nln specfic Flashcards
1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower
specific heat
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large number of swimming paramecium. Under this condition, which of these behaviors of the paramecia will be observed
They will eventually all swim away from the ammonium hydroxide
A person blows his breath into a straw that is placed in limewater. The limewater becomes cloudy because the person’s breath contains
carbon dioxide
normal adult BP =
120/80 mm Hg
unknown gas is more dense than air, does not support combustion, and turns a limewater solution cloudy. This gas is most probably
carbon dioxide
If a red light is passed through a dilute solution of chlorophyll solution, the spectrophotometer will detect what amount of transmittance of this light?
50-75%
If the medulla of the brain in a human was damaged, which of these conditions would most likely result?
Difficulty in breathing
To sterilize a metal probe in the office, a dentist could use a steam sterilizer. If unavailable, the next most effective method to sterilize the instrument would be
boiling it in water for 15 minutes
Iodized salt is used to prevent a human condition known as
iodine deff.. goiter
The organ that filters metabolic waste from the blood is
kidney
Which of these equations best illustrates a synthesis reaction? 2Na + Cl2 -> 2NaCl NaOH + HCl -> NaCl + H2O 2H2O2 -> 2H2O + O2 CH4 + 2O2 -> CO2 + 2H2O
2Na + Cl2 -> 2NaCl
Which of these quantities is most closely associated with an object’s inertia?
mass
Which part of the human central nervous system controls voluntary movements
cerebrum
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her hand. What is the first action this student should take?
Flush her hand with large quantities of water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is used up. This creates a concentration gradient across the cell membrane, drawing O2 across the membrane from the outside in, a process known as
diffusion
A lens that focuses distant light to a single point is known as a
converging lens
A material that settles out of a reaction is termed a(n)
emulsion
Cicero and Wozniak probably decided to restrict their study to male offspring of alcoholic male rats because they wanted to
compare results with prior findings from human studies
During exercise, a person’s respiratory rate increases due to
an increase in CO2 concentration in the blood
If a person is fasting for 24 hours and ingests no carbohydrates, the liver will provide for the body’s need by
converting glycogen into glucose.
The meiotic division of cells leads to the production of cells that
contain half the usual number of chromosomes.
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of
protozoan
Which of these arrangements of atoms is found in all alcohols
C-OH
Which of these changes occurs in the kidneys when a person becomes dehydrated?
The filtration rate of water remains constant and the reabsorption of water increases
Which of these factors is a variable in Cicero and Wozniak’s research?
Liquid diet of 6% alcohol
Which of these findings suggests a serious illness from a urinalysis?
Presence of glucose and protein.
Which of these processes is illustrated by the spreading out of ammonia vapor in a closed room?
diffusion
Which of these structures of the male reproductive system carries sperm cells from the testes to the lower part of the abdomen?
vas deferens
Which of these units is associated with magnitude, but not direction?
time
In ecological succession, the first living thing to colonize a hitherto barren area is called a
pioneer organism
Heat energy is absorbed in which of these phase changes?
Br2 (l) -> Br2(g)
The atoms of an element with seven valence electrons are most probably classified as
nonmetal
The bending of a wave around an obstacle is known as
diffraction
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major difference is that
cell plates are synthesized.
Which of these substances contains a nonpolar covalent bond?
O2
A recently discovered species has these characteristics: amniotic eggs, a four-chambered heart, and lightweight, honeycombed bones. Which of these ADDITIONAL characteristics is likely to be present?
feathers for flying
An example of the most complex level of organization in a frog is the
respiratory system
Anaerobic respiration occurs in muscle tissue when it cannot get sufficient oxygen to function aerobically. Which of these conditions is most likely to directly result from this?
cramps
Compounds with the same type and number of atoms and the same chemical bonds but different spatial arrangements of these bonds and atoms are called
structural isomers
Ductless glands in the human body secrete
hormones
If the night temperature drops 50 degrees, the roadrunner’s internal energy-conservation permits a lowering of body temperature to
94 f
The atomic number of flourine is 9. How many electrons are contained in the second principal energy level of a flourine atom in the ground state?
7
The physics principle that is primarily used in developing a rollercoaster ride is
centripetal force
The vertical columns on the periodic chart are known as
groups
The weight of an adult human in newtons (N) is closest to
500N
Which of these structures contains valves to prevent blood from flowing in the wrong direction?
veins
The inherited factors that are transmitted in an organism from generation to generation are called its
genotype
Which of these pairs of units measures the same quantity?
calorie and joule
Which of these quantities is a vector quantity?
energy
According to the Ideal Gas Equation (PV = nRT), if the temperature and amount of gas are kept constant, what will be the effect of an increase in pressure on the volume of a gas?
As the pressure increases, the volume decreases
As part of the human immune response, which of these cells are responsible for producing antibodies?
lympocytes
The region of the brain most concerned with coordinating somatic motor function is the
cerebellum
The second law of thermodynamics states that with every spontaneous process, the entropy of the universe
increases
Which human body system does meiosis occur in?
reproductive
Which of these hydrocarbons is a member of the benzene family?
toluene
Which of these single instruments may be used to measure the current flowing through a circuit?
ammeter
Which of these temperatures is known as Absolute Zero?
0 K
A quantity that has both magnitude and direction is called a(n)
vector
In corn plants, the gene that codes for the presence of chlorophyll is sometimes missing. The resulting seedlings are albino and will not survive. This lethal gene appears in corn populations because
the parent plants that produced the seeds carried the recessive gene for the albino trait.
The watt is a unit of
volt is
power
potential
The full set of genes in an individual is known as
human genome
Which of these germ layers gives rise to the skin?
ectoderm
Which of these processes occurs at a neuromuscular junction?
impluse transmission
Which of these structures produces sperm cells in human males?
testes
A lab technician has the choice of four different enzymes to use in an experiment that will run at 25°C. The optimal temperatures of enzymes using the Kelvin scale are: Enzyme A: 273 K, Enzyme B: 298 K, Enzyme C: 310 K, Enzyme D: 325 K. Which enzyme would be the best to use in this experiment?
enzyme B`
A substance composed of similar atoms (number of protons is the same for all) that can not be broken down chemically is a(n)
element
All the glucose filtered from the blood in the glomerulus into the Bowman’s capsule of the kidney nephron is returned to the tissue fluid while passing along the proximal tubule. This rapid return is effected by the process of
active transport
If blue light emits electrons from a photosensitive surface, then electrons must also be emitted by
ultraviolet
In the reaction of iron with water shown below, what coefficient must be placed before the iron (Fe) to balance the reaction? Fe + 4H2O ° Fe3O4 + 4H2
3
Muscles are attached to bone by which of these structures?
tendon
When blood is filtered in the kidney and urine is produced, red blood cells and plasma proteins do not pass through the blood capillaries. This occurs because
large molecules such as blood and plasma proteins do not fit through the permeable membrane, so they cannot enter the tubules in the kidney.
Which of these arrangements of atoms is found in all alcohols?
C-OH
