Answer: The visceral membrane is a type of serous membrane, which covers the outer layer of organs (such as the intestines). It secretes small amounts of a serous fluid, which reduces friction between organs and other structures.
All cells have a membrane that distinguishes their internal contents from the surrounding fluid or tissue.
Remember, smaller entities such as virus or prions are not cells, but rather just protein complexes.
Answer: It is located around the nucleus. It is also called the nuclear envelope. If you do not find it as nuclear membrane try looking for it as nuclear envelope, perinuclear envelope, nucleolemma, or karyotheco.these are all the same. and they are located around that nucleus.
Answer: The serous membrane contains the epithelial layer and the connective tissue layer.
The epithelial layer produces cells that produce lubricating serious fluid. The Connective tissue later houses blood vessels and nerves and serves as the "binding layer" for the serous membrane to adhere to organs and other structures in the body.
Answer: The answer to this question includes a number of complex variables. The following is a thumbnail sketch of the variables.
A hearing loss means that at any given frequency (think pitch, like a note on the piano) you need more sound pressure (think volume) than someone with good hearing. You require a louder sound before the inner ear can send a noticeable signal to the brain.Audiometric Scale. The numbers you provided, 72 dB to 90 db, are numbers from an audiogram. The audiogram is a graph or chart that records your response to sound presented to the ear. This sound is presented in frequencies (notes) typically starting at 500 Hz. You are then tested in the following frequencies 1K, 2K, 3K, 4K and 6K. That is a basic sequence often followed. A more thorough test will start at 125 Hz and go all the way to 8K, testing each octave and some ½ octaves along the way. Zero on this scale is not an absolute number; it does not mean there is no sound being presented. It is a number derived from an average of many thousands of tests. It is the softest level at which someone with perfectly good hearing can hear a given frequency. If your hearing level is higher than zero, say 10 dB, 40 dB, 70 dB, then, this is the additional amount of energy your ear needs to hear a sound. It is the additional amount over someone with very good hearing. The audiometric scale ranges from -15 dB to about 140 dB, the point at which your ears are likely to start bleeding. Anything above 85-90 dB, over a given period can be harmful to your hearing. The louder the sound the lower the time exposure before damage occurs.Frequency Trivia. 250 Hz is approximately middle "C" on the piano. 4K is the high note on the piano. 29 Hz is the low note.The audiometric scale does not tell you how much speech understanding you have. It only tells you the sound pressure level needed in order for you ear to send a signal to the brain. The brain needs more energy and much more information than that to understand speech. The audiogram only gives us a general idea of how difficult it is for a person to hear a sound. Included in this series of the tests we also conduct "Bone Conduction" tests and frequency specific LDLs. (tonal loudness discomfort levels).SRT, Speech Reception Threshold.This is the first in a series of speech tests that we give to help determine the answer to the question "how much am I hearing". When someone asks, "how much hearing do I have?" They typically are wonder how much of the conversation are they getting, or missing? The SRT gives us the level at which sound is loud enough for you to begin understanding words. A typical SRT for someone with excellent hearing is as low as 5 dB. A typical SRT for anyone over the age of 40 is about 15-25. An SRT range that we would normally expect to see for someone with a 70 dB to 90 dB loss will run from 70 to 105. That is a wide range because it is dependent of the actual damage present in the cochlea (inner ear). The SRT range depends on more than just the SPL presented. Speech understand also depends on more than just the SPL (sound pressure level, think "volume"). Speech understanding depends on the coordinated function of thousands (approx 30,000) of nerve endings we call hair cells, in the inner ear. Of course it also depends on the entire nerve path and the respective brain areas. But in the vast majority of hearing losses (say 90%) the problem is in the inner ear. The speech reception testing sequence also includes tests for the MCL (most comfortable level) and the LDL or UCL (loudness discomfort or Uncomfortable levels)The next phase of testing will more directly assess your speech understanding. This portion of the testing sequence includes the tests we call "Discrimination testing". It also includes "Speech In Noise" testing and "Master Hearing Aid" testing.In summary the 70 to 90 dB loss provides only a small glimpse of a persons hearing function. With those two numbers, I do not know which frequencies were tested. For instance if this loss occurs at 6k Hz and 8k Hz (a common occurrence) the patient being tested might show 80% or better speech understanding. On the other hand if the loss is a flat loss starting at 70 dB (at 250 Hz) and declining to 90 dB (at 6k Hz) then the persons speech understanding could be 30% or lower. Of course speech understanding cannot be derived from the audiogram. It requires actual speech discrimination testing. True I can make a fairly educated and experienced guess, but a wide range of answers is possible.
Answer: A hearing aid will not accelerate your hearing loss or improve the underlying condition. You hearing loss could progress due to age, genetics, noise or medications but not the hearing aid. Ok but does using an aid have any effect on further loss in other words if not using an aid does a condition deteriorate quicker than if wearing one?
Answer: It depends: If there was only trauma, as in built up pressure when the ear was hit, then the eardrum was injured, and that may be temporary. If there was fluid coming out of the ear at the time, then the eardrum was ruptured and this may cause permanent hearing loss. There may be an operation to fix this, but only the doctor will be able to say for sure.
Answer: You can request it, but your request will most likely be denied. The other party must be served with the contempt action and must be given ample opportunity to review and to prepare to respond before any hearing.
Answer: The nucleus is surrounded by a nuclear envelope composed of two membranes. The nuclear envelope is dotted with thousands of nuclear pores, which allow material to move into and out of the nucleus. Like messages, instructions, and blueprints moving in and out of a main office, a steady stream of proteins, RNA, and other molecules move through the nuclear pores to and from the rest of the cell. --Biology textbook
Answer: A mucous membrane is a layer of epithelial tissue which lines an area of the body which comes into contact with air. Mucous membranes are moist because of the presence of glands which secrete a thick fluid known as mucus, and they are important for a number of bodily functions. Mucous membranes line the urogenital tract, digestive tract, and respiratory tract, with one of the more well known mucous membranes being the lining of the interior of the nose.
The moisture found in a mucous membrane acts to protect the body by creating a barrier and preventing the inside of the body from drying out. Mucus also traps pathogens, dirt, and particulate matter so that they can be sequestered and eliminated by the body. The nose is particularly famous for this, using mucus as a barrier between many harmful substances and the respiratory tract. Some sections of mucous membrane also have small hairs known as cilia which act as traps, and can move to push things across the surface of the membrane.