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10 Cards in this Set

  • Front
  • Back
duct
Exocrine glands secrete substances into a __________ leading to the external environment.
secretion
In the process known as __________, materials are transported from the blood to the lumen of an organ such as the stomach or kidney tubule.
water
The most abundant substance in the body is __________.
Semipermeable or selectively permeable
Tissues and cell membranes that allow some molecules to pass through, but not others, are called __________.
hypothesis
According to the scientific method, Otto Loewi's idea that a substance released from the vagus nerve slows the heart rate (which he subsequently tested in an experiment) would be called a __________.
homeostasis
The maintenance of a constant internal environment despite changes in the external environment is termed __________.
set point
In terms of homeostasis, a body temperature of 98.6 degrees Fahrenheit for humans would be considered a __________ (2 words).
effectors
In a negative feedback loop, gland and muscles are __________.
LH surge
A positive feedback loop involving the pituitary gland and the ovaries is called the __________ (2 words).
High
Intracellular fluid has a __________ concentration of potassium.