What is the difference between a price of expository writing and a narrative

Yuki888 [10]

Answer:

1A. Differential Staining is a staining process which uses more than one chemical stain. Using multiple stains can better differentiate between different microorganisms or structures/cellular components of a single organism.

2. Unlike negative staining, positive staining uses basic dyes to color the specimen against a bright background. ... The negatively charged cell wall of many microorganisms attracts the positively charged chromophore which causes the specimen to absorb the stain giving it the color of the stain being used.

3. Gram-staining is a differential staining technique that uses a primary stain and a secondary counterstain to distinguish between gram-positive and gram-negative bacteria. Stains cells purple or blue. mordant, makes the dye less soluble so it adheres to cell walls.

4. The process involves three steps:

Cells are stained with crystal violet dye. ...

A decolorizer such as ethyl alcohol or acetone is added to the sample, which dehydrates the peptidoglycan layer, shrinking and tightening it. ...

A counterstain, such as the weakly water soluble safranin, is added to the sample, staining it red.

5. Heat fixing denatures bacterial enzymes, preventing them from digesting cell parts, which causes the cell to break, a process called autolysis. The heat also enhances the adherence of bacterial cells to the slide. It removes water from the bacterial cell, pores open in the cell so more stain can enter the cell wall.

6. To measure an object seen in a microscope, an ocular micrometer serves as a scale or rule. This is simply a disc of glass upon which equally spaced divisions are etched. ... To use the ocular micrometer, calibrate it against a fixed and known ruler, the stage micrometer.

Explanation:

8 0

3 years ago

Imagine that a researcher is studying a population of nerve cells known as the neural crest. In mice, when these cells fail to f

Svetlanka [38]

<h2>Neural crest </h2>

Explanation:

The neural crest likely forms: neurons and glia of the peripheral nervous system

The neural crest are bilaterally paired strips of cells arising in the ectoderm at the margins of the neural tube
In the body region, neural crest cells also contribute the peripheral nervous system (both neurons and glia) consisting of sensory ganglia (dorsal root ganglia), sympathetic and parasympathetic ganglia and neural plexuses within specific tissues/organs
The nervous system is made up of specialized cells which includes nerve cells (or neurons) and glial cells (or glia)
Neurons are the basic functional units of the nervous system, and they generate electrical signals called action potentials, which allow them to quickly transmit information over long distances
Glia are also essential to nervous system function, but they work mostly by supporting the neurons

7 0

3 years ago

The relationship between the remora and the shark is an example of - (5.5)

Wewaii [24]

D.mutualism,both parties benefit

6 0

3 years ago

Read 2 more answers

Which gland produces T3 and T4?

Leokris [45]

Answer:

1. The gland that produces T3 and T4 is the thyroid (first option).

2. True. The adrenal gland produces and allows the secretion of the hormone involved in the fight and flight response.

3.The symptom that is not correctly matched with the organ system is joint pain, which is related to the joint system, not the skeletal system.

4. False. Negative feedback loop inhibits the production and release of hormones.The symptom that is not correctly matched with the organ system is Joint pain - skeletal system

Explanation:

1. Thyroid gland is a small organ of no more than 30 grams found in the neck, in front of the trachea. This gland produces thyroglobulin, which when joined with iodine can synthesize triiodoythyronine (T3) or thyroxine (T4).

The main function of the thyroid gland is the regulation of organic metabolism, while it can also mediate the body's response to other hormones.

2. Adrenal gland is located in the upper pole of each kidney and is responsible for the secretion of several substances that help with the body's activity.

In the gland's marrow, a substance called adenaline is produced, with properties such as hormone and neurotransmitter, one of the main substances produced to deal with stress and the adaptation response called fight and flight.

The adrenaline produced in the adrenal medulla can strengthen muscles, increase heart rate and blood pressure, and increase the body's resistance to the presence of stressors or threats to physical integrity.

3. Joint pain is related to inflammation of the joint soft tissues, which belong to the joint system. Unlike joint pain, bone pain occurs as a result of injury to the periosteum -the thin membrane that covers the bones- which is related to the skeletal system.

Painful inflammation of the joints is called arthritis, and is one of the main causes of disability to perform normal body movements.

4. Feedback is a control mechanism of the endocrine system. Negative feedback loop occurs in response to a stimulus, resulting in the inhibition of mechanisms that promote the synthesis and release of substances.

An example of negative feedback is the sufficient production of thyroid hormones, which sends a signal to the hypothalamus, which in turn inhibits the production of TSH - thyroid stimulating hormone - at the level of the pituitary gland. If the pituitary does not release TSH, production of thyroid hormones ceases.

Learn more:

Thyroid feedback loop brainly.com/question/4967372

4 0

3 years ago

Plants use the sugars they produce during photosynthesis to create which molecule

myrzilka [38]

Answer:

sugar molecule

Explanation:

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

6 0

4 years ago