Question 1

Cytoplasmic streaming depends on the protein ________.

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The answer of Cytoplasmic streaming depends on the protein ________....

Question 2

________ is a directional movement in response to a graded chemical stimulus.

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Question 3

________ muscle is nonstriated,whereas ________ and ________ muscle is striated.

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Question 4

Compare the sustained contraction of muscle cells in rigor mortis with that which results from the action of tetanospasmin (tetanus toxin)on motor neurons.

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The answer of Compare the sustained contraction of muscle cells...

Question 5

In order for a cell to crawl,it must produce a protrusion at the front of the cell (leading edge).One type of protrusion is a thin sheet called a(n)________; another is a pointed structure called a(n)________.

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The answer of In order for a cell to crawl,it...

Question 6

After death,the lack of ATP stops the dissociation of cross-bridges,and the muscle is locked in a stiff,rigid state called ________.

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The answer of After death,the lack of ATP stops the...

Question 7

Mutations in myosin VII result in an autosomal recessive disorder called ________ ,which is characterized by congenital profound hearing loss,problems in the vestibular system,and retinitis pigmentosum.

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Question 8

The microtubule-associated protein ________ provides motion toward the minus end of the microtubule.

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Question 9

Troponin is a complex of three polypeptide chains called ________,________,and ________.

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The answer of Troponin is a complex of three polypeptide...

Question 10

When migrating cells move toward a greater concentration of a diffusible chemical,the chemical is called a ________.

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The answer of When migrating cells move toward a greater...

Question 11

Tubulin subunits are added to growing cilia or flagella by ________.

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The answer of Tubulin subunits are added to growing cilia...

Question 12

Cilia and flagella in eukaryotes are similar in structure but vary in number,length,and function.For each of the following,contrast cilia and flagella:
a. number present per cell
b. length of appendage
c. direction of force generated relative to the direction of the appendage
d. function in unicellular and multicellular eukaryotes
e. motion analogy

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The answer of Cilia and flagella in eukaryotes are similar...

Question 13

In electron micrographs,the appearance of the T tubule with the terminal cisternae on either side appears as three circles called a(n)________.

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The answer of In electron micrographs,the appearance of the T...

Question 14

Movement of animals is dependent on skeletal muscle.The ability of muscle to contract is dependent on the structural organization of muscle fibers.
a. What is the fundamental contractile unit of skeletal muscle,which is composed of bands,lines,and a zone?
b. What are the letters that describe the bands,lines,and the zone?
c. What do these letters represent?
d. During contraction,the length of the muscle shortens due to changes within the contractile unit.What are the changes that take place with respect to the bands,lines,and the zone?

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The answer of Movement of animals is dependent on skeletal...

Question 15

Myofibrils are subdivided along their length by repeating units called ________,which are the fundamental contractile units of the muscle cell.

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The answer of Myofibrils are subdivided along their length by...

Question 16

The protein complex ________ facilitates the interaction between cytoplasmic dynein and the target.

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The answer of The protein complex ________ facilitates the interaction...

Question 17

The ________ account for 1015% of microtubules.

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Question 18

Cilia and flagella are comprised of a(n)________ connected to a(n)________.

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Question 19

You identify a protein that may play a role in microtubule-based transport.Propose a series of experiments that would aid you in confirming your assessment that this protein has a role in microtubule-based transport.

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The answer of You identify a protein that may play...

Question 20

Discuss how stereocilia work in the organ of Corti and how some chemotherapeutic agents and aminoglycoside antibiotics result in deafness.

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The answer of Discuss how stereocilia work in the organ...

Quiz 16: Cellular Movement: Motility and Contractility