Chapter 1 Flashcards
Anatomy
Structure
Physiology
Function
Level of structural organization
Chemical level → cellular level → tissue level → organ level → organ system level → organism level
Integumentary system
Protects deep tissues ( e.g. Skin, oil / sweet gland, hair , nails)
Skeletal System
Protects/ supports body organs ( bones, joints, cartilage, ligaments)
Muscular system
Allows movement/ motion ( muscles/tendons)
Nervous system
Control system of the body ( brain, spine column, nerves )
Necessary Life Functions
Maintaining boundaries, movement , responsiveness , digestion, metabolism, excretion, reproduction, growth
Survival needs
Nutrients, oxygen, water, normal body temperature, atmospheric pressure
Homeostasis
Ability to maintain relatively stable internal conditions in the face of a changing external conditions
When is the body in homeostasis?
When it’s needs are adequately met and functioning smoothly
3 components of homeostasis
- Receptor
- Control enter
- Effector
Homeostasis step 1
Stimulus- produces change
Homeostasis step 2.
Receptor- detects change
Homeostasis Step 3
Input- info sent along afferent pathway to control center
Homeostasis Step 4
Output- info sent along the efferent pathway to the effector
Homeostasis Step 5
Response of effector feeds back to reduce the effect of the stimulus and returns variable to homeostatic level
negative feedback
reduces stimulus/stress
Regulation of blood glucose
negative feedback
Regulation of body temperature
negative feedback
positive feedback
increase stimulus/stress
Blood clotting is what type of feedback?
positive feedback
Pregnancy/childbirth is what type of feedback?
positive feedback
Fever/ immune response is what type of feedback?
Positive feedback
