster.
Finally, the cell membrane is made of two layers. Lipid layer and phospholipid layer. Inside these layers, there are embedded particles and substances such as enzymes, receptors, hormones and ion channels. During diffusion of substances across cell membrane, some substances are speeded up by these substances. For instance, Translocase enzyme in the membrane of mitochondria speeds up the transfer of Carnitine transferase into the mitochondrial matrix.
Answer:
C. Extreme heat and pressure from deep within the earth causes changes to rock's appearance, structure, and composition.
Explanation:
Metamorphic rocks are formed by the physical or chemical alteration by heat and pressure of an existing igneous rock or sedimentary rock into a denser form.
Answer:
O The ability to play the piano is influenced by genetics as well as the environment.
Explanation:
Since Joyce and Tim both started lessons at the same time, and practice the same amount these factors do not explain why Joyce is better than Tim. That means that C cannot be correct. Next D and A cannot be correct since they don't state anything that could explain why Joyce is better than Tim, they only say random facts about piano playing that could be true.
