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Questions and Answers
Which of the following cell types is NOT found in blood tissue?
Which of the following cell types is NOT found in blood tissue?
- Lymphocytes
- Red blood cells
- Fibroblasts (correct)
- Neutrophils
What is the primary function of a fibroblast?
What is the primary function of a fibroblast?
- To produce and secrete collagen fibers (correct)
- To contract and allow for movement
- To transport oxygen throughout the body
- To defend the body against infection
Which type of tissue is characterized by cells that are packed tightly together with little intercellular space?
Which type of tissue is characterized by cells that are packed tightly together with little intercellular space?
- Muscle tissue
- Connective tissue
- Epithelial tissue (correct)
- Nervous tissue
In a negative feedback loop, what is the role of the effector?
In a negative feedback loop, what is the role of the effector?
What is the primary difference between negative feedback and positive feedback loops?
What is the primary difference between negative feedback and positive feedback loops?
Flashcards
Tissue
Tissue
Groups of cells that are similar in structure and perform a common function.
Homeostasis
Homeostasis
State of relative consistency of the internal environment.
Negative Feedback Loop
Negative Feedback Loop
A process that counteracts a change to maintain balance.
Positive Feedback Loop
Positive Feedback Loop
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Receptor
Receptor
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Study Notes
Tissue
- Tissues are groups of similar cells performing common functions.
- Examples of tissue types include simple squamous (lungs), simple cuboidal (kidney), and simple columnar (intestine).
Tissue Types
- Fibroblasts (cells) within various tissues, including epithelium, adipose tissue, and tendons, feature:
- Nuclei
- Elastic fibers
- Collagen fibers
Specialized Tissue Types
- Adipose tissue: characterized by fat cells (with nuclei) and vacuoles containing fat droplets
- Tendon: tissue comprised of fibroblasts and collagen fibers
- Bone: containing lacunae (small spaces), lamellae (thin layers), and a central canal.
- Blood: composed of red blood cells, lymphocytes, and neutrophils (cells).
Cells
- Cells lack transmembrane receptors for hormones, cytokines, and neurotransmitters (missing).
Protein Synthesis
- A simplified schematic of protein synthesis exists (missing details in this summary due to lack of description).
Homeostasis
- Homeostasis is the internal environment's relative consistency.
- Maintained through negative feedback loops.
Negative Feedback Loop
- Step 1: Stimulus causes the variable to change.
- Step 2: Receptor detects the change in the variable.
- Step 3: Control center processes information and sends signals via an afferent pathway.
- Step 4: Effector carries out a response via an efferent pathway, countering the variable change.
- Step 5: Response reduces any further change in the variable, maintaining balance.
Positive Feedback Loop
- (Notes unavailable in this summary)
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