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| In a cross section through an artery and vein running parallel in your leg, which would be the artery? |
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Definition
| the vessel with more muscle tissue in the wall |
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| Which of the following is a critical feature of any effective transport molecule? |
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Definition
| molecules ability to release and hold on to |
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| A mutation results in a form of hemoglobin that has binding site for four molecules of oxygen, but does not exhibit cooperative binding. Which of the following would result? |
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Definition
| Each hemoglobin molecule would only bind one molecule of oxygen |
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| Recall that carbon dioxide can be transported in the blood in several forms. The transport of the majority carbon dioxide in the blood depends primarily on which of the following? |
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Definition
| Presence of carbonic anhydrase in red blood cells |
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Definition
| enzyme that catalyze the rapid conversion of carbonic acid to bicarbonate and proteins, active site contains zinc ion, metalloenzymes |
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| One of the main advantages of a closed circulatory system over an open circulatory system is the |
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Definition
| ability to direct the flow of blood to certain tissues |
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| Which of the following most accurately describes the structure of hemoglobin? |
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Definition
| Hemoglobin consists of a four protein chains, each of which has a heme group containing an iron ion. One hemoglobin molecule can bind a total of four 02 molecules. |
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Term
| In flowering plants, a vascular bundle in the stem contains both: |
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Definition
| Phloem cells and xylem cells |
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Term
| Adjacent plant cells are linked to each other by pores in the cell walls which are called: |
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Definition
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| The xylem in a flowering plant is made up of two kinds of cells, which are called: |
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Definition
| vessel elements and tracheids |
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| If the water in the soil space surrounding the roots of a plant has a w of -1.5MPa, which of the following values of w in the root cells would allow the plant to take up water from the soil? |
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Definition
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Term
| in addition to the plasma membrane, plant cells have a rigid________ surrounding each cell |
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Definition
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Term
| The absorption of water from the soil solution occurs in the ________, which are extensions of the root dermal layer |
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Definition
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Term
| Plants, in the process of photosynthesis, extract energy or ATP from _______ and us ________ as a source of carbon to build carbohydrates |
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Definition
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| What is meant by the term "fossil gene" (also referred to as "pseudogene")? |
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Definition
| A DNA sequence that is homologous to its functioning gene, but is not transcribed. |
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Definition
| As O2 binds to Hb, Hb becomes more and more susceptable to the binding of O2, to a certain extent. In a small increase of PO2 there is a steep increase in O2% saturation. |
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Term
| Three compensatory changes in icefish physiology |
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Definition
capillary density-more dense
capillary size-bigger
cardiac output-faster |
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Term
| The enzyme carbonic anhydrase is found at high levels in red blood cells of most vertebrates. What does this enzyme do? |
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Definition
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Term
| these vessels have valves that prevent backflow of blood |
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Definition
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| these vessels carry blood away from the heart |
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Definition
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| gas and nutrient exchange occurs across the walls of these vessels |
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Definition
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Term
| these vessels have a large inner diameter, but not very much smooth muscle in their walls |
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Definition
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Term
| these vessels connect arteries to capillaries |
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Definition
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| velocity of blood flow is lowest in these vessels |
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