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Ne4ueva [31]
2 years ago
11

How to assess sperm vitality?​

Medicine
1 answer:
FinnZ [79.3K]2 years ago
6 0
Evaluate at least 200 spermatozoa, tally the numbers of live and dead spermatozoa using a laboratory counter, and calculate the percentage of live spermatozoa (see Note 10). The lower reference limit for vitality assessed by eosin–nigrosin stain (membrane-intact spermatozoa) is 58% (5th percentile, 95% CI 55–63) (1).
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1. How do your eyes work? What is the difference between focal vision and peripheral vision?
Olin [163]

Answer:

1 When light hits the retina (a light-sensitive layer of tissue at the back of the eye), special cells called photo receptors turn the light into electrical signals.

These electrical signals travel from the retina through the optic nerve to the brain. Then the brain turns the signals into the images you see.Focal vision is involved in examining and recognizing objects related with the macular area of the retina whereas peripheral vision is vision resulting in stimulation of the retina outside the macula. An example of peripheral vision would be looking straight ahead while also being able to see on the side by the eye.

Explanation:

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Have a nice day

And if u want to be nice you can mark me brainest

7 0
2 years ago
Which of the following medications have no primary effect on heart rate, but can lower blood pressure
Sergeeva-Olga [200]

Calcium channel blocker

These medications lower blood pressure and treat other conditions such as chest pain and an irregular heartbeat.

<h3>What are Calcium channel blocker ?</h3>

Calcium channel blockers are medications used to lower blood pressure. They work by preventing calcium from entering the cells of the heart and arteries.

  • Calcium causes the heart and arteries to squeeze (contract) more strongly. By blocking calcium, calcium channel blockers allow blood vessels to relax and open.

  • The medications may also be prescribed to relieve chest pain (angina) and control an irregular heartbeat.

  • Calcium channel blockers are also called calcium antagonists.

Learn more about Calcium channel blocker here:

brainly.com/question/15185106

#SPJ4

5 0
1 year ago
What should be lewis immediate concern and action on hearing the emergency tornado and warning announcement?
Scrat [10]

The correct answer to this open question is the following.

Unfortunately, you did not include any text, context, article, or any other useful reference to know who is Lewis and his context.

However, we can help you to answer in general terms.

When hearing the emergency tornado and warning announcement, you immediately have to take the proper actions included in your emergency plan.

According to the Occupational Safety and Health Administration (OSHA), it is highly recommended that people and businesses previously develop an emergency plan in ca of a tornado.  This way, when a situation like this happens, yo have already know the proper steps to take with calm, instead of panicking for the emergency.

One of the most important things of the plan is to include a place to shelter during the tornado. So you elaborate a risk assessment, prepare a shelter, have enough food and water to spend a couple of days in there, evacuate your home or workplace on time, and lockdown.

8 0
3 years ago
True or False
Artyom0805 [142]

Answer:

True, Long term facilities do in fact assist in those factors. Hence the term: Long Term facilities

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Many experts recommend a level between 20 and 40 ng/mL. Others recommend a level between 30 and 50 ng/mL.
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