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professor190 [17]
3 years ago
7

If skeletal muscles work to the point of fatigue, the muscle cells may not have sufficient oxygen to carry out aerobic respirati

on. What processes do muscle cells use if oxygen is not available for aerobic respiration?a. lactic acid fermentation b. citric acid cycle c. ethanol fermentation d. glycolysis
Biology
1 answer:
Anit [1.1K]3 years ago
7 0

Answer:

a. lactic acid fermentation

Explanation:

Under conditions of intense exercise, the oxygen gas obtained by pulmonary respiration may be insufficient to meet the needs of muscle cells in the work of obtaining energy from cellular respiration.

However, even in the absence of oxygen gas, our muscle cells can release the available energy in glucose, leading to even smaller amounts of ATP molecules. Under these conditions, muscle cells perform lactic fermentation, a process that is virtually identical to glycolysis (the first set of cellular respiration reactions), except that pyruvic acid is transformed into lactic acid with the formation of 2 ATPs.  Despite the lower energy yield, fermentation ensures the energy supply to the muscle. Lactic acid formed under these conditions has been associated with muscle pain and fatigue characteristic of intense physical exercise. Recent research, however, has shown that pain is caused by muscle fiber micro-injuries rather than lactic acid as it is rapidly metabolized and eliminated.

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Answer:

All of them are correct

Explanation:

Becuase the mom have freckles and the dad does not so the kid has a 50/50 chance of having freckles

the genotype chart would give you these four combinations so all of these awnsers will be correct

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1. Of the following people, Rosalind Franklin, James Watson, Francis Crick, and Maurice Wilkins, who may or may not have been gi
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Explanation:

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What is adhesion?(DEFINITION SHOULD BE SHORT-LESS THAN 10 WORDS
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Explanation:

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Read 2 more answers
Antennae development in ants is thought to be a trait controlled by maternal effect. In ants, zig-zag coils are dominant to curl
Schach [20]

Answer:

a. Her mother has zig-zag antennae.

b. Her brother has zig-zag antennae.

Explanation:

<u>Available data</u>:

  • Antennae development ⇒ controlled by maternal effect
  • Zig-zag coils are dominant
  • Curly coils are recessive
  • A female develops zig-zag coils

Maternal effect: Refers to the influence of the “environment provided by the mother” on the progeny phenotype. The mother´s genotype directly determines the progeny phenotype. Even though the progeny has a different genotype, it is irrelevant, as well as the father´s genotype or phenotype. This means that no matter what is the genotype of the offspring, all of them will express the same phenotype as their mother. The maternal effect is commonly seen in insects and might be seen in some mammals and plants.

So, if a female has zig-zag coils, this means that the mother also has zig-zag antennae and that all the brothers and sisters of this female ant have zig-zag antennae, independently of their genotype.

a. Her mother has zig-zag antennae ⇒ True. The trait is inherited from the mother.  

b. Her brother has zig-zag antennae ⇒ True. The whole progeny will express sig-zag antennae.

c. This female carries the zig-zag allele ⇒ Not necessarily.

d. This female's offspring will have zig-zag antennae ⇒ Depends on it´s genotype

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3 years ago
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