175. A 70-year-old man comes to the physician because of a 1-month history of heavy, pressing substernal chest pain that occurs when he walks up a flight of stairs. The symptoms are relieved by rest. The physician prescribes a drug to alleviate the symptoms. Within the cell, the drug acts by breaking down into a compound that binds to a protein to increase intracellular concentrations of cGMP, resulting in vasodilation. This binding most likely occurs in which of the following cell locations? A) Cytosol B) Golgi complex C) Mitochondria D) Nucleus E) Peroxisome F) Plasma membrane
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- 1. large particles including aggregates of macromolecules are ingested by some cells through phagocytosis?(true or false) 2. receptor-mediated endocytosis begins with binding of specific molecules to their receptors on the outersurface of the plasmamembrane (true or false)Mark and label the locations of pluripotent stem cells, adult/tissue stem cells and somatic cells in the diagram to the right. What potency is the red cell on top?5. Which of the following is NOT true about channel and carrier proteins? a) Carriers never form a direct opening between inside and outside the cell. b) Channels generally transport material faster than carriers. c) Only carriers are used for selective transport of materials d) All of the above are true about channel and carrier proteins. 6. If it can cross a membrane, a solute will move from a hyposmotic/hyperosmotic (circle or highlight the correct one) solution to a hyposmotic/hyperosmotic (circle or highlight the correct one) solution. 7. Water always moves from a hyposmotic/hyperosmotic (circle or highlight the correct one) solution to a hyposmotic/hyperosmotic (circle or highlight the correct one) solution.
- Phagocytosis of a bacterial cell by a macrophage, involves extensive remodeling of the actin microfilaments in the cell cortex to produce extensions of the plasma membrane and formation the phagocytic cup. Based on your knowledge of microfilament assembly/disassembly and related cell membrane deformation, explain the underlying processes that would be involved in formation of the phagocytic cup.4) Two membrane preparations have been made from the plasma membrane of erythrocytes (i.e red blood cells) and are being maintained in an isotonic buffer solution: (1) right-side-out membrane vesicles, in which the exoplasmic leaflet of the vesicle faces the buffer (equivalent in orientation to that of the exoplasmic leaflet of the intact plasma membrane); and (2) inside-out membrane vesicles in which the exoplasmic leaflet faces the interior of the vesicles and the cytoplasmic leaflet faces the buffer. 80 a. Right-side-out vesicles (ROVS) Very Low Fluorescence Inside-out vesicles (IOVS) Very High Fluorescence A newly discovered phosphoglyceride, called phosphotidylalanine is currently being studied. Annexin V is a protein that binds to phosphatidylalanine, which is one of the phospholipids present in the cell membrane preparations described above. Fluorescently labeled Annexin V is mixed with each vesicle preparation. The vesicles are washed to remove unbound Annexin V and then…QUESTION 1 Gap junctions are involved in O endocrine none of the other choices O neural paracrine QUESTION 2 Potassium ions enter a cell by active transport, diffusion O diffusion, diffusion active transport, active transport O diffusion, active transport QUESTION 3 O altering transcription signaling. Compared to water-soluble signals, lipid-soluble signals are more likely to produce their effects on the target cell by: activating enzymes at the plasma membrane opening or closing ion channels QUESTION 4 and exit a cell by Opening potassium ion channels in a neuron will lead to the cell interior becoming: less negative, which is hyperpolarization less negative, which is depolarization more negative, which is hyperpolarization O more negative, which is depolarization
- 2. Circle the correct bolded blue word. a. A substance that moves across a membrane "down" or "with" their concentration gradient is moving from the side with a higher / lower concentration of that substance to the side with a higher / lower concentration. This does / doesn't require energy input and is called active / passive transport. b. A substance moving "against" or "up" its concentration gradient is moving from the side with a higher / lower concentration of that substance to the side with a higher / lower concentration. This does / doesn't require energy input and is called active / passive transport. c. If the energy from the hydrolysis of ATP is directly used to pump the substance, the transport is called primary /secondary active transport. d. Ion-coupled transport is primary /secondary active transport and has two parts. First, the hydrolysis of ATP is used to power the creation of an ion concentration gradient. The ion is typically Na* or H*. Second, the energy stored in…Ion pumps and phagocytosis are both axamples of?I need help with a respiratory question, thanks During properly performed external chest compression on infants, how much should the sternum be compressed? Group of answer choices 1.5 in 0.5 in 2.0 in 1.0 in