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2 years ago

Question 19 Neurotransmitters are typically stored in which of the following parts of a neuron?

Biology

1 answer:

Agata [3.3K]2 years ago

4 0

Answer:

Neurotransmitters are synthesized by neurons and are stored in vesicles, which typically are located in the axon ’s terminal end, also known as the presynaptic terminal. The presynaptic terminal is separated from the neuron or muscle or gland cell onto which it impinges by a gap called the synaptic cleft.

Explanation:

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In the Miller-Urey experiment, electrical sparks were passed through a mixture of gases, including hydrogen, water vapor, methan

STatiana [176]

Answer:

The answer is B. Some organic molecules, including amino acids, could have been produced from chemical reactions on early Earth.

Explanation:

Miller-Urey Experiment:

The Miller-Urey experiment was an attempt to explain the origin of life on Earth. Miller-Urey simulated the primordial soup i.e. the environment of primitive Earth to prove the spontaneous generation of organic molecules. The conditions they introduced included:

A methane-ammonia-hydrogen and water mixture that exactly simulated the primordial soup.
A spark of 70,000 volts that simulated lightening.
A temperature of 800 degree Celsius.

Observations:

After running for 18 days, the final solution was examined for presence of organic molecules.
Miller-Urey observed that most of the methane and ammonia had been consumed and the mixture contained carbon monoxide and nitrogen.
The solution further contained 25 amino acids (mainly, glycine, alanine and aspartic acid) , several fatty acids , hydroxy acids and amide products.

The experiment concluded that simple organic compounds such as amino acids could have been formed through spontaneous generation under the Earth's primitive environmental conditions.

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2 years ago

In the Cori cycle, when glucose is degraded by glycolysis to lactate in muscle, the lactate is excreted into the blood and retur

Fantom [35]

Answer: Cori cycle consumes more energy,it expended 4ATPs, therefore with poor efficiency.

1 Glyceraldehyde 3-phosphate dehydrogenase.

it is an enzyme which functions in Glycolysis only, to breakdown the 6th. step of of subtrate phosphorylation of glucose.

2. glucose-6-phosphotase.

This is the enzyme that works in gluconeogenesis only to intiaate its first step. it hydrolyse glucose-6-phosphate , to generate glucose and phosphate.

Alcohol dehydrogenase

This enzyme does not play any role with both pathways.Rather it catalysis the oxidation of primary and secondary alcohols to aldehyde and ketones. The reaction involves reduction with NADH+

phosphoenopyruvate carboxykinase

functions in the gluconeogensis pathways for conversion of oxaloacatate to phosphoenopyruvate and CO2.

Phosphofructokinase-1

function as regulatory enzyme of glycolysis to convert fructose-6-phosphate and ATP hydrolysis to glucose 1, 6, bisphosphate and ADP respectively.

Phosphoglycerate mutase.

An enzyme involved in glycolytic pathway, it catalysed the 8th step of glycolysis.

Hexokinase- an enzyme of glycolytic pathway invloved in phosphorylation of glucose, to intiate the process of glycolysis.

Pyruvate dehydrogenase

This is an enzyme that converts pyruvate to acetyl Co-A.

therefore it plays no role in the two pathways, because glycolytic pathway ends with pyruvate production.

Explanation:

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2 years ago

Jim rode at average speed of 12 mph for 2 hours then he walked at average speed of 3 mph for 0.5 hours what was the total distan

GarryVolchara [31]

Answer:

25.5

Explanation:

im big brain sorry if not right :(

3 0

2 years ago

HELP ME FAST PLEASE!!!!

SVETLANKA909090 [29]

Think it’s answer D but it maybe B
hope this helps!!
sorry if it’s wrong

6 0

2 years ago

Which situations would be most likely to engage the anterior cingulate cortex?

maria [59]

Answer:

Which of the following situations would be most likely to engage the anterior cingulate cortex?

A waiter walks over to your table at a restaurant and holds an open menu in front of you.

You walk into the elevator of your apartment building and press the button for your floor.

You enter your classroom and find someone sitting in your usual seat.

A good friend asks you to remind him of your telephone number.

Explanation:

In order to meet the demand of the surrounding environment by adjusting the motor outputs from the brain to the environments ,a part of the emotion control part of the brain( limbic system) called the anterior cingulate cortex is responsible for this.

Anatomically, the limbic system is made up of the primarily the amygdala, hippocampus, thalamus, hypothalamus, basal ganglia and cingulate gyrus.

Based on the this its(anterior cingulate cortex) functions are formation of emotion in the limbic system, and possessing of memory and learning.

it is also a major parts of of pain networks for pain modulation and perception.

Therefore whenever there is change in the environment from the prestored condition in the brain,(e.g the usual seat in the class room occupied above) the anterior cingulate cortex adjust the motor input from the brain to adapt to the new environment to take an action,whih in this case leads to the reclaiming of the seat or any other necessary proactive action.

4 0

2 years ago