VOCAB
What is the controller?
Detects changes in the environment such as changes in temperature, PH, and glucose levels in blood.
What is an example of positive feedback?
oxytocin being released during child birth.
What does the sensor do?
Detects change in temperature, pH, glucose
What are the different transport processes?
Passive transport and active transport.
What do plants cells have that animal cells does not have?
Cell wall, plastids, and a large central vacuole
What are reflex arcs?
Neural pathways allowing automatic responses to changes in the environment.
What is an example of negative feedback?
What is homeostasis?
The body's ability to keep its internal environment stable despite external changes.
What does active and passive transport do?
active transport- it is the movement of ions or molecules across the cell membrane from an area of low concentration to an area of high concentration against the concentration gradient that requires energy input from the cell
Passive transport- the movement of molecules and ions move across the membrane does not require energy from the cell.
What do animal cells have that plant cells do not?
Cell membrane.
What is diffusion?
the movement of ions and molecule, without an assistance by transport proteins, from an area of high concentration to an area of low concentration until it reaches an equilibrium.
What is the difference between positive feedback and negative feedback?
Positive feedback:Happens when a change in a variable triggers a response that intensifies that original change and moves the variable from its normal range
Negative feedback:When a change in a variable triggers a response that counteracts the original change and brings variable back to the normal range
What variables does the body use to maintain homeostasis?
Water temperature, blood pH, blood glucose, fluid balance, ion concentrations.
What helps maintain the membranes fluidity and reduces the temperature effects on the membrane?
Cholesterol.
What does the lecoplast in plant cells do?
They store starch, fat, and proteins.
What is exocytosis?
a process in which cells release large molecules from within the cell to its outside environment.
What is set point?
Ideal value for the variable.
What are the ion concentrations?
Sodium, potassium, calcium.
What is the difference between hypertonic and hypotonic and isotonic?
Hypertonic solution has more solute than the cell -> net water flow out of the cell. Isotonic solution has equal
solute -> water in = water out. Hypotonic solution has less solute than the cell -> net water flow into the cell.
What the chromoplast do?
Contains pigments and colors(specifically green)
What is endocytosis
The process in which cells take in molecules, particles, or microorganisms from the external environment by forming a vesicle or vacuole around them is called
What does the error detector do?
Compares actual value to set point and detects deviation.
What does the effector do?
It carries out the response by releasing hormones or contracting muscles.
What does cholesterol do?
Helps maintain membrane fluidity and reduces temperature effects on the membrane.
What do centrioles do?
They help from spindle fibers that separate chromosomes during cell division.