The lungs deliver a regular supply of oxygen to the blood, which is in turn circulated to most all the cells of the body. At the same time oxygen is consumed during aerobic cellular respiration within these cells. This implies that ________
A) oxygen will passively diffuse into the cells
B) oxygen requires active transport to enter most cells
C) the concentration gradient for oxygen is steepness inside of the cell
D) the rate of oxygen diffusion is independent of concentration
A
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The microscopic cylindrical-shaped unit of compact bone is called the ________.
A. endosteum B. cancellous C. osteon D. trabeculae
What are the two factors that are regulated to maintain fluid balance in the body?
a. salt concentration and blood pressure b. body temperature and blood pressure c. ECF pH and ICF pressure d. ICF volume and ICF osmolarity e. ECF volume and ECF osmolarity
A connective tissue sheath around cartilage is the
A. periosteum. B. ligament. C. endosteum. D. epiphyseal line. E. perichondrium.
All of the following cardiac measurements will increase during exercise except ____________________
A. end-diastolic volume B. end-systolic volume C. stroke volume D. cardiac output