Endocrine glands produce hormones (peptides, proteins, lipids) which fit into specific receptor molecules on target cells to trigger a change in intercellular activity
Homeostasis: maintenance of constant internal body environment.
Two systems are involved:
1) Sympathetic nervous system (stimulates)
2) Parasympathetic nervous system (inhibits)
Advantages:
- homeostatic mechanism increases the change and brings factor further from resting level
Disadvantages:
- homeostatic mechanism reverses the change and restores factor to resting level
In the dermis, there are receptors to different stimuli:
1) thermoreceptors
2) pacinian corpuscles
3) meissner’s corpuscles
4) free nerve endings
For thermoregulation, there are two types of organism:
1) endotherms (produce and maintain body temp.)
2) exotherms (rely on environment to maintain body temp.)
