WEEK 1 - BODY STRUCTURE & HOMEOSTASIS Flashcards
What is Anatomy?
The study of the structure of body parts and their relationship to one another.
What is Physiology?
The study of the function of the body’s structural machinery.
What is Anatomical Variability?
- No two humans are exactly aline in external and internal anatomy.
- 70% of the anatomy in textbook are common to the population.
- 30% are anatomically variant such as number of organs, muscles or location of it.
What is Physiological Variability?
- Sex
- Age
- Diet
- Weight
- Physical activity
- Your Microbiota
What is molecules and what level is it in the structural hierarchy?
- 1st level
- Composed of at least two atoms.
What is organelles and what level is it in the structural hierarchy?
- 2nd level
- Composed of molecules
What is cells and what level is it in the structural hierarchy?
- 3rd level
- Composed of organelles
What is tissues and what level is it in the structural hierarchy?
- 4th level
- Composed of cells
What is organs and what level is it in the structural hierarchy?
- 5th level
- Composed of tissues
What is organ system and what level is it in the structural hierarchy?
- 6th level
- Composed of organs
What is living system and what level is it in the structural hierarchy?
- 7th level
- Composed of organ systems
What is Homeostasis?
- The ability to maintain internal stability.
- The ability to detect change within the body, and activate mechanism that reverse it, resulting in maintaining relatively stable internal environment within a ‘normal’ range.
What factors interact to maintain homeostasis?
- Communication within body is essential
- Nervous system: electrical impulses delivered by nerves
- Endocrine system: secretes chemical messengers (hormones) into blood
- Immune and microbial systems
What is a receptor in the control system?
Body structure senses change (e.g., temperature nerve endings in skin)
What is integrating center in the control system?
Processes information, ‘makes a decision’ and directs response
