SI Session Flashcards
Primary functions of the body
Integumentary - protect underlying tissues
Skeletal - attachment for muscles, protects organs
Muscular - movement
Nervous - regulates and integrates body function via neurons
Endocrine
Positive feedback
- intensifies and enhances the issue
- think the “snowball effect”
Negative feedback
- homeostasis:
- the body’s ability to regulate temp
Examples of positive feedback
Giving birth
Fever not coming down
Blood clotting when the lining of a blood vessel is injured
Receptor
Control center
Effector
Receptor - sense the stimuli and change
Control center - receive the signal from the receptor
Afferent - arriving
Efferent - exiting
Effector - carries out/ responds to send the change
Fever
If you have a fever
Hypothalamus is the control center
Sweating it off is the effect of the stimuli
Transverse/horizontal
Top and bottom
Monomer
Polymer
Smaller building blocks
Chain of them
What is unique about the plasma membrane
It is selectively permeable
Has many phospholipids (head is hydrophilic, tails hydrophobic)
Not everything can get in
Tight junction
Desmosomes
Gap junction
Tight - bladder, GI tract organs
Desmosomes - heart, skin, muscles
Gap - charged particles, and electrical signals
Passive transport
- no use of ATP
- simple diffusion
- facilitated diffusion: helped by the use of protein
Active transport
- uses ATP, goes against the concentration gradient
- the solute pumps a specialized protein
- vesicular
Electrochemical gradient
The way charged particles move -> the change in concentration when a charged particle moves across the membrane
- a combination of the electric and concentration gradients
The four types of tissues
Epithelial
Nervous
Muscle
Connective
Simple vs. stratified
Transitional: urinary organs (stratified)
Pseudostratified: lines upper respiratory tract (simple)
