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Terms in this set (19)
During exercise, the adrenal medulla and sympathetic nerves cause which of the following to occur?
a) Precapillary sphincters to constrict in response to muscle metabolites such as lactic acid, CO2, and adenosine
b) arterioles to dilate in response to epinephrine and norepinephrine
c) muscular contraction to compresses the blood vessels d) parasympathetic nerves to be activated.
arterioles to dilate in response to epinephrine and norepinephrine
What is the main chemical stimulus for cerebral autoregulation?
b) Sodium levels
c) CO2 levels
d) O2 levels
e) Chloride levels
What does decompensated shock result in?
a) Ischemia and acidosis of the brainstem
b) Several life-threatening positive feedback loops
c) Myocardial ischemia and infarction and ischemia and acidosis of the brainstem
d) Disseminated intravascular coagulation and several life-threatening positive feedback loops
e) Ischemia and acidosis of the brainstem, myocardial ischemia, several life-threatening positive feedback loops, and disseminated intravascular coagulation
Ischemia and acidosis of the brainstem, myocardial ischemia, several life-threatening positive feedback loops, and disseminated intravascular coagulation
Which of the following is NOT a mechanism that assists venous return?
a) Pressure generated by the heart
c) The skeletal muscle pump
d) Central venous pressure being greater than pressure in the venules
e) Cardiac suction
Central venous pressure being greater than pressure in the venules
Natural Killer cells
may defend against a kidney transplant
recieve antigens presented to them by APC's
alert the body if bacteria get through the skin
may ingest and destroy bacteria
give rise to cells that secrete antibodies
T cells achieve immunocompetence in _________.
c) bone marrow
T/F: The lymphatic system is involved in circulation, immunity, and nutrient absorption
Which of the following forces does not help lymph to flow?
a) arterial pulsations squeezing lymphatic vessels
b) The thoracic pump
c) Rhythmic contractions of lymphatic vessels
d) The lymphatic node pump
e) The skeletal muscle pump
The lymphatic node pump
T/F: Lymph originates in blood capillaries that pick up tissue fluid.
Removal of the __________ would be more harmful to a one-year-old child than an adult.
b) lymph node
e) palatine tonsil
T/F: Blood flow through a capillary bed is regulated by precapillary sphincters.
T/F: Decompensated shock is normally corrected by the body's homeostatic mechanisms,
T/F: Blood flow is pulsatile in arteries and veins, but is steady in capillarie
T/F: The radial artery is lateral to the ulnar artery
T/F: Vasomotion can raise or lower blood pressure throughout the body.
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