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LECTURE OBJECTIVES (Instructional goals)AT THE END OF THIS CHAPTER, YOU SHOULD BE ABLE TO:
1. Understand how the human body maintains a rather constant internal environment despite changing external conditions.
2. Know the components and mechanism of homeostasis, and use temperature regulation to describe the mechanism.
3. Define and discuss negative and positive feedback mechanisms.
4. Describe a reflex arc (This is in the nervous system chapter, and may not be required all semesters.)
5. Define selected key terms (see textbook).
LECTURE QUIZ
Give the missing levels of biological organization (in correct order):
i. SUBATOMIC PARTICLE ii. Atom iii. Molecule iv. MACROMOLECULE
v. Organelle vi. Cell vii. Tissue
viii. Organ ix. Organ System x. Organism
xi. Population xii. Community
xiii. Ecosystem
xiv. LANDSCAPE xv. Biosphere
Name the three components of homeostasis and give an example:
1. Receptor (component receives a stimuli)
example: skin thermoreceptors
2. Integrator (component processes information)
example: brain
3. Effector (component carries out a response to a stimuli)
example: muscles
Give three examples of homeostasis in the human body:
7. blood glucose
8. blood pH
9. blood pressure
Give an example of :
10. negative feedback in homeostasis normal human body temperature
11. positive feedback in homeostasis labor (child birth)
12. A physiological state in which the physical and chemical conditions of the internal environment are being maintained within tolerable ranges:
Homeostasis
13. Correct sequence involved in the regulation of organ systems:
Stimulus - Receptor - Integrator - Effector - response
14. The integrator in most feedback mechanisms: the brain
15. The integrator in a reflex arc: interneuron in the spinal cord
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