Physiology Lec 1 Flashcards
(39 cards)
of cell types in body?
200
of neuron types
3
of muscle cell types
3
Name the 3 muscle cell types
- smooth 2. skeletal 3. cardiac
The only voluntary muscles?
Skeletal
The only voluntary smooth muscle?
Diaphragm
Sheet like layer of cells that line external body surfaces, line hollow body tubes and organs, and function as a transport membrane?
Ephithelium
Most diverse of the 4 cell types
connective tissue cells
Anchors and links structures of the body.
connective tissue cells
Organization of th body
cells, tissues, organs, organ systems, organism.
What is a determinant for the type of cell?
the type of tissue
Name the organ systems
circulatory, digestive, respiratory, urinary, skeletal, muscular, integumentary, immmune, nervous, endocrine, reproductive.
Homeostasis definition
maintaining a biological variable; returning it to normal after a pertuberation
What is the balance of homeostasis?
equilibrium versus steady-state
What are the components of homeostatic contral mechanisms?
afferent -> integration center -> efferent -> change
Receptor types
thermo, chemo, baro
What does the integrating center do?
evaluates input from receptor and initates the approiate action of the effector
Effectors are …
responsible for body responses. include muscles and glands
What disrupts homeostasis?
External stimuli (heat, cold, lack of o2, pathogens, toxins), Internal stimuli (body temp, bp, water, salt, sugar concentrations, physical and psychological distress)
The higher the gain of the feedback loop (stronger the response), the _____ the system is held near its desired state.
closer
Steady state ____ energy
consumes
Equilibrium homeostatic state, _____ energy change involved
no
Which fluid compartment of the body exchanges fluid with the environment?
blood plasma
60-40-20 rule?
60% of the body weight is total body water, 40 is intracellular, 20% is extracellular
