BIOL 2404 Chapter 4 2025/2026 Exam
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Tissues - 🧠ANSWER ✔✔Groups of similar cells with a common function
Histology - 🧠ANSWER ✔✔The study of tissues
4 major tissue types - 🧠ANSWER ✔✔1. Epithelial
2. Connective
3. Muscle
4. Nervous
Tight Junctions - 🧠ANSWER ✔✔- Membranes between cells
merge and fuse
,- Located among cells that form
linings (SI), sheetlike layers
- Blood-brain barrier
Desmosomes - 🧠ANSWER ✔✔- Form "spot welds" between cells
- Structural reinforcement
- Located among outer skin cells
Gap Junctions - 🧠ANSWER ✔✔- Tubular channels between cells
- Molecules can move between cells
- Located in cardiac muscle cells = intercalated disks
- Muscle cells of the digestive tract
Epithelial Tissue - 🧠ANSWER ✔✔- Makes up glands
- Have a FREE surface on outside, and basement membrane to connect to
underlying tissue
- Usually lack blood vessels; nutrients diffuse from underlying connective
tissue
- Cells readily divide to produce new cells; injuries heal rapidly
, - Cells are tightly packed
Shapes of Epithelial Tissues - 🧠ANSWER ✔✔Squamous (Flat), Cuboidal
(Cube-Shaped), Columnar (Tall)
Layers of Epithelial Tissue - 🧠ANSWER ✔✔- Simple- one layer
- Stratified- multiple layers
- Pseudostratified- appears layered, but is not
Simple Squamous - 🧠ANSWER ✔✔- Single layer of thin, flat cells
- Substances pass easily through
- Thin & delicate, can be damaged
- Found in diffusion & filtration sites
- Lines air sacs (alveoli) & capillaries
- Lines blood & lymphatic vessels
- Most conducive to simple diffusion
Simple Cuboidal - 🧠ANSWER ✔✔- Single layer of cube-shaped cells
- Secretion and absorption
- Lines kidney tubules, thyroid follicles, found in other glands
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
Questions and Verified Answers |
Already Graded A+
Tissues - 🧠ANSWER ✔✔Groups of similar cells with a common function
Histology - 🧠ANSWER ✔✔The study of tissues
4 major tissue types - 🧠ANSWER ✔✔1. Epithelial
2. Connective
3. Muscle
4. Nervous
Tight Junctions - 🧠ANSWER ✔✔- Membranes between cells
merge and fuse
,- Located among cells that form
linings (SI), sheetlike layers
- Blood-brain barrier
Desmosomes - 🧠ANSWER ✔✔- Form "spot welds" between cells
- Structural reinforcement
- Located among outer skin cells
Gap Junctions - 🧠ANSWER ✔✔- Tubular channels between cells
- Molecules can move between cells
- Located in cardiac muscle cells = intercalated disks
- Muscle cells of the digestive tract
Epithelial Tissue - 🧠ANSWER ✔✔- Makes up glands
- Have a FREE surface on outside, and basement membrane to connect to
underlying tissue
- Usually lack blood vessels; nutrients diffuse from underlying connective
tissue
- Cells readily divide to produce new cells; injuries heal rapidly
, - Cells are tightly packed
Shapes of Epithelial Tissues - 🧠ANSWER ✔✔Squamous (Flat), Cuboidal
(Cube-Shaped), Columnar (Tall)
Layers of Epithelial Tissue - 🧠ANSWER ✔✔- Simple- one layer
- Stratified- multiple layers
- Pseudostratified- appears layered, but is not
Simple Squamous - 🧠ANSWER ✔✔- Single layer of thin, flat cells
- Substances pass easily through
- Thin & delicate, can be damaged
- Found in diffusion & filtration sites
- Lines air sacs (alveoli) & capillaries
- Lines blood & lymphatic vessels
- Most conducive to simple diffusion
Simple Cuboidal - 🧠ANSWER ✔✔- Single layer of cube-shaped cells
- Secretion and absorption
- Lines kidney tubules, thyroid follicles, found in other glands
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
