Cell surface or membrane is made of phospholipid bilayer with embedded proteins and sugars. Cell membrane acts as a barrier between cell and its external environment but it is also responsible for the communication with other cells and transport of molecules inside and outside the cell. It is selectively permeable to ions and molecules (some of them pass through the membrane easily, while others require transport proteins or channels). There are 4 ways of molecule transport:
1. Diffusion – no energy required
2. Facilitated transport – transport proteins included
3. Active and co-transport – energy required
4. Vesicle transport (exocytosis and endocytosis)
Microvilli are extensions of cell membrane that increase its surface for diffusion.
Different types of cell junctions have a different influence on the membrane transport. For example, tight junctions are a barrier and the molecules are unable to pass through.
Dermatologist because I understand and know the sophisticated process of the integumentary system which includes the epidermis and dermis and the hypodermics then though the hypodermics is not part of integumentary system.
The correct answer should be A) Cell theory explains cell behavior where a law would describe it
Theories are used to explain phenomena, while laws just describe what will always happen. Such as the law of thermodynamics that describes what is going on inside a room when heat leaves it.
The correct answer is:
"A karyotype can be used for reporting medical concerns and possible genetic disorders
Explanation;
A Karyotype is the number of the chromosome in a cell. In humans, the typical amount of chromosomes is 46. Seldom humans have a varying number of chromosomes and then the karyotype (for example the number) can be used for inscribing for example of genetic disorders- so the answer is that it can be used for reporting of genetic disorders.
