CORRECT ANSWERS (ALREADY VERIFIED)
Virtually all of the protein or amino acid-based hormones exert their effects
through intracellular __________.
a. ions
b. deactivators
c. second messengers
d. nucleotides
c. second messengers
When phagocytes leave the capillary wall, it is called
a. diapedesis
b. leukocytosis
c. chemotaxis
d. margination
a. diapedesis
After hemoglobin is broken down, what part of it enters the liver and becomes bile,
which helps us digest food?
a. globin
b. bilirubin
c. heme
d. ferritin
b. bilirubin
Chemical Substances secreted by cells into the extracellular fluids that regulate the
metabolic function of other cells in the body are called ___________.
a. proteins
b. antibodies
,c. hormones
d. enzymes
c. hormones
The master gland of the endocrine system is the_________.
a. endocrine
b. pituitary
c. adrenal
d. thyroid
b. pituitary
The secretion of hormones in response to changing blood levels of ions is known
as _____.
a. neural stimulus
b. hormonal stimulus
c. humoral stimulus
d. ionic stimulus
c. humoral stimulus
Which of the following is not a characteristic of the inflammatory response?
a. prevents the spread of the injurious agent to nearby tissue
b. replaces injured tissues with connective tissue
c. sets the stage for repair processes
d. disposes of cellular debris and pathogens
b. replaces injured tissues with connective tissue
Which of the following is not true about antibodies?
a. they have complement binding sites
b. they directly destroy pathogens
c. they neutralize pathogen’s
d. they cause agglutination
,b. they directly destroy pathogens
One reason we can hold our breath for a long time is:
a. excess carbon dioxide can be converted to bicarbonate and excreted by the
kidneys
b. hemoglobin can be saturated in .25 seconds
c. hemoglobin unloads only about 25% of its oxygen in 1 trip through the systemic
circulation
d. our body can resist changes in blood pH
c. hemoglobin unloads only about 25% of its oxygen in 1 trip through the systemic
circulation
Surfactant helps to prevent the alveoli from collapsing by
a. interfering with the cohesiveness of water molecules, thereby reducing the
surface tension of alveolar fluid
b. humidifying the air before it enters
c. warming the air before it enters
d. protecting the surface of alveoli from dehydration and other environmental
variations
a. interfering with the cohesiveness of water molecules, thereby reducing the
surface tension of alveolar fluid
Which of the following are true about natural killer cells?
a. all of these
b. they are nonspecific
c. they enhance the inflammatory response
d. they release perforins
a. all of these
What percent of carbon dioxide is carried by hemoglobin in the blood?
a. 20
, b. 10
c. 97
d. 70
a. 20
Air moves into the lungs because:
a. the gas pressure in the lungs becomes lower that the outside pressure as the
diaphragm contracts
b. the volume of the lungs decreases with inspiration
c. contraction of the diaphragm decreases the volume of the pleural cavity
d. the internal intercostal muscles decrease the thoracic cavity volume
a. the gas pressure in the lungs becomes lower that the outside pressure as the
diaphragm contracts
Which of the following is associated with passive immunity?
a. booster shot
b. infusion of weakened viruses
c. passage of antibodies from a pregnant mother to her fetus
d. long-term immune protection
c. passage of antibodies from a pregnant mother to her fetus
Which of the following would increase hemoglobin's affinity for oxygen?
a. decreased temperature
b. increased temperature
c. increased BPG concentration
d. decreased pH
a. decreased temperature
When a localized area exhibits increased capillary filtration, hyperemia, and
swelling it is an indication that:
a. antigens are present