How organized are you?
Basic unit of life
cell
Breaks down and absorbs nutrients, salts, and water; eliminates some wastes
digestive system
the maintenance of an internal environment within set ranges
homeostasis
beats per minute
Which system involves both electrical and chemical signals?
nervous
Different types of tissues that function together
organ
brings in oxygen for cells; expels carbon dioxide and water vapor
respiratory system (must be spelled correctly!)
receive info from sensors, compare it to set values, and send messages
control center
measures blood pressure
What are the chemical messengers of the endocrine system called?
hormones
the single cell formed by the union of egg and sperm
zygote
regulates body's responses to changes in internal and external environment; processes information
nervous system
gather information about internal and external conditions and relay info
sensors
What is the average blood pressure for a healthy person?
120/80
What are the chemical messengers of the nervous system called?
neurotransmitters
Committed cells acquire specialized structure and function
differentiation
influences growth, development, metabolism; helps maintain homeostasis
endocrine system
feedback that counteracts a change
negative feedback loop
What is the first number of blood pressure called?
Systolic
What is the electrical impulse caused by sodium ions moving into the neuron called?
action potential
determination
Skin, hair, nails, sweat, and oil glands
integumentary system
An example of positive feedback
MORE of something - hormones to produce contractions in childbirth; clotting mechanisms when cut
What is the name of the artery measured in your wrist for pulse?
radial
What happens to the number of receptors on a dendrite during desensitization?
Amount of receptors decreases