Which are the special proteins in muscles that contract and relax to cause movement?

 

Oxygen crosses a plasma membrane by Osmosis.

Lysergic acid diethylamide (LSD) is a drug used as a Hallucinogen.

Phage typing is based on the fact that bacterial viruses attack specific cells. Phage typing is a method used for detecting single strains of bacteria. It is used to trace the source of outbreaks of infections. 

The hypothalamus which is near the pituitary gland is a small region located at the base of the brain. The hypothalamus plays a crucial role in many important functions including releasing hormones, regulating body temperature, regulates hunger etc...

The process that occurs inside the chloroplasts is photosynthesis. The light from the sun is obserbed and combining with water and CO2, plants prepare food for the plants.