Which of the following statements regarding endocytosis and exocytosis is correct?
A. Endocytosis is a method by which large molecules may be secreted from a cell.
B. Exocytosis is a method by which large molecules may be secreted from a cell.
C. Pinocytosis is a form of endocytosis; phagocytosis is a type of exocytosis.
D. Pinocytosis is a form of exocytosis; phagocytosis is a type of endocytosis.
E. Pinocytosis and phagocytosis are both types of exocytosis.
B
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All of the following changes are commonly observed in the cardiovascular system in response to aging EXCEPT
a) decreased cardiac output. b) increased compliance of the aorta. c) loss of cardiac muscle strength. d) decline in maximum heart rate. e) increased systolic blood pressure.
Select the correct statement about oxygen transport in blood:
A) During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2. B) During conditions of acidosis, hemoglobin is able to carry oxygen more efficiently. C) Increased BPG levels in the red blood cells enhance oxygen-carrying capacity. D) A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
The skin consists of different tissue types that perform specific activities and therefore is to be considered an organ.
Answer the following statement true (T) or false (F)
Local chemical influences on arteriolar radius include local __________ changes and __________ release
Fill in the blank(s) with correct word