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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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_ venom targets Neurexins as a mechanism to block ________ ________.
Puffer fish, vesicle fusion
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Desert scorpion, Ca+ conductance
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Black Widow, vesicle fusion
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Black widow, Na+ conductance
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- Countercurrent exchange in the fish gill helps to maximise [Blank]. Question 20 options: diffusion osmosis active transport blood pressurearrow_forwardItem17 Item 17 Which is a passive transport process? Multiple Choice Phagocytosis Pinocytosis Receptor-mediated endocytosis Osmosis Ion pump Item18 Item 18 The type of vesicular transport by which large molecules or large amounts of substances are secreted from a cell is _________. Fill in the blank Fill in the blank Item19 Item 19 Materials tend to move less rapidly when their concentrations are significantly different between two compartments. Group startsTrue or False Item19 Item20 Item 20 As potassium diffuses down its concentration gradient, it moves out of the cell. However, this movement is resisted by the accumulating negative charge outside the cell. Group startsTrue or Falsearrow_forwardYou were introduced to osmosis in Chapter 8 earlier in the course. This week, Chapter 15 continues this discussion by introducing the cell membrane. For additional information, review one or two of the websites listed below. Osmosis: Real-life Applications How Is Osmosis Used in Kidney Dialysis? Guide to Forward Osmosis Applications Choose one way that osmosis and membranes are used in living things, medicine or industry. Describe how osmosis and membranes are used in the real-life application you chose. What are some of the materials necessary? Is an input of energy necessary?arrow_forward
- Match the below with the correct descriptions Pores across two plasma membranes [ Choose ] [ Choose ] Collagen Enzyme that synthesizes Cellulose Fibronectin Ingetrins Cellulose Synthase Complexes Fibril that provides the most Cadherins tensile strength in animal cells Connexons Cell surface receptor that links the ECM to the Intracellular environment [ Choose ] Fibroblast ECM protein that interacts with cell [Choose ] surface receptors Cell surface adhesion molecules that hold [ Choose ] cells together in a tissue structurearrow_forwardRead the paragraph. Despite its name, the Pacific sea horse is actually a type of fish. Its horse-shaped head gives it its name. This creature lives in the Pacific waters off the west coast of the Americas, from Peru to Southern California. Like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment. When a Pacific sea horse’s body loses water to its environment, which process is responsible? endocytosis exocytosis active transport osmosisarrow_forwardHello I need help with the missing blanks.arrow_forward
- Statement 1: The direction of diffusion of a solute across a membrane is determined by its concentration gradient and always moves toward equilibrium. Statement 2: In passive transport, solutes move down the gradient from a region of low concentration to a region of high concentration. A Both statements are true. Both statements are false. C) Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true.arrow_forwardI try answering the first question but not sure, can you please help me answer these questions and thanksarrow_forwardPlease help answer parts a-darrow_forward
- (Short Answer - 8 Sentences Max) The sodium-potassium pump maintains the electrochemical gradient across the membrane. Describe and explain how this process occurs.arrow_forwardQUESTION 6 Which definition is correct? Absorption = the movement of a substance into a lumen of a hollow organ Endocytosis = the removal of a substance from the body Exocytosis = the release of a substance from a cell into the interstitial fluid Secretion = the movement of a substance between epithelial cellsarrow_forwardSome animals are osmoconformers, meaning that they maintain the tonicity/osmolarity of their body fluids equal to that of the external environment. Hydroids, a type of cnidarian, are osmoconformers. But they don't move and thus are adapted to the environment they live in. A) What would happen if you take a marine hydroid and transfer it into a freshwater aquarium? B) What would happen if you take a freshwater hydroid and transfer it into a saltwater aquarium? C) Sharks are extraordinary osmoconformers. Bull sharks store urea in their tissues and use it to match the tonicity of their tissues to that of the surrounding environment. Some sharks can move from saltwater to freshwater, hypothesize what changes will sharks do in order to adjust when moving from saltwater to freshwater and vice versa. Explain your answer in terms of tonicity and specify the direction of water movement and urea concentration.arrow_forward
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