Which of the following is NOT true about the Na/K ATPase? It breaks down ATP O It brings 2 K out and 3 Na in O It is an example of active transport It is a transmembrane protein All of the above are true

Which of the following is NOT true about the Na/K ATPase? It breaks down ATP O It brings 2 K out and 3 Na in O It is an example of active transport It is a transmembrane protein All of the above are true

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A cell is placed in a hypertonic medium triggering its regulatory volume control mechanism. Which of the following statements best describes the main ion movement responsible for the regulatory volume control in this situation? Efflux of K+ from the cytosol. Efflux of Na+ from the cytosol. Influx of Na+ into the cytosol. Influx of K+ into the cytosol.
ATP is used directly in secondary active transport. Group of answer choices True False
Which of the following molecules is least like to enter a cell by simple diffusion? Oxygen Carbon dioxide Steroid hormones Fatty acids Sodium
*** fluorescence in bleached area- BLEACH WITH LASER BEAM bleach Protein 1 bleached area RECOVERY Figure 10-13 Molecular Biology of the Cell 6 (Garland Science 2015) Protein 2 *** ** *** time The diffusion/exchange rate of a protein can be measured by photobleaching techniques such as FRAP. When there is protein exchange (i.e. if the protein is mobile), fluorescence recovery in the bleached region occurs, as shown in the figure above. The graphs below show the fluorescence measurement of an area in the cell before and after bleaching for protein 1 and protein 2. Which protein has lower mobility? Protein 1 Protein 2 fluorescence in bleached area->> fluorescence in bleached area bleach BLEACH time RECOVERY time
An ion gradient is a source of potential energy that drives secondary transport processes in cells. True False
Which of the following has the largest impact on whether diffusion alone will move nutrients within an organism? Group of answer choices Shape of organism Size of organism Environment of organism Nutrient being moved Atmosphere around organism
Which of these can never cross the lipid bilayer without the help of a transporter or a channel? O CO2 O 02 O water O Na+ O all of the above can diffuse through the lipid bilayer without transporter proteins or channels
Diatomic oxygen (O2) exhibits which of the following membrane transport movements? A. it is not able to cross the membrane by passive transport, because it is big, polar, and inorganic it is not able to cross the membrane by active transport, because it is big, polar, and inorganic it is able to cross the membrane by facilitated diffusion, because it is small, polar, and organic it is able to cross the membrane by active transport, because it is big, nonpolar, and organic it is able cross the membrane by simple diffusion, because it is small, nonpolar, and inorganic
Which of the following statements is CORRECT in describing the nature of water channels? Group of answer choices It is a channel for the transport of any liquid medium. It is a non-gated channel. It is a channel that can facilitate the transport of sodium ions. It is a channel for active transport.
what transport proteins are involved is getting ca2+ out of cytosol
The net movement of potassium out of a cell (and sodium into a cell) occurs by: secondary active transport simple diffusion facilitated diffusion O primary active transport
Which of the following would be the most thermodynamically unfavorable membrane lipid activity membrane? (which is the hardest to do / least likely to occur) lateral diffusion rotation transverse diffusion (flip-flop) association with cholesterol