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deff fn [24]
3 years ago
9

What is the answer is it. A b c or d

Biology
1 answer:
rodikova [14]3 years ago
3 0
The answer is b) DNA to RNA to proteins
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The muscular system is made up of Multiple choice question. all the muscles plus the nerves attached to them. all the muscles, l
umka2103 [35]

Answer:

all the muscles.

Explanation:

The muscular system is composed of all muscles in the body. The main function of the muscles is to produce movement in different parts, voluntary or involuntary, creating equilibrium. Muscles are made of myocytes. There are three types of muscles: smooth muscle,  skeletal muscle, and myocardium.

  • The smooth muscle is formed by fusiform cells, mononucleated, and no transversal striations. There is a protein contraction system, but not as organized as the one of the skeletal muscle.  

Smooth-muscle can be found in organs, vessels, veins, and arteries. It provides sustained contractions, slow and rhythmical, but not voluntary.  

  • Skeletal muscle is the most abundant muscle in vertebrates, constituting the somatic musculature. It proportionates motion to extremities and digits and is responsible for the position and posture of the individual. It is also involved in eye movements, respiration, mastication, deglutition, and phonation. It moves the tongue, the superior esophagus, and the pharynx.  

The skeletal muscle is innervated by axons of the motor neurons coming from the CNS. The contraction of the skeletal muscle is voluntary and fast.  

Cells composing the striated muscle are significantly long and multinucleated. They arrange in bundles, where cells are parallel to each other.  

  • Myocardium tissue is more similar to the striated tissue than to the smooth one. However, there are some differences between them. Cardiac cells are cylindrical and smaller, with ramifications. Cardiac cells only have one nucleus, and occasionally there can be two. Actin and myosin filaments are arranged just as the skeletal ones, and the contraction of cardiac cells is molecularly very similar to the skeletal

5 0
3 years ago
27. What is the major reactant needed for the Citric Acid Cycle (aka Krebs Cycle)?
sp2606 [1]

Answer: b. Acetyl Co-A

Explanation:

Acetyl CoA produced through pyruvate, amino acids, and fatty acids are oxidized in the Krebs cycle in CO2, obtaining as products NADH, FADH2 and GTP (ATP). Parallel to this oxidation, the Krebs cycle produces compounds used as precursors for biosynthesis. As it is a cycle, an oxaloacetate molecule could, in principle, oxidize an amount indefinite of acetyl CoA. Acetyl-CoA is formed from the oxidative decarboxylation of pyruvate, sequentially performed by pyruvate dehydrogenase -PDH (complex multi enzymatic of 3 enzymes), in the mitochondrial matrix.

5 0
3 years ago
Which if these is an example of behavioral isolation
Lubov Fominskaja [6]

“Two species of crickets, Gryllus rubens and Gryllus texensis, have different courtship songs which can be identified only by the opposite sex of their own species” is an example of behavioral isolation.

 

Behavioral isolation is an important evolutionary mechanism that helps members of the same species identify each other as proper mates.

 

The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.


3 0
3 years ago
What is protocooperation
ziro4ka [17]
<span>Protocooperation is where two species interact with each other beneficially; they have no need to interact with each other.</span>
5 0
3 years ago
Read 2 more answers
Cell membranes are selectively permeable, regulating which substances can pass through, as well as how much of each substance ca
Veseljchak [2.6K]

Answer:A=V

Explanation:

It is used to move small or non polar molecules does not apply to facilitated diffusion. Small, non-polar molecules can diffuse directly across the phospholipid bilayer.

4 0
3 years ago
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