Term
| Relative volumes of major membranous organelles |
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Definition
| Cytosol, Mitochondria, ER, Nucleus are the most |
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Term
| Organelles import proteins by 3 mechanisms... |
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Definition
Nucleus:nuclear pores
Cytoplasm - Organelles: Protein translocators
ER - organelles: vesicles |
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Term
| What targets proteins to their destinations? |
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Definition
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Term
| Signal sequences are necessary... |
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Definition
| ...and sufficient for protein targeting. |
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Term
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Definition
v-SNARE: vesicle SNARE
t-SNARE: target SNARE
*about 20 different types of SNAREs in animals, each associated with particular organelle. |
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Term
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Definition
Constitutive: default pathway, secret material for the extracellular matrix.
Regulated: occurs in response to signal by cells specialized for secretion (insulin). |
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Term
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Definition
Phagocytosis: large molecules, via vesicles called phagosomes.
Pinocytosis: "cellular drinking" via small vesicles. |
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Term
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Definition
| Endocrine, Contact, Paracrine, Neuronal |
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Term
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Definition
| not having a receptor for a specific signal |
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Term
| 2 classes of extracellular signaling molecules |
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Definition
1. Molecules that are to large or hydrophilic to cross plasma membrane
2. Molecules that are small enough or hydrophobic so they cross the plasma membrane. |
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Term
| 3 classes of cell surface receptors |
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Definition
| ion channel linked receptor, Gprotein linked receptors, Enzyme linked receptors. |
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