Structuralism used the practice of introspection to study consciousness.
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Answer:
In a fibrous joint the bones which are adjacent to each other are connected by fibrous connective tissues, mainly collagen, with out forming any cavity of joint.
Explanation:
- The fibrous joints and not movable and cover important structures like brain being covered by skull bones which are articulated by fibrous joints namely sutures.
- Long bones too are stabilized by this type fibrous joints as is formed between radius and ulnar bone of forearm.
- Another important fibrous joint is in between the root of the teeth and gum sockets in maxillary region. Here fibrous joint binds the teeth firmly so that continuous motion and pressure during eating may not loosen it.
Answer:
The environments in which cells grow often change rapidly. For example, cells may consume all of a particular food source and must utilize others. To survive in a changing world, cells evolved mechanisms for adjusting their biochemistry in response to signals indicating environmental change. The adjustments can take many forms, including changes in the activities of preexisting enzyme molecules, changes in the rates of synthesis of new enzyme molecules, and changes in membrane-transport processes.
Initially, the detection of environmental signals occurred inside cells. Chemicals that could pass into cells, either by diffusion through the cell membrane or by the action of transport proteins, and could bind directly to proteins inside the cell and modulate their activities.
