Term
| Which statement concerning negative feedback is correct? |
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Definition
| Negative feedback exists when a change in a regulated variable triggers a response that opposes the change. |
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Term
| What does a membrane potential of +30mV represnt? |
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Definition
| There is a charge difference of +30mV across the palsma membrane and the inside of the cell is more positive compared to the outside. |
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Term
| Which statement regarding membrane proteins is incorrect? |
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Definition
| CAMs serve as binding sites for specific ligands (agonists). |
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Term
| Which sequence represents the correct hierarchy of biological organization? |
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Definition
| cell-tissue-organ-system-organism |
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Term
| _______ are physical adhering junctions, _______ are communicating junctions that allow the passage of ions from one cell to another and _____ are impermeable junctions that prevent any molecules from passing between cells. |
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Definition
| Desmosomes, gap junctions, tight junctions |
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Term
| If a typical body cell is placed in a hypertonic solution, the cell will... |
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Definition
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Term
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Definition
| Is used to calculate the resting membrane potential of a permeable ion. |
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Term
| Which of the statements concerning the plasma membrane is incorrect? |
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Definition
| The proteins found on the extracellular side of the plasma membrane match the proteins found on the cytoplasmic side of the plasma membrane. |
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Term
| Select the incorrect statement about connective tissue. |
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Definition
| It consists of densely packed cells within extracellular material. |
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Term
| Which of the following is not a function of membrane proteins? |
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Definition
| They serve to modify the fluidity of the membrane. |
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Term
| Which of the following body systems is not involved in maintaining homeostasis? |
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Definition
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Term
| Which extracellular fiber does not develop in scurvy? |
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Definition
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Term
| Diffusion results from... |
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Definition
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Term
| Select the incorrect statement about membrane permeability and ion potential. |
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Definition
| The large proteins in the cytoplasm that contains negative charge are permeable. |
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Term
| Which of the following substances is most likely to passively diffuse across the plasma membrane? |
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Definition
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Term
| The hormone insulin is released whe there's an increase of blood glucose. Insulin enhances the transport of glucose from the blood into most of the body's cells. If its secretion was regulated by a positive-feedback system, which of the following statements is correct? |
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Definition
| An increase in blood glucose concentration stimulates insulin secretion, which further increases the blood glucose concentration. |
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Term
| Receptor sites for neurotransmitters or hormones on the outer surface of the plasma membrane are made of: |
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Definition
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Term
| The resting membrane potential of a typical nerve cell. |
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Definition
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Term
| Assuming a membrane is only water soluble and there is no significant hydrostatic pressure, water will osmose from... |
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Definition
| A hypotonic solution to a hypertonic solution. |
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Term
| Which of the following does not require energy expenditure? |
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Definition
| Potassium efflus through leak channels. |
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Term
| Which of the following is a mechanistic rather than a teleological explanation of a physiological phenomenon? |
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Definition
| A person's stomach secretes digestive juices because it is stimulated by the food entering the stomach and activation of the nervous system. |
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Term
| By osmosis, water always moves to an area of higher... |
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Definition
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Term
| Which of the following statements concerning phospholipids is incorrect? |
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Definition
| Can combine with proteins to produce glycoproteins. |
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Term
| Ion that is the major contributor to formation of the resting membrane potential... |
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Definition
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Term
| The ion that has the highest permeability at resting membrane potential... |
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Definition
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Term
| Ion that is actively transported out of the cell at rest to maintain the resting membrane potential... |
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Definition
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Term
| Anion in greatest concentration in the ICF (intracellular fluid). |
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Definition
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Term
| The resting membrane potential is closest to te equilibrium potential of which ion? |
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Definition
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Term
| Ion whose equilibrium potential is opposite in charge of the resting membrane potential... |
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Definition
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Term
| The negative anion that has a high concentration outside of the cell. |
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Definition
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Term
| This tissue type is made up of cells specialized in the exchange of materials between the cell and its environment... |
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Definition
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Term
| Tissue responsible for initiation and transission of electrical signals... |
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Definition
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Term
| Skeletal, cardiac, and smooth are types of this tissue... |
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Definition
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Term
| This tissue type connects, supports, and anchors various body parts... |
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Definition
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Term
| The heart is made of this type of tissue... |
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Definition
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Term
| This tissue type is composed of cells specialized for contraction and moving limbs... |
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Definition
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Term
| Electrical gradient for K+ at resting potential... |
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Definition
| Ion tends to be move into the cell by this force. |
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Term
| Concentration gradient for Na+ at resting potential... |
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Definition
| Ion tends to be move into the cell by this force. |
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Term
| Concentration gradient for K+ at resting potential... |
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Definition
| Ion tends to be move out of the cell by this force. |
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Term
| Electrical gradient for Na+ at resting potential. |
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Definition
| Ion tends to be move out of the cell by this force. |
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Term
| Provides tensile strength. |
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Definition
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Term
| Enable tissue to stretch and recoil. |
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Definition
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Term
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Definition
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Term
| Is a cell that produces fibers in the extracellular matix... |
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Definition
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Term
| Facilitated diffusion is a passive process... (t/f) |
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Definition
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Term
| Surface carbohydrates in the plasma membrane serve as glycoproteins or glycolipids that act to attract "like" cells for tissue formation... (t/f) |
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Definition
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Term
| Homeostatic mechanisms operate primarily on the principle of negative feedback... (t/f) |
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Definition
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Term
| Exocrine glands produce secretions that are released through ducts to be deposited into a lumen. |
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Definition
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Term
| Phosphorylation of a carrier can alter the affinity of its binding sites, accompanied by a change in its confromation... (t/f) |
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Definition
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Term
| All molecule emit energy that cause continuous random motion unless they are in equilibrium in a solution... (t/f) |
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Definition
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