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PHSL 1010 Exam 1 Questions And Accurate Answers A+ Graded
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PHSL 1010 Exam 1 Questions And AccurateAnswers A+ Graded
What is the general purpose of feedback mechanisms - ANSWER the bring about rapid
change in the body
What is a hormone - ANSWER a chemical regulator secreted from an endocrine gland
that travels through the bloodstream to affect target cells
What is the best description of how the total body balance of any chemical substance is
determined? ANSWER The difference between the amount of substance lost from the
body and the amount gained
Which directly determines an atom's identity? ANSWER the number of protons
Which of the major ions found in the body carries a negative charge? ANSWER Chloride
What is true of electrolytes - ANSWER they conduct electricity when dissolved in water
Molecules that have properties of both polar and non polar molecules are called -
ANSWER amphipathic
The pH of a solution - ANSWER Is a measure of the concentration of free H ions in the
solution
which chemical group does glucose best fit into - ANSWER monosaccharides
Four basic types of cells - ANSWER muscle, nerve, connective tissue, epithelial
,What are the four general categories of cells that comprise the human body - ANSWER
epithelial, connective tissue, neuron, muscle
Physiology is the study of - ANSWER How organisms function
The study of disease states in the body is called - ANSWER Pathophysiology
Bone cells, blood cells, fat cells, and cartilage cells are types of - ANSWER connective
tissue cells
Connective tissue does what - ANSWER connects, anchors, supports
connective tissue is found - ANSWER in loose meshwork of cells and fibers
Loose connective tissue is found - ANSWER in loose meshwork of cells and fibers
underlying epithelium
Dense connective tissue is - ANSWER tough, rigid tissue (tendons and ligaments)
What is the principal function performed by epithelial cells - ANSWER forming
boundaries between body compartments
Functions of epithelia - ANSWER form boundaries with body compartments, function as
selective barriers-regulate molecule exchange; specialized cells for the selective
secretion and absorption of ions and organic molecules; protection
The cell type that is specialized to communicate with other cells and control their
activities is - ANSWER nerve cells
, Nervous system cell that initiates, integrates, and conducts electrical signals to other
cells - sometimes over a long distance - ANSWER neuron
Cellular extensions of neurons packaged with connective tissue carries signals between
the nervous system and other parts of the body ANSWER nerve
What term means the specialized cell types arise from development ANSWER
differentiation
What is the best description of the extracellular matrix ANSWER it surrounds cells;
contains proteins, polysaccharides, and minerals. Provides a scaffold for cell
attachment. transmits messengers to cells
extracellular matrix is composed of - ANSWER combination of proteins,
polysaccharides, and minerals
Collagen fibers - ANSWER ropelike fibers
elastin fibers - ANSWER rubberband like fibers
type of fiber that can be compared to concrete packing material - ANSWER nonfibrous
protein containing a carbohydrate
Functions of extracellular matrix - ANSWER provide scaffold for cellular attachments.
chemical messengers transmit info to cells for growth. differentiation, activity, and
migration
If a person begins to sweat upon entering a hot room but continued sweating is able to
keep body temperature constant, which best describes her condition - ANSWER She is
in a steady state
Homeostasis: dynamic equilibrium - ANSWER Maintenance of stable internal
environment. Variables are kept in normal range around set point.
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