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artcher [175]
3 years ago
11

Smooth muscle cells lack which protein(s)?

Biology
1 answer:
LuckyWell [14K]3 years ago
3 0

The correct answer is C. troponin only.

The smooth muscle cells contain similar elements like the cardiac and skeletal muscle cells including actin, myosin and tropomyosin but they contain troponin.

Smooth muscle tissues are non striated and produce their own connective tissue called endomysium. Smooth muscle cells also lack sarcomeres but have other thin and thick filaments along with actin and myosin contractile proteins.

Due to lack of troponin the cross bridge formation is regulated by the regulatory protein calmodulin instead of the troponin- tropomyosin complex.


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Classification od hornwort​
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Answer:  Traditionally, hornworts have been classified as bryophytes, together with mosses (division Bryophyta) and liverworts (division Marchantiophyta). In some classification systems, hornworts have been grouped as horned liverworts in the subclass Anthocerotidae (class Hepaticae), class Anthocerotopsida, order Anthocerotales.

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7 0
3 years ago
What is an estuary. ?
blagie [28]
<span>the tidal mouth of a large river, where the tide meets the stream.</span>
5 0
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Which part of the cell membrane prevents the cell from dissolving in water?
tia_tia [17]

The correct answer is:  the   " phospholipid bilayer "  .

__________________________________________________

             →   { which is hydrophobic (water-repellent) due to its waxy-like composition of many lipids.}.

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7 0
3 years ago
Read 2 more answers
Can anyone Help me please idk
devlian [24]
Region of the World                             Percentage    Value in Metric tons
North America                                          17                  23,332,500
Asia                                                          52                  71,370,000
Africa                                                          3                    4,117,500
Europe                                                     18                  24,705,000
Latin America and the Caribbean              8                  10,980,000
Oceania                                                  <u>   2</u>                <u>    2,745,000</u>
                                                               100                137,250,000

We multiply the 137.25 million metric tons by its percentage to get its equivalent value in metric tons.

Asia uses 71.37 million metric tons.

In making the bar graph, The vertical line will be the percentage and the horizontal line will be the region. Bars of each region should have different colors for easy identification. Spaces between bars should be present, so that the bar graph will not be confused with the histogram.
6 0
3 years ago
Voodoo lily is sensitive to the following poison..
Delicious77 [7]

Answer: D) antimycin

Explanation:

Voodoo lily is a water plant. The antimycin is a poison which can inhibit the electron transport chain during the process of photosynthesis or in cellular respiration. This acts by binding to the proteins that participate in the chain of electron transport.

4 0
3 years ago
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