Refers to the basic processes by which sensory organs and the nervous system respond to stimuli in the environment, and refers to the meaningful interpretations extracted from it.

SENSATION refers to the basic processes by which sensory organs and the nervous system respond to stimuli in the environment, and Perception refers to the meaningful interpretations extracted from it.

Explanation:

The receptors present in the body at different locations sense the changes in inner and outer conditions. A particular receptor is activated by specific stimuli such as thermoreceptors sense the change in the temperatures. This process of detecting the stimuli is followed by the transduction of the stimuli and generation of nerve impulses to send the information to the central nervous system. The whole process is called sensation.

The sensory information sent to the central nervous system is processed and interpreted mainly in the cerebral cortex. This is called perception.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.