CH lower case 4 means
there is one carbon and four hydrogen atoms
A good example of positive feedback would be
enhancement of labor contractions
the innermost electron shell in an atom holds up to ______atoms
Atom X has seventeen protons. How many electrons in its valence shell?
Which of the following describes cells?
They are the structural building blocks of all plants and animals
Which of the following would be correctly classified as a protein?
Enzymes, liposaccharide, starch, cholesterol, cellulose
special catalytic molecules called ___ control chemical reactions in the body
______means toward or at the back of the body, behind
Cell membranes are _____ _____ because they allow some substances to pass but not others.
______ is a broad term that covers all chemical reactions within the body cells.
AB------>A+B is an example of _______ reaction
Which of the following would be an example of an organic molecule?
CH4 (lower 4) carbon hydrogen four
A solution that has a pH of 2 could best be described as being
Some cells contain large numbers of mitochondria while others have relatively few or none. This suggests that
cells with large numbers of mitochondria have a high energy demand
The movement of oxygen from an area of high concentration to an area of low concentration is an example of
This type of feedback exaggerates the effects of variations from normal
If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what will happen
the cells will lose water and shrink
the chin is __ to the nose
which of the following statements is correct regarding the electrical charge of subatomic particles
protons are positively charged, electrons are negatively charged, and neutrons are neutral
when electrons are transferred from one atom to another the two atoms unite as a result of the opposite charges
an ionic bond is formed
a process that requires cellular energy to move a substance against its concentration gradient is called
An anatomical term that is the same as ventral
the anatomical position is used
as a standard reference point for directional terms regardless of the actual position of the body
The process of discharging particles from inside a cell to outside is called
the phrase____ _____ describes the plasma membrane consisting of phospholipids, proteins, and cholesterol that drift in a bilayer.
fluid mosaic model
____ are molecules with two fatty acid chains and a phosphate group that form biological membranes.
synthesis of lipids and glycogen takes place in the
Isotopes of an element differ in the number of
neutrons in the nucleus
The plasma membrane is
The phospholipid bilayer surrounding the cell
The organic compounds that function in building tissues and acting as enzymes are the
The intake of small membrane vesicles from the extracellular fluid is called
Groups of cells that have a common funtion are called
the simplest atom-containing one proton, one electron, and no neurons is
the molecuel made by mitochondria that provides the power to the cell is
fatty acids are
which of the following is both an anion and a compound
HCO-3 (lower case 3)
What is the major function of ribosomes
which of the following elements of a control system detects a change?
The main, general purpose of negative feedback is
to maintain homeostasis
are both hydrophilic and hydrophobic in nature
the skin swells and puckers during a long bath this suggests that the bath water is a
the chemical notation, the symbol Ca+2(lower case two) means
a calcium ion that has lost two electrons
the anatomical position is characterized by all of the following except
palms turned posteriorly
a red blood cell placed in pure water would
swell and burst
Which of the following statements about RNA is true
RNA is single stranded
Which of the following consists of a network of intracellular membranes with attached ribosomes?
rough endoplasmic reticulum
All of the following are true concerning enzymes except that they
are consumed during the reaction
Starch is an example of a
Which of the following is a concept of the cell theory?
Cells are the basic structural unit of life
The movement of water across a membrane from an area of higher water concentration to an area of lower water concentration is known as
A solution that contains a higher solute concentration than the cytoplasm of a cell is called
A control mechanism that responds to a stimulus by decreasing its intensity is called a ________ _________
The random movement of molecules (and ions) down their concentration gradient is called
The body's ability to maintain stable internal conditions is referred as
The correct sequence from simplest to most complex
atoms, molecules, cells, tissues, organ
molecules that store and process genetic information are the
the four elements that make up about 96% of body matter are
(cohn) carbon, oxygen, hydrogen, nitrogen
A person is lying on the bed gazing at the ceiling. She is in the _____ position
Many names for sugars end in the suffix
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