Diffusion refers to the net movement of molecules from higher to lower concentration. Diffusion may be a simple diffusion or . A simple diffusion is one in which that occurs unassisted. Facilitated diffusion in contrast is an assisted diffusion in a way that it requires a carrier molecule. For instance, polar molecules diffuse across a cell membrane through carrier molecules in the cell membrane.
Symptoms of Thanatophobia. The mere mention of death or images or thoughts thereof can trigger a crippling anxiety in the patient. Physical Symptoms: Dizziness, dry mouth, sweating, palpitations, nausea, stomach pain, trembling, sensation of choking, chest pain or discomfort, hot or cold flashes, numbness and tingling sensations.
Symptoms vary depending on the type of anxiety disorder, but general symptoms include: 1  Feelings of panic, fear, and uneasiness. 2  Problems sleeping. 3  Cold or sweaty hands and/or feet.4  Shortness of breath. 5  Heart palpitations. 6  An inability to be still and calm. 7  Dry mouth. 8  Numbness or tingling in the hands or feet.ymptoms vary depending on the type of anxiety disorder, but general symptoms include: 1  Feelings of panic, fear, and uneasiness. 2  Problems sleeping. 3  Cold or sweaty hands and/or feet. 4  Shortness of breath.