Epithelium 2 Quiz

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What type of secretion is produced by the serous glands?

Mucous secretion

Mucin granule secretion

Poorly glycosylated protein secretion (correct)

Water-soluble secretion

Where are goblet cells primarily found?

Parotid glands

Exocrine glands

Surface epithelium of the intestines (correct)

Sublingual glands

What is the mode of secretion in which the entire cell is sacrificed in producing secretion?

Mucous

Apocrine

Merocrine

Holocrine (correct)

Which gland is classified as a purely serous exocrine gland?

Pancreas Signup and view all the answers

What type of membrane lines cavities that connect with the outside of the body?

Mucous membrane Signup and view all the answers

What is the primary function of mucous glands?

Produce viscous, slimy secretion Signup and view all the answers

In which type of gland do acini contain both serous and mucous cells?

Sublingual gland Signup and view all the answers

What is the primary function of goblet cells?

Produce mucus Signup and view all the answers

How are exocrine glands classified based on the shape of their secretory units and ducts?

By the shape of their secretory units and ducts Signup and view all the answers

What is the main difference between exocrine and endocrine glands?

Exocrine glands secrete through ducts, while endocrine glands lack ducts and secrete into connective tissue and then to blood Signup and view all the answers

What does the term 'parenchyma' refer to in the context of glands?

The parts of an organ directly concerned with its function, i.e., the epithelial components of a compound exocrine gland Signup and view all the answers

How are exocrine glands classified based on their secretory component?

Unicellular and multicellular Signup and view all the answers

What is the function of endocrine glands?

To secrete hormones directly into the blood Signup and view all the answers

What are the useful definitions of 'parenchyma' and 'stroma' in the context of glands?

Parenchyma: The parts of an organ directly concerned with its function; Stroma: The supporting connective tissue Signup and view all the answers

What is the difference between mucous and serous membranes?

Mucous membranes secrete mucus, while serous membranes secrete serous fluid Signup and view all the answers

What is the basis of membrane potential in reference to the Goldman-Hodgkin-Katz equation?

It accounts for the relative permeabilities of different ions and their concentration gradients Signup and view all the answers

Which statement best describes the role of voltage-gated K+, Na+, or Ca++ channels in each phase of the action potential?

Voltage-gated channels generate the action potential and contribute to each phase in specific ways Signup and view all the answers

How does the Nernst equation account for both the chemical and electrical driving forces that act on an ion?

It considers the concentration gradient and the electrical potential difference across the membrane Signup and view all the answers

What is the primary function of electrotonic conduction in excitable cells?

To passively conduct electrical signals along the cell membrane Signup and view all the answers

What is the primary difference between electrotonic conduction and conduction of an action potential?

Electrotonic conduction is passive and graded, while conduction of an action potential is active and all-or-none. Signup and view all the answers

Where can electrotonic conduction be found in a neuron?

Dendrites Signup and view all the answers

What is the main advantage of salutatory conduction in myelinated axons?

It conserves energy and increases conduction speed. Signup and view all the answers

In which region of a neuron does the propagation of an action potential occur in non-myelinated axons?

Axon hillock Signup and view all the answers

What is the consequence on action potential propagation in the early stages of demyelinating diseases such as multiple sclerosis?

Action potential propagation frequency decreases due to increased resistance. Signup and view all the answers

What is the equation for calculating the net driving force (DF) in an excitable cell?

DF = Vm - Ei Signup and view all the answers

What determines the size of a graded potential in sensory transduction?

The strength of the stimulus Signup and view all the answers

What accounts for the absolute refractory period in action potential propagation?

Voltage-gated sodium channels Signup and view all the answers