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3 years ago

The ordinary light microscope is called a bright-field microscope because _____.

Biology

2 answers:

Lapatulllka [165]3 years ago

6 0

A single light is made of

Zigmanuir [339]3 years ago

5 0

Answer:

The correct answer is option 2-the object appears dark on a light background.

Explanation:

Bright-field microscopy is the elementary or simple form of microscope used with compound microscopes. This is called a "brightfield" microscope because the specimen appears dark and contrasted in the bright light field.

For this specimen is placed on the stage of the microscope light source is then focused at the specimen. The condenser focuses the light on the specimen with the help of an aperture diaphragm. Light passes through the specimen which is collected by an objective lens which magnifies the light and transmits it to an eyepiece and to user's eyes. Some light is absorbed by dense areas, stains and pigments making specimen appear dark in bright light.

Thus, option 2-the object appears dark on a light is the correct answer.

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Answer:

B. Codon

Explanation:

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2 years ago

Based on the model presented, which of the following statements expresses the proper relationship between osmolarity, ADH releas

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Question: Based on the model presented, which of the following statements expresses the proper relationship between osmolarity, ADH release, and urine production?

(A) As tissue osmolarity rises, more ADH is released, causing less water to be excreted as urine.

(B) As tissue osmolarity rises, less ADH is released, causing less water to be excreted as urine.

(D) As tissue osmolarity rises, less ADH is released, causing more water to be excreted as urine.

Answer:

As tissue osmolarity rises, more ADH is released, causing less water to be excreted as urine.

Explanation:

ADH is the hormone that triggers the formation of concentrated urine by stimulating the absorption of water from the filtrate in the kidneys. As the solute concentration (osmolarity) in the blood raises, the more of the ADH is released into the blood. ADH triggers reabsorption of water in collecting duct and distal tubules and thereby, reduces the water loss in urine. Increased reabsorption of water restores the osmolarity, blood volume, and blood pressure.

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3 years ago

Describe four features of bacteria that enable them to survive in a wide variety of habitats

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Answer:

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Hope this helps you!!!!!! :D

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2 years ago

Read 2 more answers

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3 years ago

﻿The ordinary light microscope is called a bright-field microscope because _____.

The ordinary light microscope is called a bright-field microscope because _____.