211 Test One Flashcards
Homeostasis
Maintaining balance despite widely changing external conditions.
Intrinsic regulation
Autoregulation, happens at tissue and organ level.
Extrinsic regulation
Neural and hormonal. External
Homeostatic feedback loop step one.
Stimulus: physical or chemical parameter that can very. Stimuli can be internal or external.
Homeostatic feedback loop step two.
Sensor: the structure that detects the change. Sensor can be cells, tissues organ that has sensors for the stimulus.
Homeostatic feedback loop step three.
Control center: the structure that processes the information. Then sends a message. Message is either neural or endocrine(chemical).
Homeostatic feedback loop step four.
Message: intercellular communication. Will be neural, chemical or hormonal.
Homeostatic feedback loop step five.
Effector: cell, tissue, organ or structure that receives the message. The effector will either receive a neural signal or have receptor for the hormone or chemical (ligand).
Homeostatic feedback loop step six.
Response: change of the effector. The presence of the message will change the activity of the receptor and then will counteract the change.
Biochemistry
Macromolecules
Pro tines, lipids, carbohydrates and nucleic acids
Condensation/dehydration reactions.
Enzymes
Chemical reaction catalyst, does not get used up in the reaction. Attaches to a substrate.
Properties of water.
H bonding, …
Membrane structure and function
Very important!!!!!!!!
Passive transport:Diffusion and Facilitated diffusion
Active transport.
Histology, four tissue types.
Epithelial
Connective
Muscle
Nervous
Autonomic nervous system
Very important!
