Cell Transportation
Which direction does molecules move in diffusion?
high to low
A _________ is made up of multiple cells.
Tissue
What is homeostasis?
Keeping the body in balance.
A type of feedback loop that uses an opposite response to a stimulus.
Negative Feedback
What level of ecology describes all of the individuals of the same species in an area?
Population
What is the main difference between passive and active transport
active uses energy (ATP) and passive does not
Put these in order from smallest to largest:
Molecule, Organ System, Organism, Organelle, Cell, Tissue, Organ
Molecule, Organelle, Cell, Tissue, Organ, Organ System, Organism
A researcher discovered a new hormone in the human body that decreases blood potassium levels. According to the principles of negative feedback, this hormone would be secreted when __________.
Potassium levels are high.
What type of feedback is this:
Baroreceptors notify the brain that the blood pressure has increased. The brain then notifies the blood vessels to dilate, thus lowering the blood pressure.
Negative Feedback
An ________ _________ invades an area and has no natural predator, allowing its population size to flourish.
Invasive Species
what is osmosis
movement of water
An individual made up of multiple organ systems is called a __________.
Organism
What does your body do when your temperature is too high?
Sweats
What type of feedback loop is this:
A neuron is stimulated, thus opening membrane channels to allow sodium ions to leak from the extracellular fluid to the intracellular fluid. This causes more membrane channels to open, thus allowing more sodium ions to enter the intracellular fluid.
Positive Feedback
Which macromolecule is commonly found in bread, rice, and fruit?
Carbohydrate
endocytosis moves substance ______ the cell
into
Chloroplast
Is this example positive or negative feedback?
During delivery, the birth canal is stretched, which stimulates the pituitary gland to secrete oxytocin, which stimulates uterine contraction.
Positive Feedback
A type of feedback loop that continues to amplify a response, pushing it further away from homeostasis.
Positive Feedback Loop
What are the products of photosynthesis? There are two.
Glucose and Oxygen gas.
which type of transportation moves molecules against the concentration gradient
active transport
The two body systems required to carry oxygen around the body are called the _________ system and _________ system.
Circulatory and Respiratory
What chemical does your body use to lower your blood sugar if it is too high?
Insulin
What type of feedback loop is this:
Elevated body temperature is sensed by cells in the brain. As a result, sweat is produced, and heat is lost as the water in the sweat evaporates.
Negative Feedback Loop
What is the term used to describe a species that is at the top of its food chain, and has no predators?
Apex Predator