Answer:
1. Acetylcholine binds to receptors on the motor end plate
2. Ligand-gated channels open leading to depolarization
3. End plate potential triggers an action potential
4. Transverse tubules convey action potentials into the interior of the muscle fiber
5. Calcium is released from the sarcoplasmic reticulum
6. Calcium ions bind to troponin, which then moves tropomyosin
Explanation:
Acetylcholine (ACh) is a signaling molecule (neurotransmitter) that binds to receptors on muscle cells. This binding triggers the opening of ligand-gated sodium channels, thereby ions enter into muscle cells, which causes the depolarization of the sarcolemma and thus promotes the release of Ca2+ ions from the sarcoplasmic reticulum. The myoneural junction, also known as the motor endplate, is the site of synaptic contact between a motor axon and a skeletal muscle fiber. The endplate potential is the voltage that produces the depolarization of muscle fibers when ACh molecules bind to their receptors in the cell membrane. This depolarization spreads in the sarcolemma through transverse tubules (T tubules) and thus generates an action potential. Finally, this action potential induces the release of Ca2+ in the sarcoplasmic reticulum, which activates troponin protein and induces muscle contraction.
Question 3 of 10
A cell membrane is very specific about what it allows across. How does this
help the cell?
A. It helps the cell absorb as many different molecules as possible.
O B. The cell works better when it contains fewer proteins.
O C. Transport proteins allow only enzymes to pass through the
membrane.
D. It is better for the cell if most molecules are prevented from
entering
SUBMIT
Answer:
D
Explanation:
1. What was the dependent variable measured in the experiment?
A.the number of plants surviving after 30 days
B.plant height
C.pH of the water
D.the volume of water used to water the plants in the different groups
e. the mass of the plants in each group
Answer:
b.
Explanation:
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What does this timeline suggest about the feminist movement?
Answer:
B
Explanation:
What is the correct order of carbon dioxide as it leaves the respiratory tract?
Answer:
please give me brainlist and follow
Explanation:
Carbon dioxide (CO2) is transferred from returning blood back into gaseous form in the lungs and exhaled through the lower respiratory tract and then the upper, to complete the process of breathing.
Which biome receives the most rain?
tropical rain forest
temperate rain forest
taiga
tundra
Answer:
A, Tropical Rainforest
Explanation:
They get the most rain, more than 66 inches every year
Plsss help got to submitted today
Answer:
One interaction is between the deer and the grass the deer eats the grass and energy is transferred and then the mountain lions eats the deer and the deer's energy is transferred to the mountain lion
Explanation:
hears your answer :D
please help me it’s due in 20 minutes
Answer:
ok
Explanation:
1. p
2. n
3. n
4. p
5. n
6. p
7.p
8. n
Which type of ecosystem would be the most protected from environmental changes caused by
humans?
a. An ecosystem with the lowest amount of biodiversity
b. An ecosystem with a medium amount of biodiversity
c. An ecosystem with the highest amount of biodiversity
d. Biodiversity does not have anything to do with protection from environmental change.
Answer:
C or B hope it helps mkjhbb
Which is NOT a similar function of all cells?
A. photosynthesis
B. reproduction
C. absorption of nutrients
D. growth
Answer:
A
Explanation:
that is only plants
Sex linked genes are located on the
a. autosomes
b. the X chromosme only
c. the Y chromosome only
d. both the X and Y chromosomes
Answer:
d
Explanation:
Answer:
D. Both X and Y chromosomes
Explanation:
Sex linked is a trait in which a gene is located on a sex chromosome. In humans, the term generally refers to traits that are influenced by genes on the X chromosome. This is because the X chromosome is large and contains many more genes than the smaller Y chromosome.
In Minnesota, ecologists want to restore an abandoned cow pasture into a prairie ecosystem. The soil in the abandoned pasture is homogenous with high nitrogen content and is dominated by bunch grasses that prefer high nitrogen conditions and inhibit the establishment of other native prairie plant species. The ecologists decide to introduce native pocket gophers to the prairie to facilitate the restoration. Which of the following factors is improved by adding pocket gophers to the abandoned pasture?
A. Interspecific plant interactions inhibit plant growth and establishment.
B. Colonization is limited by poor dispersing plant species.
C. Plant establishment is limited by suitable "safe" sites that are protected from weather extremes
D. Herbivory can restrict establishment of plants that are attractive to herbivores.
Answer:
The factor that is improved by adding pocket gophers to an abandoned pasture is:
B. Colonization is limited by poor dispersing plant species.
Explanation:
In ecological management, colonization describes the action by a plant or animal to establish itself in an area. When pocket gophers are added to an abandoned pasture, the area is repopulated by these rodents. By their nature, pocket gophers move some quantity of soil annually, thereby aerating the soil. Moreover, they build tunnels, which they later abandon for other species as natural habitat. They also leave some waste products to fertilize the soil, making the ecosystem alive again.
The diagram below, best represents.
Answer:
B. An Ecosystem
Explanation:
A C and D do not fit the picture.
Polar Easterlies are winds that form at the ___ and the blow east to west
A.poles
B.west
C.east
D.equator
Answer:east
Explanation:
Polar easterlies are dry, cold prevailing winds that blow from the east. They emanate from the polar highs, areas of high pressure around the North and South Poles. Polar easterlies flow to low-pressure areas in sub-polar regions. Westerlies are prevailing winds that blow from the west at midlatitudes
In a few months, you receive a brief note from the breeder that he checked the four offspring and three have the purple trait and one has the white trait. Since only four offspring were produced, there are not necessarily enough offspring to observe the ratio you predicted. What is the probability of observing three purple and one white offspring: If the purple parent is Pp
Complete question:
1) Inspired by Gregor Mendel, you visit a local greenhouse to see what a pea plant looks like in person. You spot a plant in the corner and immediately notice that it exhibits the purple trait of the flower color character. This character is controlled by one gene with two alleles, the dominant purple P allele, and the recessive white p allele. Identify what you know for certain based on your observation. Check all that apply.
You know the genotype of the plant. This plant has at least one copy of the P allele.This plant must be heterozygous with respect to the flower color gene.You know the phenotype of the plant.2) In another corner of the greenhouse, you find another pea plant. This plant, however, exhibits the white trait of the flower color character. The greenhouse plant breeder approaches you and mentions that he plans to cross-fertilize the two plants that you have seen. He offers to let you know how the offspring turn out. Without realizing it, the breeder is actually conducting a
dihybrid cross testcross monohybrid cross3) If you were able to examine hundreds of offspring from this cross, what ratio of purple flowers to white flowers would you observe:
If the purple parent is PP ---------If the purple parent is Pp ----------4) In a few months, you receive a brief note from the breeder that he checked the four offspring and three have the purple trait and one has the white trait. Since only four offspring were produced, there are not necessarily enough offspring to observe the ratio you predicted. What is the probability of observing three purple and one white offspring:
If the purple parent is Pp? ----------If the purple parent is PP? ----------5) Based on the four offspring observed, you --------- (can/ cannot) know for certain whether the purple parent is Pp or PP.
Answer:
1)
This plant has at least one copy of the P allele. Because the plant is purple and the P allele is the one that codifies for this color. You know the phenotype of the plant. You can see that the plant has purple flowers, so you know its phenotype regarding flower color.2) A test cross
3)
If the purple parent is PP → 1:0 (100% heterozygous purple flowers, Pp)If the purple parent is Pp → 1:1 (50% Purple Pp, and 50% white pp)4)
If the purple parent is Pp? 3/4 = 75% purple and 1/4 = 25% whiteIf the purple parent is PP? 4/4 = 1 = 100% purple and 0 white5) Based on the four offspring observed, you CAN know for certain that the purple parent is Pp.
Explanation:
Due to technical problems, you will find the complete question, the answer, and the explanation in the attached files.
Muscles that produce movement in a single direction are
a. prime movers.
b. antagonists.
C. synergists.
O d. obliques.
Using the DNA strand below, select the answer choice that displays the correct polypeptide sequence. DNA TAC/GCA/TTA/GGC/AAC/ACT a Meth-Ile-Pro-Gln-Leu-stop b Meth-Arg-Val-Ala-Trp-stop c Meth-Arg-Asn-Thr-Ala-stop d Meth-Arg-Asn-Pro-Leu-stop
Answer:
d Meth-Arg-Asn-Pro-Leu-stop
Explanation:
This question is describing the processes of transcription and translation of protein synthesis. Transcription is the synthesis of mRNA from DNA while translation is the synthesis of amino acid from mRNA. In this question, the following DNA sequence is given:
TAC/GCA/TTA/GGC/AAC/ACT
- Following the complementary base pairing rule i.e A-U, G-C, T-A etc, the following mRNA transcript will be produced after transcription:
AUG/CGU/AAU/CCG/UUG/UGA
- Using the genetic code, the following amino acid sequence will be produced from the above mRNA sequence after translation:
Methionine/Arginine/Asparagine/Proline/Leucine/STOP.
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Body Systems and Organization
Answer:
the answer to the question is B
Answer:
B) The reproductive system.
Explanation:
The reproductive system provides humans with the ability to reproduce.
hope this helps and is right :)
45637456425637561457324751276567 x³+y³+z³=kf im homopfobic
Write down the classes of foods digested in the gut from the mouth to the duodenum?
Explanation:
The chyme is gradually pushed down the duodenum by peristaltic waves which flow down the length of the digestive tract. Most of the digestion of the protein, fats and carbohydrate in the chyme is done by the enzymes in the duodenum, before the resultant mixture is passed further into the small intestine.
explain how red colorblindness is inherited. why is this condition more common in males than in females
Answer:
From your parents DNA i believe
Explanation:
Describe two primary functions of the cell membrane.
Answer:
Explanation:
The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.
In the figure above, only the pathway labeled _____ requires oxygen.
a. A
c. C
b. B
d. A and B
how do you survive in mars
Explain how the process of photosynthesis could connect to a carbon neutral or carbon negative energy source
Here's link to the answer:
bit.[tex]^{}[/tex]ly/3a8Nt8n
Learn More:https://brainly.com/question/24212991
Which of the following are the main parts of the cardiovascular system?
A. thymus, lymph, lymph nodes, spleen, and tonsils
B. esophagus, stomach, small intestine, and large intestine
C. nose, pharynx, larynx, trachea, and lungs
D. heart, arteries, capillaries, and vines
Pls, help! I am currently taking a test with this question on it! I will mark brainliest if u are correct!
(D)
HEART,ARTERIES,CAPPILARIES,AND VINES
HOPE IT HELPS THANK YOU ☺
In a plant that has red flowers red flower color R is completely dominant to white flower color r if the plant is heterozygous for flower color which alleles will be carried by the gametes it produces
Answer:
Red flower color, R.
Explanation:
Red color, expressed as R, is a dominant trait. Dominant traits are always carried to offspring over recessive traits, such as white flower color.
RR = Red color
Rr = Red color
rr = White color
What are the names of the two imaginary lines that mark the end of the tropical zone around the equator?
Answer:
Tropic of Cancer marks the northern edge. Tropic of Capricorn marks the southern edge.
Explanation:
good luck
Answer:
longitude and latitude
The body is made up of systems that work together so that an organism can survive and grow. The musculoskeletal system contains muscles that move the body. How does the circulatory system help the muscles to function? OA. by transporting oxygen that can be used by the muscles to produce energy OB. by transporting oxygen that can be used by the muscles for sensing information OC. by transporting carbon dioxide that can be used by the muscles to produce energy OD. by transporting carbon dioxide that can be used by the muscles for sensing information
Answer:
yes
Explanation:yes
Which statement is an example of a qualitative measurement?
A
That structure is four meters long.
B
Water can have a cold temperature.
с
This solution has a temperature of 56° C.
D
Light travels at 3 x 108 m/s.
Answer:
The correct answer is - B. Water can have a cold temperature.
Explanation:
Qualitative measurement is a type of measurement that is not based on numerical or numbers but is completely based on the quality of the particular thing. It can be distinguished on basis of the term quality which is based on the character of the substance or condition whereas quantitive is which is based on numerics or numbers.
Among these, all the three choices have numerical measurement but the choice in which it is expressed that water can have cold temperature is qualitative measurement as cold is the quality of the water here.
Evolution can occur at different rates; however, for evolution to occur,
there must be *
A) variations within a species
B) extinction of the species
C) asexual reproduction
D) no change in the genes of an organism
Answer:
A (this is filler for the 20 characters needed)