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26 Cards in this Set
- Front
- Back
the internal environment remains distinct from the external, t/f
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true
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How is the cellular level seperated?
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plasma membrane
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Organismal?
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skin
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how do cells reproduce?
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an original cell divides and produces two identical daughter cells
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What are the 5 survival needs?
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Nutrients – chemical substances used for energy and cell building
Oxygen – needed for metabolic reactions Water – provides the necessary environment for chemical reactions Maintaining normal body temperature – necessary for chemical reactions to occur at life-sustaining rates Atmospheric pressure – required for proper breathing and gas exchange in the lungs |
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The three interdependent components of control mechanisms are:
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Receptor – monitors the environments and responds to changes (stimuli)
Control center – determines the set point at which the variable is maintained Effector – provides the means to respond to the stimulus |
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In negative feedback systems, the output shuts off the original stimulus, give an example.
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Example: Regulation of blood glucose levels
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In positive feedback systems, the output enhances or exaggerates the original stimulus, example.
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Example: Regulation of blood clotting
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Overwhelming of ________ feedback mechanisms allowing ________ positive feedback mechanisms to take over
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negative
destructive |
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Medial, lateral, and intermediate – toward the ___________________________
___________________________. |
midline, away from the midline, and between a more medial and lateral structure
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Proximal and distal –
Superficial and deep – |
closer to and farther from the origin of the body
toward and away from the body surface |
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Ions are charged atoms resulting from the gain or loss of ________
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electrons
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Electrons shared equally between atoms produce nonpolar molecules, give an example.
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Water
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Building blocks of protein...
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containing an amino group and a carboxyl group
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Primary structure –
Secondary structure – Tertiary structure – Quaternary structure – |
1.chain of amino acids in single-file line
2.how amino acids interact with one another and begin to fold 3.three dimensional folding of amino acids to make a large protein 4.multiple proteins functioning together as a single unit |
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what is a Source of immediately usable energy for the cell
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ATP
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Bilayer membrane consists of
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phospholipids, cholesterol, and glycolipids
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What type of transport Uses ATP to move solutes across a membrane
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Active transport
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Secondary active transport –
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use of an exchange pump (such as the Na+-K+ pump) indirectly to drive the transport of other solutes
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In skeletal and cardiac muscle – storage and release of calcium is regulated by what?
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smooth er
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What functions in modification, concentration, and packaging of proteins
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Golgi apparatus
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Lysosomes not only detoxify a cell they....
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Breakdown bone to release Ca2+
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Body temperature regulation is accomplished by
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Dilation (cooling) and constriction (warming) of dermal vessels
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Hydroxyapatites, or mineral salts are responsible for what 3 characteristics?
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Sixty-five percent of bone by mass
Mainly calcium phosphates Responsible for bone hardness and its resistance to compression |
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Articulation is
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– site where two or more bones meet
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Articulating bones are united by what?
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cartilage
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