Active Transport and Facilitated Diffusion of Ions

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What is the main function of microvilli?

Motion detection

Aiding in digestion (correct)

Sensing light

Connecting adjacent cells

Where are microvilli commonly found?

Small intestines (correct)

Male reproductive system

Endothelial cells

Cardiac muscle

Which structure is responsible for forming a strong cohesive epithelium by linking to cytoskeletons of adjacent cells?

Hemidesmosomes

Intermediate filaments

Microvilli

Zonula adherens (correct)

What is a characteristic feature that distinguishes stereocilia from microvilli?

Longer and less motile Signup and view all the answers

Where are hemidesmosomes located?

Lateral plasma membrane Signup and view all the answers

What is the diameter of microvilli?

0.2μm Signup and view all the answers

Through which structure does water move from the intestine into the blood?

Zonula occludens Signup and view all the answers

What is the main function of tight junctions in epithelial cells?

Preventing exchange between apical and basolateral plasma membrane Signup and view all the answers

Which protein is the most integral inside a tight junction?

Claudins Signup and view all the answers

Where are cilia most abundant in terms of cell type?

Cuboidal or columnar cells Signup and view all the answers

What is the function of desmosomes in epithelial cells?

Linking cells to underlying basement membrane Signup and view all the answers

Which intercellular junction type is responsible for controlling paracellular diffusion?

Tight junction Signup and view all the answers

In which process do molecules or ions move down their concentration gradient due to their kinetic energy until reaching equilibrium?

Vesicular active transport Signup and view all the answers

Which of the following transport systems involves molecules moving from high concentration to low concentration?

Antiport Signup and view all the answers

What type of molecules can diffuse through the lipid bilayer?

Neutral polar molecules Signup and view all the answers

Which process involves substances moving across the membrane against their concentration gradient by utilizing energy from ATP hydrolysis?

Sodium-potassium ATPase pump Signup and view all the answers

What is the main feature of symport and antiport mechanisms?

Movement of molecules in the same direction Signup and view all the answers

Which type of pump can be observed in the thick ascending limb of the kidney and helps in moving sodium, potassium, and chloride ions?

Sodium-potassium-chloride pump Signup and view all the answers

What is the major product of apocrine secretion?

Lipid droplets Signup and view all the answers

Which type of gland secretes substances via exocytosis from membrane-bound vesicles or secretory granules?

Merocrine gland Signup and view all the answers

Which glands undergo terminal differentiation and secrete substances via complete cell destructions?

Sebaceous glands Signup and view all the answers

Which gland type has secretory units with small ducts that converge at a larger duct?

Compound acinar gland Signup and view all the answers

Which example fits the description of a mixed seromucous gland?

Submandibular gland Signup and view all the answers

What is the common method of protein or glycoprotein secretion in most exocrine glands?

Secretion via exocytosis from secretory granules Signup and view all the answers

Active Transport and Facilitated Diffusion of Ions

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Questions and Answers

What is the main function of microvilli?

Where are microvilli commonly found?

Which structure is responsible for forming a strong cohesive epithelium by linking to cytoskeletons of adjacent cells?

What is a characteristic feature that distinguishes stereocilia from microvilli?

Where are hemidesmosomes located?

What is the diameter of microvilli?

Through which structure does water move from the intestine into the blood?

What is the main function of tight junctions in epithelial cells?

Which protein is the most integral inside a tight junction?

Where are cilia most abundant in terms of cell type?

What is the function of desmosomes in epithelial cells?

Which intercellular junction type is responsible for controlling paracellular diffusion?

In which process do molecules or ions move down their concentration gradient due to their kinetic energy until reaching equilibrium?

Which of the following transport systems involves molecules moving from high concentration to low concentration?

What type of molecules can diffuse through the lipid bilayer?

Which process involves substances moving across the membrane against their concentration gradient by utilizing energy from ATP hydrolysis?

What is the main feature of symport and antiport mechanisms?

Which type of pump can be observed in the thick ascending limb of the kidney and helps in moving sodium, potassium, and chloride ions?

What is the major product of apocrine secretion?

Which type of gland secretes substances via exocytosis from membrane-bound vesicles or secretory granules?

Which glands undergo terminal differentiation and secrete substances via complete cell destructions?

Which gland type has secretory units with small ducts that converge at a larger duct?

Which example fits the description of a mixed seromucous gland?

What is the common method of protein or glycoprotein secretion in most exocrine glands?

Where can stratified cuboidal epithelium be found?

What are the main functions of transitional epithelium?

Which histologic type of epithelium is relatively rare?

What is the main function of stratified columnar epithelium?

What special feature does transitional epithelium have to make it waterproof?

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