can someone answer this pls??

Tongue

The four intrinsic tongue muscles work together to give the tongue great flexibility.

The nervous system must receive and process information about the world outside in order to react, communicate, and keep the body healthy and safe. Much of this information comes through the sensory organs: the eyes, ears, nose, tongue, and skin. Specialized cells and tissues within these organs receive raw stimuli and translate them into signals the nervous system can use. Nerves relay the signals to the brain, which interprets them as sight (vision), sound (hearing), smell (olfaction), taste (gustation), and touch (tactile perception).

1. The Eyes Translate Light into Image Signals for the Brain to Process

The eyes sit in the orbits of the skull, protected by bone and fat. The white part of the eye is the sclera. It protects interior structures and surrounds a circular portal formed by the cornea, iris, and pupil. The cornea is transparent to allow light to enter the eye, and curved to direct it through the pupil behind it. The pupil is actually an opening in the colored disk of the iris. The iris dilates or constricts, adjusting how much light passes through the pupil and onto the lens. The curved lens then focuses the image onto the retina, the eye’s interior layer. The retina is a delicate membrane of nervous tissue containing photoreceptor cells. These cells, the rods and cones, translate light into nervous signals. The optic nerve carries the signals from the eye to the brain, which interprets them to form visual images.

2. The Ear Uses Bones and Fluid to Transform Sound Waves into Sound Signals

Music, laughter, car honks — all reach the ears as sound waves in the air. The outer ear funnels the waves down the ear canal (the external acoustic meatus) to the tympanic membrane (the “ear drum”). The sound waves beat against the tympanic membrane, creating mechanical vibrations in the membrane. The tympanic membrane transfers these vibrations to three small bones, known as auditory ossicles, found in the air-filled cavity of the middle ear. These bones – the malleus, incus, and stapes – carry the vibrations and knock against the opening to the inner ear. The inner ear consists of fluid-filled canals, including the spiral-shaped cochlea. As the ossicles pound away, specialized hair cells in the cochlea detect pressure waves in the fluid. They activate nervous receptors, sending signals through the cochlear nerve toward the brain, which interprets the signals as sounds.

3. Specialized Receptors in the Skin Send Touch Signals to the Brain

Skin consists of three major tissue layers: the outer epidermis, middle dermis, and inner hypodermis. Specialized receptor cells within these layers detect tactile sensations and relay signals through peripheral nerves toward the brain. The presence and location of the different types of receptors make certain body parts more sensitive. Merkel cells, for example, are found in the lower epidermis of lips, hands, and external genitalia. Meissner corpuscles are found in the upper dermis of hairless skin — fingertips, nipples, the soles of the feet. Both of these receptors detect touch, pressure, and vibration. Other touch receptors include Pacinian corpuscles, which also register pressure and vibration, and the free endings of specialized nerves that feel pain, itch, and tickle.

4. Olfaction: Chemicals in the Air Stimulate Signals the Brain Interprets as Smells

The sense of smell is called olfaction. It starts with specialized nerve receptors located on hairlike cilia in the epithelium at the top of the nasal cavity. When we sniff or inhale through the nose, some chemicals in the air bind to these receptors. That triggers a signal that travels up a nerve fiber, through the epithelium and the skull bone above, to the olfactory bulbs. The olfactory bulbs contain neuron cell bodies that transmit information along the cranial nerves, which are extensions of the olfactory bulbs. They send the signal down the olfactory nerves, toward the olfactory area of the cerebral cortex.

5. Home of the Taste Buds: The Tongue Is the Principal Organ of Gustation

What are all those small bumps on the top of the tongue? They’re called papillae. Many of them, including circumvallate papillae and fungiform papillae, contain taste buds. When we eat, chemicals from food enter the papillae and reach the taste buds. These chemicals (or tastants) stimulate specialized gustatory cells inside the taste buds, activating nervous receptors. The receptors send signals to fibers of the facial, glossopharyngeal, and vagus nerves. Those nerves carry the signals to the medulla oblongata, which relays them to the thalamus and cerebral cortex of the brain.

Answer:

The motion of a mouse

Explanation:

Ik This is for A-P-3-X

Keep on cheating guys whatever it takes to pass :)

Answer:

Hmmm.....firstly it depends which grade ur in....well in general I am ready

Answer:

Carbon can be stored in the ocean as carbon acid

Answer:

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Explanation:

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Answer:

i think so because of co

vid-19

Answer:

Yes it is. I know this because it talks about the last day's in the bible.

"But know this, that in the last days critical times hard to deal with will be here.  For men will be lovers of themselves, lovers of money, boastful, haughty, blasphemers, disobedient to parents, unthankful, disloyal,  having no natural affection, not open to any agreement, slanderers, without self-control, fierce, without love of goodness,  betrayers, headstrong, puffed up with pride, lovers of pleasures rather than lovers of God,  having an appearance of godliness but proving false to its power; and from these turn away."

-2 Timothy 3:1-5

Explanation:

Answer:

are those the answer choice?

Explanation:

Answer: a and b

Explanation: i think this is the answer i hop this is helful

Answer:

deoxyribose

Explanation:

A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

I hope that this helped you ;)

Answer: D

Explanation:

Crossing over refers to homologous chrosmomes exchanging DNA which creates variation of chromsoomes that are inheried by offspring.

Answer:      tomato is not a adiotic

Explanation:

Answer:

They become more expressed and prominent, because of natural selection.

The bacterial DNA can be found in the cytoplasm.

Hope this helps

I can't see the picture soo I don't understand what your question 8s

Answer:

Waxing Quarter

Explanation:

Answer:

It ruins your hearing a bit.

Explanation:

Your hearing gets ruined by the loud beats coming from the sound, making your ear drums bounce and hurt a bit, making your hearing weaker

Answer:

I believe its A, C, and D

Explanation:

In order:

electrons

electrons

protons

4

3

3

The amount electrons and protons balance out their charges, leading the charge to be 0

This answer depends on what you learned in class:

They discovered the presence of neutrons after experimenting.

or

They realized that these neutrons had to exist to make a stable nuclei and balance out the mass.

(both answers are correct, so you can combine them if you want)

Answer:The promoter is found in the DNA of the operon, upstream of (before) the genes. ... Some regulatory proteins are repressors that bind to pieces of DNA called operators. When bound to its operator, a repressor reduces transcription (e.g., by blocking RNA polymerase from moving forward on the DNA).

Explanation:

Answer:

In translocation, a piece of chromosome or a whole chromosome breaks off during meiosis and attaches itself to another chromosome. The presence of an extra part of the number 21 chromosome causes the features of Down syndrome.

Answer:

Skin, Liver and Blood are infected.

Answer:

transportation

Explanation:

Transportation (28.2 percent of 2018 greenhouse gas emissions) – The transportation sector generates the largest share of greenhouse gas emissions.

hope this help

Answer:

Transportation

Explanation:

...............

Answer:

General Characteristics of the Desert:

Aridity: It is one and common characteristic of all deserts throughout most or all of the year. ...

Extremes of temperature: ...

Humidity: ...

Precipitation: ...

Drought: ...

High wind velocity.

Sparsity of cloud cover.

Absence of water vapour in air.

Bedford a cell divides, it makes a copy of its genes during interphase

Answer:

the first one is mitosis

and the second one is meiosis

Answer:

Diploid cells: Mitosis

Haploid Cells: Meiosis