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Defend Earth from alien invaders
The thirst center is located in the
The salivary enzyme amylase functions to digest
An abnormal form of hemoglobin
Sickle-cell anemia is caused by
the glomerular filtration rate decreases
If the arteriole that supplies blood to the glomerulus becomes constricted
If the blood vessels of the anal columns become enlarged, the condition is called
The tightly coiled tube that leads to the vas deferens is the
Secretion of hydrogen ions
The kidneys help to regulate the pH of body fluids by controlling the
The tubular portion of the uterus that extends downward into the upper part of the vagina is the
Drops and filtration decreases
As a result of excessively low arterial blood pressure, glomerular hydrostatic pressure
T-lymphocytes are presponsible for
The cells in the testes that produce male sex hormones are called
Neutorphils and monocytes
The most active phagocytic cells among the leukocytes are
All of these (T-helper, Endothial, Neuroglial cells)
The HIV viruses that causes acquired immune deficiency syndrome may infect
Increases and the blood cholesterol concentration increases
If body cells lack LDL receptors, the plasma concentration of LDL molecules
The external reproductive organs can be distinguished by the __________ week of development
Which type of blood vessel serves as a blood reservoir?
Both spermatogenesis and oogenesis
Meiosis occurs during?
Diabetes mellitus, in which fatty acids are converted to ketone bodies, leads to?
The amount of air that enters or leaves the lungs during a normal respiratory cycle is the?
Digestion of ___________ would be affected the most if the liver were severely damaged?
The American Heart Association recommends that the percentage of calories in a person's diet derived from fats should not exceed?
None of these(Urea,Uric Acid,Creatine)
Which of the following is an abnormal constituent of urine?
The tissue that forms a loose fitting sac around the heart is the?
As a platelet plug forms, platelets release the vasoconstricting substance called?
Gas exchange between the air in the alveoli and the blood in nearby capillaries occurs primarily by?
Depolarization of atrial muscle fibers
In an ECG pattern, the P wave is caused by?
Which of the following can be fertilized to produce a zygote?
Which of the following elements is included in the hemoglobin molecules?
A premature fetus has an increased chance of surviving if it produces enough surfactant to aid the functions of its?
Carbon dioxide increases
Breathing rate is most likely ot increase if the blood concentration of?
All of these
The spleen? A. Functions as a blood reservoir. B. Is responsive to low oxygen concentrations. C. Contains numerous macrophages. D. All of these
Decreased synthesis of estrogens
Women athletes sometimes experience disturbances in their menstual cycles because of?
Ingestion of excessive amounts of sodium bicarbonate to relieve the symptoms of ingestion may lead to?
proximal convoluted tubule, descending limb of loop of Henle, ascending limb of loop of Henle, distal convoluted tubule.
Which of the following indicates the parts of a renal tubule in the correct sequence from beginning to end?
Parasympathetic impulses and cause the heart rate to decrease
Inpulses carried to the heart by means of fibers that secrete acetylcholine are?
Water is needed by body temperature regulation
A person who is severly dehydrated is likely to have a high fever because?
Expiratory reserve volume
During forceful expiration, the air that can be expelled from the lungs in addition to the tidal volume is called?
The term used to describe an abnormally slow heart rate is?
Fibrinogen to fibrin
The basic event in the formation of a blood clot is the change of?
The movement of lymph through lymphatic vessels is caused largely by?
A person with two identical variants or alleles, for a gene is?
Which of the following is a protien-splitting enzyme found in pancreatic juice?
The condition called thrombocytopenia is due to a deficiency of?
Both B. and C. are true
The skeleton of the heart consists of? A. Bone within the myocardium. B. Fibrous connective tissue in the interventricular septum. C. Fibrous Connective tissue encircling the heart valves. D. Both B. and C.
Female urethral pathway is shorter
Cystitis occurs more commonly in women than in men because the?
Sacral portion of the spinal cord
The micturition reflex center is located in the?
Kidney stones are least likely to be composed of
A person in a moderate environment probably would lose the greatest amount of water by means of?
If lymphatic tissue is removed from axillary region, the arm on that side is likely to?
Filtered by blood pressure
If a substance is transported form the plasma of the pertiubular capillary in the fluid of the renal tubule, it is aid to be?
Naturally acquired active immunity
the type of resistance that develops as a result of developin a disease is
the force that causes tissue fluid to enter lymphatic capillaries is
Both T and B cells
A normal immune response requires the response of?
Diet high in unsaturated fats
Which of the following is not a factor that seems to increase the susceptibility to atherosclerosis? A. Diet high in unsaturated fats. B. High blood pressure. C. Lack of physical exercise. D. Obesity.
External jugular vein
Blood from the face and scalp is drained by the?
Drugs ingested by a pregnant woman most likely reach her fetus by passing through the
The movement of an egg cell down a uterine tube is aided by?
Agglutinogen A and B
Type AB blood contains?
Mast cells release histamine
As a result of an allergen-antibody reaction?
The hormone responsible for the development and maintenance of male secondary sex characteristics is?
Essential amino acids
Plant proteins typically contain less than adequate amounts of?
Four sperm cells with 23 chromosomes each
In spermatogenesis, meiosis results in the formation of?
All of these
the symptoms of fetal alcohol syndrome include? A. Reduced head size. B. Mental retardation. C. Abnormal facial features. D. all of these
Which of the following usually accounts for the smallest percentage of leukocytes in a blood sample?
Gallstones are usually composed of?
two arteries and one vein
How many blood vessels are usually found in the the umbilical cord?
Two thicknesses of epithelial cells and basement membranes
The respiratory membrane consists of?
Inner cell mass
The cells of a blastocyst that give rise to the body of the developing offspring constitute the?
Which of the following would produce the most life-threatening condition?
S-A node, A-V node, A-V bundle, Purkinje fibers
The correct sequence of parts that functions to carry cardiac impulses.
Deficiency of lactase
The condition called lactose intolerance is caused by?
In an autoimmune disease, the immune response is directed toward?
Right atrium to the left atrium
The foramen ovale is an opening that allows fetal blood to pass from the?
From the pharynx to the anus
Peristalsis occurs in the digestive tract?
Act against foreign substances
A primary function of lymphocytes is to?
Neutrophils and monocytes
The most active phogocytic cells found in circulation blood are?
Epithelial cells of seminiferous tubules
Testicular cancer is most likely to originate from?
Descending limb of the loop of Henle
The hormone ADH functions to promote water reabsorption through the wall of the?
Diaphragm is lowered
During the defecation reflex, the
The procedure used to directly examine the trachea and bronchial tree is called
Which of the following are volumes that cannot be measured using a simple spirometer?
Right Atrium, tricuspid valve, right ventricle, pulmonary semilunar valve.
Which of the following represents the correct sequence of parts through which blood moves in passing from the vena cava to the lungs.
High in oxygen nutrients
The fetal blood that passes through the ductus venosus is relatively
All of these
Type B hepatitis can be transmitted by means of? A. sexual activity.B. blood transfusion. C. Saliva. D. All of these
Lack of surfactant
The condition of newborns called respiratory distress syndrome is caused by
One X and one Y chromosome
Normal males have?
The receptors of the inflation reflex are most sensitive to?
Digestive action of gastric juice
Microorganisms removed form incoming air by sticky mucus are most likely to be destroyed by?
As body fluids become more alkaline, neurons become?
The fetal stage of development begins at the end of the?
Hydrostatic pressure and osmotic pressure
The movement of water and electrolytes between fluid compartments is regulated primarily by?
Estrogen is high and progesterone is low
In the female reproductive cycle, menstrual flow occurs when the concentrations of?
The type of immunoglobulin found in the secretions of exocrine glands is
Total surface area of the respiratory membrane
Emphysema is characterized by an increase in?
The amnion and chorion
The placental membrane is compose of?
Polarization of ventricular muscle fibers
In an ECG pattern, the T wave is caused by?
Passively in the proximal convoluted tubule
The largest quantity of hydrogen ions is secreted?
A newborn infant may have some defense against digestive and respiratory disturbances because of IgA obtained from its mother's?
Cytoplasmic fragments of cells
Platelets are best defined as?
All of these
Androgens are? A. Male sex hormones. B. Female sex hormones. C. Releasing hormones. D. All of these
A relatively new treatment in the management of gastric ulcers is a drug that inhibits the production of HCl in the stomach. If a person took this medication for a long period, the digestion of what would be affected the most?
Transcellular fluid includes the water and electrolytes within?
Which of the following is an agranulocyte?
Carbon dioxide to react with bicarbonate ions
the enzyme carbonic anhydrase causes?
Afferent arterioles are lateral branches of the?
Fragmenting kidney stones
Shock-wave lithotripsy is a procedure for?
Severe demands are placed on a person's ability to regulate body temperature if body water loss exceeds?
Distension of the stomach
During the act of drinking water, the desire for water is usually inhibited by?
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