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.
These are signs that a person may suffer from both anxiety disorder and depression 1  : Constant, irrational fear and worry. 2  Physical symptoms like rapid heartbeat, fatigue, headaches, hot flashes, sweating, abdominal pain, and difficulty breathing. 3  Insomnia. 4  Changes in eating, either too much or too little.