8. Which type of junctions are important for conducting electrical signals acros

Question

8. Which type of junctions are important for conducting electrical signals across smooth or cardiac

muscle?

9. Which junctions attaches cells to matrices?

10. What do we call a layer of flattened cells lining an inner or outer surface?

11. Where are we most likely to find ciliated simple columnar epithelium?

Simple squamous?

Simple cuboidal?

Pseudostratified columnar?

Stratified squamous?

Transitional

12. What are the visual similarities/differences between skeletal and cardiac muscle?

What are two physiological differences between skeletal and cardiac?

13, How are the 3 different types of muscle innervated?

14. How do we classify neurons?

Where do we find some of the different types?

Explanation / Answer

8. Gap junctions are important in conducting electrical impulses.

9. Desmosomes or cells to matrices are attached by cell to cell junction.

10. Stratified squamous epithelial layer.

11.* we find ciliated simple columnar epitheliumin intestine .

* we find simple squamous epithelium in lungs,blood and lymph vessels, capillaries, membranes which lines body cavities and cover the viscera.

* we find simple cuboidal epithelium in surface of ovaries, lining of nephrons, walls of renal tubules, parts of eye and thyroid.

* we find pseudostratified columnar epithelium in respiratory system.

* we find transitional epithelium in urinary bladder, urethra and uterus.

12. SIMILARITY: Skeletal muscle and cardiac muscle are striated or striped because their cells are arranged in bundles.

DIFFERENCE: Only difference is skeletal muscle is controlled by somatic nervous system and cardiac muscle is controlled by involuntary system.

PHYSIOLOGICAL DIFFERENCES:

*Cardiac muscle is spindle shaped where as skeletal muscel is cylindrical in shape.

*Cardiac muscles are short and when compared to them skeletal muscles are long.

13. Skeletal muscle is innervated by multiple motor system and cardiac and smooth muscles are innervated by multiple sensory system.

14. Neurons are classified based on number of processes extending from their cell bodies and are categorised as sensory neurons, motor neurons amd interneurons.

* sensory neurons collect information from eyes, nose, tounge and skin.

* motor neurons carry signals from brain and spinal cord to muscles.

* interneurons relays signals between sensory and motor neurons.

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