BCT - Week 8 Membrane Transport
swell and burst
A red blood cell placed in pure water would ________. A. shrink B. swell initially, then shrink as equilibrium is reached C. neither shrink nor swell D. swell and burst
a hypertonic solution
Crenation (shrinking) is likely to occur in blood cells immersed in ________. A.an isotonic solution B. a hypotonic solution C. a hypertonic solution D. blood plasma
B. hydrostatic pressure will decrease as blood moves away from the arteriole end of the capillary bed C. Osmotic pressure will remain constant throughout the capillary bed
In general, it is expected that ________.MACA A. hydrostatic pressure will rise as blood moves away from the arteriole end of the capillary bed B. hydrostatic pressure will decrease as blood moves away from the arteriole end of the capillary bed C. Osmotic pressure will remain constant throughout the capillary bed D. None is true
3 (exit) 2 (enter)
Primary active transport: ______ sodium ions exit for every _______ potassium ions to enter the cell. A. 2 B. 3 C. 4 D. 5 E. none
True
Sodium and potassium pump is an antiporter (T/F)
concentration gradient
The difference in the concentration of a substance from one location to another is called: A. Diffusion B. concentration gradient C. Osmosis D. Passive transport
True
The greater the concentration gradient, the faster the rate of diffusion. (T/F)
True
The greater the concentration gradient, the faster the rate. (T/F)
True
The secondary active transport uses energy. (T/F)
Active transport
The sodium-potassium pump helps to maintain electrolyte gradients through use of ATP. Which of the following best describes this type of transport? A. Diffusion B. Filtration C. Facilitated Diffusion D. Active transport
Symporter
What kind of membrane protein is the Na+/glucose (sodium glucose) transporter? a. antiporter b. symporter c. uniporter
Sodium moving out of the cells against its concentration gradient
Which of the following is an example of active transport in a cell? A. Calcium passing through channel proteins, from high to low concentration B. Sodium moving out of the cells against its concentration gradient C. Oxygen entering the cell without the use of energy
Water
Which of the following is transported across membranes via osmosis? a. Sodium b. Carbon dioxide c. Water d. Lipid