Cell Surface Specializations

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What is the characteristic of the outer membrane?

It is smooth (correct)
It extends into the interior of the mitochondrion
It forms incomplete alternating shelves
It has cristae

What is the function of the inner membrane?

To provide a smooth surface
To increase the surface area of the mitochondria
To extend into the cytoplasm
To form incomplete alternating shelves (correct)

What is the shape of the cristae?

Helical
Tubular
Spherical
Incomplete alternating shelves (correct)

Where do the cristae extend?

Into the interior of the mitochondrion (C) Signup and view all the answers

What is the purpose of the cristae?

To increase the surface area of the mitochondrion (C) Signup and view all the answers

What is the shape of the surface of the vesicles that faces the base of the cell?

Concave (D) Signup and view all the answers

What is the electron microscope composed of?

Three types of membranous components (B) Signup and view all the answers

What is the function of the transport vesicles mentioned in the text?

To transport proteins from the RER to the flatted vesicles (D) Signup and view all the answers

What is the shape of the outer surface of the flatted vesicles?

Convex (D) Signup and view all the answers

What is the structure of flattened vesicles (Cisternae) in the electron microscope?

Elongated parallel sacs piled one upon the other (B) Signup and view all the answers

Which surface of the flattened vesicles faces the cell surface?

Inner concave surface (A) Signup and view all the answers

Where do the transport vesicles carry proteins from?

Rough endoplasmic reticulum (D) Signup and view all the answers

What is the function of the cis surface of the flattened vesicles?

Formation of the vesicle (C) Signup and view all the answers

What are the vesicles mentioned in the text sites of?

Protein concentrations (C) Signup and view all the answers

What is the shape of the electron microscope's membranous components?

Three flattened shapes (A) Signup and view all the answers

What is the optimal pH for lysosomal enzymes?

Acidic (B) Signup and view all the answers

What is the primary cause of lysosomal storage diseases?

Deficient accumulation of metabolic products (A) Signup and view all the answers

Which of the following is NOT a function of lysosomes?

Synthesis of proteins (D) Signup and view all the answers

What is the process by which cells take up fluid droplets?

Pinocytosis (C) Signup and view all the answers

What is the term for the vesicles that form when the cell membrane surrounds fluid?

Pinocytic vesicles (B) Signup and view all the answers

What is the result of the fusion of pinocytic vesicles in the cytoplasm?

Multivesicular bodies (D) Signup and view all the answers

Which structure stains black with osmium tetra-oxide?

Myelin (A) Signup and view all the answers

Which type of cell surface specialization is referred to as 'Brush B'?

Kidney Microvilli (D) Signup and view all the answers

Which cell surface specialization is associated with absorptive cells?

Microvilli intestinal (A) Signup and view all the answers

What is described by the term 'interdigitations' in lateral surfaces?

Interdigitations (C) Signup and view all the answers

What are Nexus junctions classified as?

Gap junction (C) Signup and view all the answers

Which term refers to modifications of the apical cell surface?

Microvilli (A) Signup and view all the answers