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exis [7]
2 years ago
10

A skeletal muscle is a composition of several components bundled one into the other. At which structural level in the muscle doe

s contraction occur to bring about contraction in the whole muscle?
Biology
1 answer:
Eduardwww [97]2 years ago
8 0

Answer: The options are not given, here are the options.

A. myofibril

B. muscle fiber

C. myoneural junction

D. tendon

E. fascicle

The correct option is C.

MYOFIBRIL.

Explanation:

structural level in the muscle that contraction occur to bring about contraction in the whole muscle is Myofibril because it is comprised of actin and myosin which are repeated units called sacromeres.These sacromeres are refer to as the basic functional units of muscle fibbers that play a role in the striation appearance of muscles and muscles contractions.

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If you have placed starch and water in the beaker and placed glucose and iodine inside the dialysis bag, what results would you
zepelin [54]
<h2>Answer:</h2>

<u>The osmosis will be observed in the beaker leading the movement of water into the dialysis bag from the beaker.</u>

<h3>Explanation:</h3>
  • Osmosis is the process of movement of water from a dilute solution to a concentrated solution through a semipermeable membrane.
  • In the beaker the solution will be dilute than the glucose iodine solution in bag.
  • Due to this concentration difference, the water water from the starch water solution is moved into the bag through the dialysis membrane.

Hence the process of osmosis will be observed.

8 0
2 years ago
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noah created a model of a glacier to help explain how glaciers change the surface of Earth. He froze two large blocks of ice. On
erastova [34]

Answer: The model is depicting the glacier erosion.

Explanation:

The glaciers are responsible for causing erosion of the earth. They transport the materials away from the locations were they are earlier situated. They carve the materials present beneath the land. They erode the materials like soil, pebbles, boulders, against the pressure of the unstable mass of the ice moving down the slope. The broken ice mass carriers away the broken rocks, materials and soil debris far away from the places where they have been originally situated. This causes the glacial erosion. Also the broken and displaced rocks displace the soil and other materials come in contact with during erosion.

According to the given situation, the ice formed with water only had no impact on the tinfoil on the other hand the ice containing the sand and rocks removed the tinfoil from places. This is because of the friction created by the sand and rocks on the tinfoil. The glacier material like ice, soil, rocks due to friction erode the material come in contact with it with an appreciable pressure underneath.

3 0
2 years ago
Assume you are investigating the inheritance of stem length in pea plants. You cross-pollinate a short-stemmed plant with a long
beks73 [17]

Answer:

75% would have long stems and 25% would have short stems.

Explanation:

7 0
2 years ago
A researcher observes membrane-bound structures in a cell. Based on this observation, the researcher can conclude that the cell
a_sh-v [17]
The answer you are looking for is: 
D.) Eukaryote 
Hope that helps!! 
Have a wonderful day!!
4 0
2 years ago
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Why does it make metabolic sense for the same hormone signal to stimulate glycogenolysis and inhibit glycolysis in the liver whi
Debora [2.8K]

This is because if the two  metabolic processes were to be  active at at the same time;  

Two molecules of<u> ATPs</u> and <u>Guanosine triphophate </u>(sometimes used for  energy transport) <u>will be expended per each cycle, with no  compensatory rate  of replacements present  at the moment in the cell,this  affects cell metabolism for energy availability</u>

<u>2</u> Both<u> Glycolysis and Gluconeogensis </u>are both<u> exergonic processes  in cells. </u> The  heat energy liberated from these Calorinogenic effects  will be higher than what the natural thermodynamic barrier of cells can withstand. Consequently;  the heat will raise temperature of the cells affecting metabolic activities of hormones and enzymes which are (proteins) ,and easily denature by high temperatures.    

However, in muscles cells,gluconeogeneis is a compensasory process of Glycolysis. This because during active exercise with high metabolic demand in muscles cells, glucose is rapidly metabolise  to to pyruvate,(but not at the rate that the Citric acid  cycle can  metabolise) for Lactic acid production by muscles cells for energy production.  Pyruvate must be broken down rapidly so that NAD+ will be available for  Glycolysis to continue. Therefore  to sustain Glycolysis at this rate  continuous supply of glucose is supplied  from Gluconeogenesis.

8 0
2 years ago
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