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