Which of the following is TRUE of positive feedback?
a. The change sensed by the sensor is amplified.
b. The effector turns off the response.
c. Positive feedback mechanisms are independent of negative feedback loops.
d. The change has the opposite action of negative feedback.
the change sense by the sensor is amplified
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The _________________________ valve controls the blood flow passing into the pulmonary trunk.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT a trigger for juxtaglomerular granular cells to release renin?
A) increased extracellular fluid water levels B) sympathetic stimulation C) decreased stretch of the granular cells of the afferent arterioles D) decreased filtrate NaCl concentration
Cuboidal indicates a triangular shape
Indicate whether the statement is true or false
What are the phagocytic specialists called that are within the air sacs (alveoli) of the lungs?
a. alveolar macrophages b. lung neutrophils c. respiratory phagocytes d. pulmonary scavengers e. air sac scavengers