BIO 202-STRAIGHTERLINE CHAPTER 19 WITH complete verified solutions
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Course
Straighterline MAT
Institution
Straighterline MAT
nervous system
A system that rapidly communicates information throughout the body; composed of the brain, spinal cord, nerves, and ganglia.
Homeostasis
The ability of the body's organisms to maintain internal stability.
lymphatic system
The organ system composed of the lymphatic ve...
BIO 202-STRAIGHTERLINE CHAPTER 19 WITH
complete verified solutions
nervous system - answer A system that rapidly
communicates information throughout the body;
composed of the brain, spinal cord, nerves, and
ganglia.
Homeostasis - answer The ability of the body's
organisms to maintain internal stability.
lymphatic system - answer The organ system
composed of the lymphatic vessels, lymph nodes,
the tonsils, the spleen, and the thymus.
Hypodermis - answer the layer of skin beneath the
dermis, which serves as a storage repository for
fat
Dermis - answer The layer of the skin below the
epidermis that contains nerve endings, sweat and
sebaceous glands, and blood and lymph vessels.
epidermis - answer The outer protective layer of
the skin that covers the dermis.
,why is homeostasis vital for the body - answer In
short, the purpose of homeostasis is to maintain
the established internal environment without
being overcome by external stimuli that exist to
disrupt the balance.
positive feedback system - answer In a positive
feedback system, your body stimulates repetitive
action to maintain its stability.
For example, if you were cut and bleeding, your
body would rapidly work to create a blood clot by
converting plasma protein into fibrin threads and
then continually build on these threads until a
suitable clot was created.
negative feedback system - answer A negative
feedback system, on the other hand, includes
bodily responses that attempt to reverse a change
to the body.
If you were injured and bleeding, instead of quickly
trying to clot the blood at the injury, this system
would attempt to reduce the amount of blood the
body was producing in order to prevent too much
of a loss. After the negative feedback system
recognizes that the clotting has worked, it realizes
its normal state.
, Matter is composed of: - answer Atom- the
smallest particle of an element that has properties
of that element
Electron-An electron is a small particle that carries
a negative electrical charge and is in constant
motion around an atomic nucleus.
Proton-A proton is a large atomic particle that
carries a positive electrical charge and is found
within an atomic nucleus.
Nuetron-A neutron is an uncharged particle with
about the same weight as a proton and is found
within an atomic nucleus.
Ion-An ion is an eletrically charged particle.
Molecule-A molecule is made up of particles
formed by the chemical union of two or more
atoms.
The three components of a cell are: - answer
Nucleus- This contains most of the cell's DNA and
is usually located near the center of the cell.
Cytoplasm-The fluid that surrounds the nucleus,
which is enclosed by the plasma membrane.
Cell Membrane- An active surface that surrounds
the other components of the cell.
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