Biology Midterm

celsius – the basic unit for measuring temperature in the metric system.
Prokaryote – Unicellular organism that lacks a nucleus
reaction-center complex – complex of proteins associated with a special pair of chlorophyll a molecules and a primary electron acceptor, triggers light reactions of photosynthesis by donating an electron to an ETC
Guanine – Nitrogenus Base found in DNA and RNA that pairs with Cytosine
stamen – A pollen-producing male reproductive part of a flower, consisting of a filament and an anther.
7.4.5 Peptide bonds between amino acids –
Epidermis – An outer layer of cells designed to provide protection
activation energy – the amount of energy needed to start the reaction
catalyst – a chemical agent that increases the rate of a reaction without being consumed by the reaction
When listening to the heart, the first heart sound correlates to:
vitreous humor – A jellylike substance filling the space behind the lens in the vertebrate eye; helps maintain the shape of the eye.
phytoplankton – Tiny floating photosynthetic organisms, primarily algae
"With the concentration gradient" – Natural movement of a molecule from its higher concentration to its lower concentration
(T/F) Bias is man's tendency to interpret the results of an experiment. – true.
6.5.8 State that homeostasis involves maintaining the internal environment between limits, including blood pH, carbon dioxide concentration, blood glucose concentration, body temperature and water balance – Homeostasis is the tendency of an organism or cell to maintain a constant internal environment within tolerance limits
Internal equilibrium is maintained by adjusting physiological processes, including:
◾Body temperature (normally 36 – 38°C)
◾Blood pH (normally 7.35 – 7.45)
◾Carbon dioxide concentration (normally 35 – 45 mmHg)
◾Blood glucose concentration (normally 75 – 95 mg / dL)
◾Water balance (varies with individual body size)
axial skeleton – The section of a skeleton made up of the vertebral column, skull, and ribs.
Hypotonic – a less concentrated solution; the solution contains less solute and more water
When listening tо the heаrt, the first heаrt sоund cоrrelаtes to:
urinary system – The organ system that forms and excretes urine while regulating the amount of water and ions in the body fluids.
anaphase – stage of mitosis when the chromatids of each chromosome have separated and the daughter chromosomes are moving to the poles of the cell
decomposer – organism which breaks down dead and decaying matter and recycles nutrients
eukaryotic cells (Eukaryotes) – Cells that contain a nucleus and membrane-bound organelles.

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