Cells use transporters to move nearly all metabolites across membranes. But how much faster is a transporter than simple diffusion? There is sufficient information available for glucose transporters to make comparison. The normal circulating concentration of glucose in humans is 5 mM, whereas the intracellular concentration is usually very low […]

Q1. If a cube representing the cell is 5um on a side, compute the surface area to volume ratio, and explain why this is or is not a good size for a cell. Q2. What are the 4 factors that influence contractile force and the two that influence velocity and […]

1. Which of the following statements is correct about cardiac output?a. Cardiac output is determined by the heart rate and pulse.b. Stimulation of the sympathetic nerves decreases cardiacoutput.c. Vagal discharge increases cardiac output.d. Cardiac output is determined by heart rate and strokevolume. 2. Which of the following is least related […]

A 75-year-old man was found unconscious in his bathroom after falling and hitting his head. He survived for several hours but died later in the hospital. An autopsy was performed to determine the exact cause of death. Evidence indicated that the man had suffered two strokes, both due to blocked […]