Homeostasis
The ability of an organism to maintain internal stability.
Homeostasis
Negative feedback occurs when a stimulus causes a response and an effect that in turn _____________________ the stimulus in order to maintain homeostasis.
reduces / counteracts
Positive feedback occurs when a stimulus causes a response and an effect that ___________________ the stimulus.
increases / amplifies
The alveoli in the lungs have a high concentration of oxygen molecules while the blood vessels in the low concentration of oxygen molecules. Oxygen moves into the blood through ____________
diffusion
___________________ is the process by which producers such as plants make their own food. They take in carbon dioxide, water and sunlight into their chloroplast and make oxygen and glucose.
Photosynthesis
Organisms that cannot maintain homeostasis ___________________________________
get sick and can die
Thermoregulation is a negative feedback loop because the effect of ____________________ causes a reduction in the stimulus of high body temperature.
sweating / vasodiation
One example of positive feedback
childbirth / blood clothing
The ________________ system senses environmental stimuli and translates those stimuli to the body.
nervous
The light energy from the sun is converted to ___________ energy in glucose.
chemical
The process by which humans control and balance their salt and water levels. This is mostly done by the kidneys.
Osmoregulation
Glucose Regulation is a negative feedback loop because the stimulus of high glucose results in a response of insulin release which causes _______________________
the lowering of blood glucose levels
Childbirth is a positive feedback loop.What is the stimulus of childbirth?
head of the body touching the cervix and causing the first contraction
The function of the ________________ system is to transport molecules throughout the body. It can transport nutrients or help remove waste.
Circulatory
In both photosynthesis and cellular respiration there is a conservation of _________ and __________
matter and energy
The ____________ and ____________ also help the plant maintain homeostasis and do photosynthesis.
guard cells and stomata
Glucagon
what is the response in child birth?
the hormone oxytocin is released
The kidney also produces the hormone erythropoietin (EPO) that stimulates the increased production of red blood cells. Why are red blood cells important?
they carry oxygen needed for cellular respiration
What are the outputs of cellular respiration?
during hot sunny days the guard cells close the stomata to ensure _____________ is not escaping from the plant which would cause the plant to dry out
water vapor
Glucose is stored in the _____________ as ____________
liver as glycogen
Blood clotting is a positive feedback loop. When tissue is wounded (ex: skin is cut) chemicals are released by the wound. The chemicals then signal the activation of _____________.
Platelets
The _______________ system has the pancreas which then releases the hormones insulin and glucagon to help with the transportation of glucose
Endocrine
Anaerobic respiration in muscle cells produce ____________ and ____________
ATP and lactic acid