Which is an example of a normally occurring positive-feedback mechanism?
stretching of the uterus near the end of pregnancy
Which of the following
... [Show More] is the most widely distributed type of muscle in the body?
Smooth
A doctor performing an autopsy on a patient concludes that part of the brain was likely damaged by trauma due to a large population of which type of cell?
microglia
During DNA replication, how does each template strand eventually become two identical DNA molecules?
One strand forms continuously, the other forms in short segments spliced by DNA ligase
Which is the most superficial layer of skin that is composed primarily of living cells?
stratum spinosum
Which of the following components of the bone matrix, when removed, allows the bone to be easily shattered?
Collagen
The targeted response of the hormone lipotropin is an increase in which of the following?
the breakdown of fat in adipose tissues
What is the smallest level of organization in the body that contains the body's genetic information?
cellular
Which sentence best describes the sliding filament model of muscle contraction?
Sarcomeres and myofibrils contract
Which of the following is the definition of a third degree burn?
a burn that has destroyed the dermis and epidermis
Which class of chemical messengers is secreted by neurons into synaptic clefts to activate an adjacent cell?
Neurotransmitter
Which of the following types of openings in the skeletal system does a "sinus" describe?
Cavity
Which of the following processes generates the most ATP within a human cell?
Oxidative phosphorylation
What type of axons is found in a gray ramus comunicans?
unmyelinated, post-ganglionic axons
Deep means
Away from the surface
Which of the following is consistent with homeostasis?
As body temperature rises, sweating occurs to cool the body
which of the following describes the position of the nose?
Superior to the mouth
An organelle is
A small structure within a cell
Posterior means
Toward the back of the body
Which body system would be affected by degeneration of cartilage in joints?
Skeletal
Inferior
Pointing towards the feet (down)
The study of tissues is
histology
Cephalic means
closer to the head
the term "dorsal" means
toward the back of the body
The thumb is ______ to the fifth digit (little finger).
lateral
The shoulder is _______ to the elbow
proximal
The inguinal region is commonly known as the
Groin
Nerve cells generate electrical signals in response to changes in the environment. This is an example of
responsiveness
Magnetic resonance imaging is based on the movement of
protons in a magnetic field
The pectoral region is the
chest area
An increase in the number of cells is
Growth
What system removes nitrogenous waste products from the blood and regulates blood pH, ion balance, and water balance?
urinary
The sural region is the
calf
An anatomic image created from sound waves is a
sonogram
the lumbar region is the
lower back
Which of the following systems carries necessary compounds like oxygen and nutrients throughout the body?
cardiovascular
Anatomy is
the study of structure
the visceral pleura is
the serous membrane that covers the lungs
Which of the following is most similar to the negative feedback mechanism in human physiology?
A toilet tank refills itself after a flush
The pleural cavity is the
space located between the visceral and parietal pleura
The popliteal region is the
hollow behind the knee
Organize the following structural levels of the human body from simplest to most complex.
(1) Cell
(2) tissue
(3) chemical
(4) organ system
(5) organ
3,1,2,5,4
The cavity of the body immediately inferior to the diaphragm is the ____________ cavity
abdominal
The change in shape of tissues or organs is called
morphogensis
Homeostasis is defined as
the maintenance of a relatively constant environment within the body
An organism's ability to use energy in order to swim is an example of
metabolism
A researcher discovered a sensory receptor that detects decreasing oxygen concentrations in the blood. According to the principles of negative feedback, it is likely that stimulation of this sensory receptor will produce which of the following types of responses?
an increase in the respiratory rate
Which of the following activities would represent a physiological study?
determining normal blood sugar levels for 20-year-old students
Toward the midline of the body is
median
Electrolytes are substances that
conduct electricity when dissolved in water
A group of water molecules are held together by
hydrogen bonds
Which of the following factors will influence the rate of chemical reactions?
All of these factors will influence the rate of chemical reactions
a. temp
b. concentration of reactants
c. presence of catalysts
d. presence of enzymes
Which of the following organic groups does hemoglobin belong to?
protein
a base is a proton
acceptor
An organic molecule such as a vitamin that makes an enzyme functional is called a/an
coenzyme
What type of covalent bond is formed between amino acid molecules during protein synthesis?
peptide bond
Which of the following is determined by a sequence of amino acids bound by peptide bonds?
primary structure of protein
Which of the following is NOT a function of carbohydrates in the body?
protection
The pH value
is determined by the concentration of hydrogen ions
A neutral atom will become a cation if it
loses electrons
An atom has an atomic number of 19 and a mass number of 39. This atom will have
20 Neutrons
Carbon dioxide is considered a(n)
molecule and a compund
Which of the following chemical reactions best represents the decomposition of ATP?
ATP+H2O->P1+energy
Nucleotides
are the building blocks of nucleic acids
Lipids
are an important component of cell membranes
In ionic bonding
electrons are transferred from one atom to another
Which of the following statements is false?
Water evaporation heats the body
Normal pH range for blood is 7.35 to 7.45. If blood pH falls below 7.35
an imbalance called acidosis results
Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "B" relative to the RBC? (it's squished and deformed)
hypertonic solution
The plasma membrane
regulates movement of materials into and out of the cell
Which of the following terms does NOT relate to the mitochondria
vitamin A storage
Cytokinesis is completed at the end of this phase
telophase [Show Less]