The rate of the forward step is much greater than that of the reverse step. Simple diffusion is a common mechanism for the transport of uncharged substances. Both primary and secondary active transport processes require energy. A connective B epithelial C exonuclear D nerve E muscle Definition epithelial Term 6 What type of gland secretes products into ducts leading to the external environment? C Beta cells secrete insulin. Would this treatment result in a higher or lower sperm count, and why? The M metaphase checkpoint, triggering entry into anaphase. D Cells engulf large particles, such as bacteria, by phagocytosis.
Term Which of the following statements about glucose cotransport with sodium is true? Recent news stories have highlighted the fact that most bottled water comes from municipal water supplies the same source as your tap water , although it may undergo an extra purification step called reverse osmosis. E Delta cells secrete somatostatin. During an infection, one protein in this system activates the next in a cascade of reactions. D The pump is also an enzyme. Which statement about osmosis is not true? C Water will leave the cell. B There is insufficient information to answer this question. As K+ loses its waters of hydration it begins to interact with protein carbonyls in the channel.
C is circular in structure. D The concentration gradient for oxygen increases and oxygen movement into the cell increases. Which way will albumin move? A Muscle tissue is specialized for contraction and generation of force. C They are toxic to humans. .
A Endospores are for reproduction. The membrane must not permit passage of the solute. Assume the left beaker contains 3 mM NaCl, 8 mM glucose, and 9 mM albumin. Restricting movement of proteins and phospholipids within the cell membrane E. It allows for independent regulation of the two pathways.
Which statement best describes the plasma membrane? D A cell produces one endospore and keeps growing. If two solutions having different osmolarities are separated by a water-permeable membrane, will there be a change in the volume of the two compartments if the membrane is impermeable to solutes? E Homeostasis is the maintenance of the internal environment. B Cells non-specifically engulf extracellular fluid. Connecting the interior of adjacent cells through the presence of connexons Which of the following statements regarding the sequence of events shown here is true? E Glucose moves into the cell while sodium moves out of the cell. Which of the following is true regarding the mitotic phase of the cell cycle? Referring to the active transport simulation, are Na+ and K+ transported in the same direction? Suppose a thistle tube containing a 5% sugar solution is covered at one end by a differentially permeable membrane and is placed in a beaker containing a 10% sugar solution. What happened when sodium chloride was added as a solute in the left beaker? Because that's the problem for a bacterial cell, it cannot control the tonicity due to solute concentrations in the surrounding water. Diffusion is a physical process.
B Diffusion rate will progressively decrease until zero. Simply reveal the answer when you are ready to check your work. Towards The NaCl Side 3. The entrance of the channel accommodates a hydrated K+ ion. The cardiac cycle consists of a period of heart contraction called systole and a period of heart relaxation called diastole.
The passage of salt Na+Cl- across a plasma membrane is of primary importance in cells. Assume the left beaker contains 3 mM NaCl, 8 mM glucose, and 9 mM albumin. Crystals of dye, when placed in a beaker of water, eventually spread evenly throughout the water. B The cell will undergo osmotic lysis. Which of the following would increase the rate of facilitated diffusion? Each phospholipid molecule has one polar head. Late in the G 1 stage of the cell cycle, triggering the cell to move into the S … phase.
The beaker must have less water per unit volume than in the tube. Facilitating communication between cells B. The cell membrane is permeable to water but impermeable to solutes. Which of the following is not true regarding nucleotides? E Epithelial tissue lines the lumen of internal organs. They form pores in the membrane. The concentration of iodine by the cells of the thyroid gland is an example of 18.
In the reverse osmosis process, pressure is applied to the tap water tank to force the water molecules across the membrane into the pure water tank. Increasing the of membrane pumps 7. Red blood cells must be kept in a plasma that is hypotonic to the cells. As cells become more active and oxidative phosphorylation increases in the cell, which of the following occurs? D Water will move into the cell. B Endospores allow a cell to survive environmental changes by producing a dormant period with no growth. At this point in writing your tutorial, you have to find a way to get across to the students the importance of a cell wall to a bacterium.