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Science
Biology
Human Biology
7th Science - Ch. 7 "human Body Systems"
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Terms in this set (20)
Calorie
unit of measurement of the amount of energy in food
detect
to discover the presence of
homeostasis
steady internal conditions when external conditions change
immunity
protection from infection or toxins
lymphocyte
type of white blood cell that is made in the thymus, the spleen, and bone marrow
nutrient
part of food that is used by the body to grow and survive
organ system
group of organs that work together and perform a
specific task
protein
long chain of amino acid molecules
vessel
tube in the body that carries fluid such as blood
compact bone
hard outer layer of bone
hormone
chemical signal that is released by the organs of the endocrine system
neuron
basic unit of the nervous system; nerve cell
reflex
Automatic movement in response to a signal
spongy bone
interior region of bone that contains many tiny holes
fertilization
joining of an egg and sperm
gamete
Human reproductive cells
ovum
female gamete
reproduction
the process by which new organisms are produced
sperm
male gamete
zygote
cell that forms when an egg and a sperm join together
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Verified questions
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Conduction of nerve signals and contraction of muscles depends on the proper balance of: a. glucose. b. electrolytes. c. buffers. d. nitrogen.
engineering
A 4-mF capacitor has the terminal voltage $$ v=\left\{\begin{array}{ll}{50 \mathrm{V},} & {t \leq 0} \\ {A e^{-100 t}+B e^{-600 t} \mathrm{V},} & {t \geq 0}\end{array}\right. $$ If the capacitor has an initial current of 2 A, find: (a) the constants A and B, (b) the energy stored in the capacitor at t = 0, (c) the capacitor current for t > 0.
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How do controls on the cell cycle protect multicellular organisms from accumulating large numbers of damaged or defective cells?
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A person receives a stab wound to the left side of his neck. Miraculously, blood vessels are spared. However, following this trauma, his left pupil remains more constricted than his right pupil, and he drools out of the left side of his mouth. How can you explain these symptoms.
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