Podcast
Questions and Answers
What is the function of the plasma membrane?
What is the function of the plasma membrane?
It envelops eukaryotic cells, separating the cell contents from the surrounding environment.
Which of the following are components of the plasma membrane? (Select all that apply)
Which of the following are components of the plasma membrane? (Select all that apply)
What are membrane-bound organelles?
What are membrane-bound organelles?
Organelles that are surrounded by a membrane.
Where are Golgi bodies typically located?
Where are Golgi bodies typically located?
Signup and view all the answers
Which stain reveals mitochondria in liver cells?
Which stain reveals mitochondria in liver cells?
Signup and view all the answers
What characterizes rough endoplasmic reticulum (RER)?
What characterizes rough endoplasmic reticulum (RER)?
Signup and view all the answers
Rough endoplasmic reticulum is only found in nerve cells.
Rough endoplasmic reticulum is only found in nerve cells.
Signup and view all the answers
What is a notable characteristic of smooth endoplasmic reticulum (SER)?
What is a notable characteristic of smooth endoplasmic reticulum (SER)?
Signup and view all the answers
Which organelle is associated with the pancreas?
Which organelle is associated with the pancreas?
Signup and view all the answers
Study Notes
Plasma Membrane
- Encloses eukaryotic cells, separating internal contents from the external environment.
- Composed of:
- Lipids: Phospholipid molecules and cholesterol.
- Carbohydrates: Oligosaccharide chains form glycolipids (attached to lipids) or glycoproteins (attached to proteins).
- Proteins: Includes peripheral and integral proteins.
Cytoplasm
- Contains both membranous and non-membranous organelles, as well as inclusions.
Membranous Organelles
-
Golgi Bodies
- Structure: Highly convoluted tubes lined with pseudo-stratified columnar epithelium.
- Site: Epididymis.
- Stain: Silver stain reveals dark brown granules in apical regions.
-
Mitochondria
- Structure: Polygonal arrangement in liver cells, radiating from central vein.
- Site: Liver.
- Stain: Iron hematoxylin shows dark blue, rod-shaped structures in cytoplasm.
-
Rough Endoplasmic Reticulum (RER)
-
In Nissl Granules (Nerve Cells)
- Composed of RER and free ribosomes.
- Stains show basophilic granules scattered in cytoplasm, indicating RER presence.
- Stains used: Hematoxylin & Eosin (HX & E) or Toluidine blue.
-
In Pancreatic Acinar Cells
- RER forms basophilic striations at the basal part of pyramidal-shaped cells.
- Stain: HX & E indicates localized distribution of RER.
-
-
Smooth Endoplasmic Reticulum (SER)
- Site: Lacrimal glands.
- Stain: HX & E shows highly acidophilic appearance in cytoplasm due to SER presence.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz focuses on the plasma membrane, a crucial component of eukaryotic cells that separates cell contents from the environment. It covers the structure and functions of the cell membrane, including its lipid composition and organelles involved. Test your knowledge on the essential role of the plasma membrane in cell biology.
