BIOLOGY HIGH SCHOOL

Which phase lasts longest during an action potential in a ventricular contractile fiber?

Answers

Answer 1
Answer:

Phase 2, a plateau phase, is the longest phase. It is unique among excitable cells and marks the phase of calcium entry into the cell. Phase 3 is the phase of rapid repolarization that restores the membrane potential to its resting value.

Related Questions

Eutrophication is always the result of human activity. true or false
which of the following brain regions controls drives, instincts, and emotion?A. limbic systemB. thalamusC. cerebrumD. cerebellum
Vascular plants are known to have arisen from the non-vascular plants. Which of the following features differentiates bryophytes from the vascular plants? a. presence of flavonoids. b. dominant haploid phase in life cycle. c. absence of cuticle.
explain why the direction along which the electromagnetic wave travels is not the same as the direction along which the changing electric field is applied.
The Amish population who migrated from Europe to the United States had very few individuals in their population. Additionally, their gene pool shows very few alleles due to inbreeding. A genetic trait called polydactyly (having six fingers), which is rare in other populations, is common amongst them. What kind of evolutionary effect is exhibited in this example?A. MutationB. Natural selectionC. Founder effect

Why is carbon so abundant in living things when oxygen is the most abundant element on Earth? Carbon atoms can bond with one another to make chains and cyclic structures whereas oxygen atoms cannot form chains or cyclic structures.
Carbon atoms are found in compounds that are solids at room temperature whereas oxygen atoms are found in compounds that form gases
Carbon atoms have lower mass than oxygen atoms, which keeps the masses of living things within desirable limits.
Carbon atoms are more stable than oxygen atoms, which allows living things to have more stable compositions.

Answers

Carbon is so abundant in living things even though oxygen is the most abundant element on Earth because carbon atoms can bond with one another to make chains and cyclic structures whereas oxygen atoms cannot form chains or cyclic structures.
The correct answer is the first option. 

Aluminum is an element. Which best describes what makes up a sample of aluminum?

Answers

Answer:

one kind of atom

Explanation:

Answer:

one kind of atom

Explanation:

Which of the following levels is the least inclusive, smallest, and most specific of the choices? A. Kingdom B. Order C. Family D. Phylum

Answers

The correct answer is C. Family. That is because the only things smaller than family are genus and species and they are not mentioned here. Life and domain are larger than kingdom and kingdom is larger than phylum. Class and order are smaller than phylum but are larger than family. That's why your correct answer is family.

In a relay race, the probability that team Sapphire wins is 22%. In another unrelated relay race, the probability that team Emerald wins is 47%. How many percent probability both teams lose their races?

Answers

P(sapphire wins) = .22
P(sapphire loses) = 1-.22 = .78
 
P( emerald wins) = .47
P( emerald loses) = 1- .47 = .53
 P ( sapphire loses & emerald loses ) = P( sapphire loses) * P(emerald loses) = 0.78*0.53 = 0.4134 

Which multiplied by 100 means 41.34%. I hope that this is the answer that you were looking for and it has helped you.

Many differences in gene sequences between species, and also among individuals within a species, consist of single nucleotide polymorphisms. Choose the statement that best explains why these types of differences are among the most common DNA changes observed?

Answers

Answer:

A single nucleotide polymorphism (SNP) is the most common gene variation found among people. A SNP represents a change in a single DNA block, called a nuecleotide, being able, for example, to replace a nucleotide cytosine (C), with a nucleotide thymine (T), guanine (G) or adenine (A) in the genome. They represent the 90% of all the human gene variations.

Explanation:

Which of the following statements is true for a eukaryotic cell?A. Does not possess intracellular membrane bound organelles. Everything inside just floats freely in the cytoplasm.
B. Possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes.
C. Possesses simple duplex DNA in the form of a circular loop.

Answers

Possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes. The correct option is B.

What is eukaryotic cell?

Eukaryota is a varied domain of creatures whose cells have a nucleus, and its members are referred to as eukaryotes.

Eukaryotes include all animals, all plants, all fungi, and many unicellular creatures. They are a part of the Eukaryota or Eukarya group of organisms, one of the three categories of life.

Animals, fungi, plants, and protists all have eukaryotic cells. DNA is typically housed in the nucleus, an organelle that is encircled by a membrane known as the nuclearenvelope.

A nuclear membrane is present in eukaryotic cells. It has a cell wall, mitochondria, and Golgibodies.

It also has cilia and flagella, which are locomotory organs. The DNA in the nucleus contains all of the genetic data.

Thus, the correct option is B.

For more details regarding eukaryotes, visit:

brainly.com/question/29119623

#SPJ6
B. is the correct answer.
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Which of the following is NOT an example of genetic variability?A) A population of snails has phenotypes that range from tan to dark brown. B) An asexually reproducing single celled organism produces 10 offspring in its lifetime. C) Allele #1 for wing size in a butterfly has the following sequence of bases: GGAT, while Allele #2 has this sequence: GGAC.
1. If the strength of the magnetic field at A is 64 units, the strength of the magnetic field at B is _____. A. 16 units B. 32 units C. 128 units D. 256 units 2. If the strength of the magnetic field at B is 6 units, the strength of the magnetic field at A is _____. A. 1.5 units B. 0.75 units C. 24 units D. 10.6 units