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29 Cards in this Set
- Front
- Back
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What are the two "modes" of secretion?
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merocrine and holocrine
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What is merocrine?
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product is secreted by exocytosis (i.e contents are secreted directly out of the cell into the extracellular space)
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What is holocrine?
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The gland literally ruptures...and the product is secreted
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Image of merocrine and holocrine modes
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Image of merocrine and holocrine modes
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The second type of tissue we are learning about is connective tissue. Where can this be found?
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connective tissue proper
cartilage bone blood |
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Connective tissue chart
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Connective tissue chart
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What are the 4 functions of connective tissue?
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binding/support, protection, insulation and transportation
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What is the common tissue of origin of connective tissue?
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mesenchyme (a loose connective tissue)
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Connective tissue has a nonliving extracellular matrix. This matrix consists of ______ ______ and ______
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ground substance, fibers
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What is "ground substance"?
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unstructured material that fills the space between cells
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What can the "fibers" be made of?
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collagen, elastic or reticular
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What is the function of "ground substance"?
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serves as a molecular "sieve" through which nutrients diffuse between blood cpillaries and cells
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Describe collagen fibers
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tough, provides strength
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Describe elastic fibers
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long, thin, stretchy
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Describe reticular fibers
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branched, delicate networks
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Name each connective tissue cell:
1. proper 2. cartilage 3. bone 4. blood |
1. fibroblasts
2. chondroblasts 3. osteoblasts 4. hematopoietic stem cells |
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Connective tissue cells can also be ______ blood cells, ______ cells or _______
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white
plasma macrophages |
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Connective tissue proper (loose) includes ______, ______ and ______
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areolar,
reticular adipose |
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What gives rise to ALL other connective tissue and is found in the embryo?
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mesenchyme: embryonic connective tissue
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Describe characteristics of areolar connective tissue
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1. gel-like matrix
2. wraps and cushions organs 3. all throughout the body |
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Connective tissue proper: loose
AREOLAR |
Connective tissue proper: loose
AREOLAR |
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Describe characteristics of loose connective tissue proper: adipose
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1. matrix has closely packed adipocytes
2. reserves food store, insulates 3. found under skin, around kidneys |
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Connective tissue proper loose: ADIPOSE
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Connective tissue proper loose: ADIPOSE
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Describe characteristics of loose connective tissue proper RETICULAR
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1. ground sub = reticular fibers
2. cells lie in a fiber network 3. soft internal skeleton, supports other cell types 4. found in bone marrow, spleen |
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Connective tissue proper: loose RETICULAR
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Connective tissue proper: loose RETICULAR
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What are characteristics of loose connective tissue proper: DENSE REGULAR?
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1. Parallel collagen fibers, few elastic
2. major cell type of fibroblasts 3. attaches muscle to bone, bone to bone 4. tendons, ligaments |
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Connective tissue proper: loose DENSE REGULAR
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Connective tissue proper: loose DENSE REGULAR
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What are characteristics of loose connective tissue proper, DENSE IRREGULAR?
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1. irregularly arranged collagen fibers
2. provides structural strength |
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Connective tissue properl; loose DENSE IRREGULAR
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Connective tissue properl; loose DENSE IRREGULAR
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