Stephen Hawking dismisses belief in God in an exclusive interview with the Guardian. Photograph: Solar & Heliospheric Observatory/Discovery Channel T he belief that heaven or an afterlife awaits us is a fairy story for people afraid of death, Stephen Hawking has said. In a dismissal that underlines his firm rejection of religious comforts, Britain's most eminent scientist said there was nothing beyond the moment when the brain flickers for the final time.
How are the tails and heads of membrane phospholipids oriented in their environment? a. The hydrophobic heads are oriented towards each other and the hydrophillic tails are oriented towards the extracellular fluid and the intracellular fluid.
The hydrophilic (water loving) polar heads ofthe phospholipid molecules face the outside and inside ofthe cell where water is found, and the hydrophobic (waterfearing) nonpolar tails face each other (Fig. 4.1). Inaddition to phospholipids, there are two other types oflipids in the plasma membrane.2 4.3 Diffusion and Osmosis â¢ Molecules spontaneously diffuse (move from anarea of higher concentration to an area of lowerconcentration), and some can diffuse across aplasma membrane. 73â¢ Water diffuses across the plasma membrane, andthis can affect cell size and shape.