A&P Exam 1
diffusion requires
a concentration gradient
Positive-feedback control systems
accelerate a change
the location at which the enzyme molecule binds to the substance it acts on is called the
active site
the definition of the parasagittal plane would be
any plane that is parallel to the midsagittal plane
the small water channels in the cell membrane are called
aquaporins
a semipermeable membrane is a must requirement for diffusion to occur
false
if the original DNA was ATCGGA, the messenger RNA formed from this DNA would be TUGCCT
false
of the two types of endoplasmic reticulum, rER is responsible for synthesizing lipids
false
red blood cells placed in a hypertonic solution may be destroyed because the blood cells will lyse
false
the three processes that comprise cellular respiration are glycolysis, the citric acid cycle, and the proton transport system
false
which is NOT an element (found in the periodic table)
glucose
the abdominal region in which the appendix is found is the
hypogastric
the abdominal region in which the urinary bladder is found is the
hypogastric
the body's thermostat is located in the
hypothalamus
which cell fiber is made of twisted strands of protein
intermediate filament
DNA
is a double helix strand of nucleotides
during which stage of mitosis do the centrioles move to the opposite poles of the cell
prophase
the correct order of the phases of mitosis is
prophase, metaphase, anaphase, telophase
withdrawing from a painful stimulus is an example of
responsiveness
an x-ray technician has been asked to take x-ray films of the liver. which of the abdominopelvic regions must be included?
right hypochondriac, epigastric, left hypochondriac
which lipid is part of vitamin D
steroids
the end product of the process of translation is a
tRNA molecule
which factor can have an effect on the functioning of an enzyme
temperature, pH, and an increase in the amount of end product produced by a reaction
shivering to try to raise you body temperature back to normal would be an example of
the body trying to maintain homeostasis and a negative-feedback mechanism
if a cell were placed in a hypertonic solution
there would be a net loss of water out of the cell
the lungs are located in the
thoracic cavity
the ventral cavity contains the
thoracic cavity and abdominopelvic cavity
DNA is found in mitochondria
true
anticodons make up part of the transfer RNA, because they are opposite of the DNA codon
true
both the citric acid cycle and the electron transport system occur in the mitochondria
true
cholesterol is a type of steroid
true
enzymes are functional proteins that bring molecules together or split them apart in chemical reactions
true
facilitated diffusion is a metabolically inexpensive process
true
for osmosis to occur, a selectively permeable membrane must be present
true
in normal mitosis, the two daughter cells are identical genetically to the parent cell
true
kidneys are bilateral organs located in the abdominal region. but they are located outside the peritoneal membrane posterior to which is called retroperitoneal.
true
metabolism includes the processes of both anabolism and catabolism
true
one function of the smooth endoplasmic reticulum is to help maintain a low Ca++ concentration in the cell's interior
true
responsiveness or irritability is the ability to sense changes in the environment and then make necessary changes of the behavior according to them. this is the basis of homeostasis.
true
the ability of proteins to perform their function depends on their shape or conformation
true
the centromere holds two chromatids together
true
the mitochondria are unique organelles because they are able to replicate themselves
true
the most important end product in cellular respiration is ATP and oxygen is one of the reactants
true
the part of the serous membrane that lines the wall of the heart is called the pericardium
true
the process of glycolysis produces two molecules of pyruvate for every on molecule of glucose
true
the size of the molecule is an important factor in both dialysis and filtration
true
two types of lipids, phospholipids, and cholesterol, are important molecules in the cell membrane
true
when vesicles from the Golgi apparatus reach the cell membrane, the contents re secreted outside the cell
true
the mediastinum is located in the __________ cavity
ventral
the partial pleura covers the
walls of the thoracic cavity
the list abundant and important compound(s) in the body is(are)
water
the formation of surcrose involves the removal of a molecule of water. this is called
dehydration synthesis
another term for posterior is
dorsal
The two major cavities of the body are the:
dorsal and ventral
which terms CANNOT bee used in describing RNA
double stranded
phagocytosis is an example of
endocytosis
ATP is broken down in an anabolic reaction
false
the basic building blocks of nucleic acid are
nucleotides
which is the correct order of the organismal complexity
organelle-->cell-->tissue-->organ
the ______pressure of a solution is the pressure that prevents the movement of water by osmosis from pure water into the solution
osmotic
if the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions?
oxytocin would inhibit uterine contractions
a structural lipid found in the cell membrane is a
phospholipid and steroid
the approximate pH of gastric fluid is
2
how many main tissue types are found in the human body
4
which organelle processes and packages material to be secreted
Golgi apparatus
interphase does not include which of the following
M phase
DNA is a major constituent of which cell organelle
Nucleus
the fundamental organizational unit of life is the
cell
in nondividing cells, DNA appears as threads that are referred to as
chromatin
all of the following occur as a result of meiosis except
chromosome number remains at 46
a sequence of three bases forms a(n)
codon
a plane through the body that divides the body into anterior and posterior portions is
coronal
after phagocytosis occurs, enzymes from which organelle can digest what is in the vesicles
lysosome
the structure in cells that is associated with the enzymatic breakdown (digestion) of foreign material is the
lysosome
the end product of the process of transcription is a
mRNA molecule
the therm most nearly opposite cortical would be
medullary