Oily or fatty substances that prevent moisture loss from the skin are sebum, containing lipids and fatty acids, natural esters in fats and oils acting as a barrier, and unsaturated fats or oils rich in unsaturated fatty acids.
Explanation:Oily or fatty ingredients that prevent moisture from leaving the skin are sebum, which is produced by sebaceous glands in the skin. Sebum is composed of lipids and fatty acids that create a barrier on the skin's surface to prevent water loss and inhibit microbial growth. Furthermore, on the skin's surface, the fatty acids create a dry, salty, and acidic environment that is resistant to breakdown by enzymes.
Moreover, substances like esters form the essential ingredients of natural fats and oils. They are the result of the reaction between carboxylic acids (such as palmitic acid, stearic acid, and oleic acid) and trihydroxyl alcohol, glycerine. Esters are also found in oily substances that provide a barrier that prevents the skin from losing moisture.
Lastly, unsaturated fats or oils, rich in unsaturated fatty acids, commonly found in plant origin, also play a significant role in retaining moisture in the skin. Known examples are olive oil, corn oil, and canola oil, which are liquid at room temperature due to the bend or 'kink' in their fatty acid chains which prevents tight packaging.
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__________ is needed in the body to make vitamin d, bile acids, and cortisol.
Final answer:
Cholesterol is essential for producing vitamin D, bile acids, and cortisol. It is synthesized in the liver and converted to vitamin D in the skin upon UV exposure. It is also necessary for the formation of bile salts that aid in fat absorption and is a critical component of cellular membranes.
Explanation:
Cholesterol is needed in the body to make vitamin D, bile acids, and cortisol. This steroid is synthesized by the liver and is a crucial precursor for many hormones, including testosterone and estradiol. It plays a significant role in the synthesis of vitamin D by serving as the starting material for the compound's production in the skin upon exposure to ultraviolet radiation. Furthermore, cholesterol is the starting point for the formation of bile salts necessary for the emulsification of fats, allowing for their absorption by cells.
Despite its bad reputation, cholesterol is essential for the body's proper functioning, serving as a component of cell membranes. Vitamin D synthesis begins in the skin where cholesterol is converted to cholecalciferol by UV radiation. It is then metabolized in the liver and kidneys to its active form, which is vital for calcium and phosphorus homeostasis and bone health.
Moreover, vitamin D, synthesized by the skin, aids the immune system by enhancing the absorption of calcium critical for healthy bones and cellular functions. This synthesis is a cooperative effort between the skin and digestive system, reflecting the interplay between various body systems to maintain homeostasis and ensure proper immune responses.
Which food is at a temperature that allows bacteria to grow fastest servsafe?
The temperature in food that makes bacteria to grow faster is called the danger zone in which it has a temperature of 40 degrees Fahrenheit up until one hundred forty degrees Fahrenheit. Within twenty minutes with the exposure of this temperature, it has the ability to double the numbers of the bacterial growth in the food.
what type of barrier are coughing and sneezing?
After the release of the mature egg, it is guided by the fimbria into the
___________ is the branch of biology that names and classifies species.
What structural modifications of the proximal convoluted tubule cells enhance their ability to reabsorb substances?
The proximal convoluted tubule cells have a brush border of microvilli to increase surface area and high mitochondria concentration for ATP production, aiding in efficient reabsorption of substances. Tight junctions between cells also allow selective reabsorption. These structural modifications enhance their ability to reabsorb ions, nutrients, and water.
The proximal convoluted tubule (PCT) cells have several structural modifications that enhance their ability to reabsorb substances efficiently. One key feature is the presence of a brush border on the luminal surface, which is composed of numerous microvilli. These microvilli significantly increase the surface area, allowing for maximal reabsorption of ions, nutrients, and water. Additionally, the cells of the PCT possess a high concentration of mitochondria to supply the necessary ATP for active transport processes. Tight junctions between these cells permit selective reabsorption while maintaining a barrier that controls the paracellular movement of small ions.Which operant conditioning process must researchers use to encourage closer and closer approximations of a target behavior? A. stimulus generalization B. acquisition C. extinction D. shaping
The correct answer is D. Shaping.
Target behaviour is termed as the behavior which is being identified to change the behaviour which is prescribed.
The behaviour can be identified by topography or by function.
There are different types of behaviours, for example,
1. Agressive- the act of anger which is unplanned tends to hurt something or someone.
2. Assertive.
3. Passive.
4. Passive-aggressive.
The basic kind of behaviour is operant behaviour because it acts or operates in an environment. The other one is consequence influence.
n which structure of the female reproductive system are eggs produced? cervix fallopian tube ovary uterus
The ovary is the reproductive organ that helps in the production of an egg.
Further explanation:
The female reproductive system performs several functions. It produces egg cells that are required for the survival of human species. The ova are produced for the fertilization that occurs in the fallopian tubes. The egg is released by the process called ovulation from the ovaries. The fusion of egg and sperm takes place in the fallopian tube, which is than implant in the uterus wall till the next steps or further stages of pregnancy take place. It also helps in the production of several hormones. It is called female sex hormones that are required to maintain the pregnancy.
This system consists of a pair of ovaries, oviducts, vagina, cervix, and uterus. It resides in the pelvic part of the female body. Ovaries (female sex organ) are present on each side of the abdominal cavity. It is about two to four centimeters in length and is connected to the uterus through ligaments. They are divided into two parts, the outer cortex and the inner medulla. The outer cortex contains several ovarian follicles, which are the basic unit of female sex organs. The inner medulla is a highly vascular stroma. It contains embryonic mesenchyme, blood vessel, nerves and lymphatic vessels that are required for the growth of a follicle.
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1. Learn more about meiosis https://brainly.com/question/1600165
2. Learn more about the process of molecular diffusion in a cell https://brainly.com/question/1600165
3. Learn more about human sperm and egg cell https://brainly.com/question/1626319
Answer Details:
Grade: High School
Subjects: Biology
Chapter: Reproduction
Keywords:
Reproductive system, egg, survival, ovulation, fallopian tube, pregnancy, hormones, ovaries, medulla, cortex, uterus, follicles, stroma, mesenchyme, lymphatic, vagina, cervix.
Phytoplankton are plantlike microorganisms that live on the water's surface in aquatic biomes. As photosynthesis organisms, phytoplanton produce much of Earth's oxygen as a byproduct. Explain the ecological impact of a decline in phytoplankton by providing examples from the organism through the ecosystem levels of organism.
A nurse is assessing the needs of a client who just learned that a tumor is malignant and has metastasized to several organs and that the illness is terminal. what behavior does the nurse expect the client to exhibit during the initial stage of grieving?
How could an embryonic stem cell be used to repair a severed spine?
Sensory neurons have a resting potential based on the efflux of potassium ions (as demonstrated in activity 1). what passive channels are likely found in the membrane of the olfactory receptor, in the membrane of the pacinian corpuscle, and in themembrane of the free nerve ending?
The types of passive channels found in these sensory neurons include sodium and potassium ion channels. The olfactory receptor uses sodium channels triggered by odorant molecules, the Pacinian corpuscle employs mechanosensitive ion channels, and free nerve endings utilize ion channels sensitive to temperature and chemicals.
Explanation:The passive channels likely found in the membranes of the olfactory receptor, Pacinian corpuscle, and free nerve ending are predominantly ion channels that are selective for sodium and potassium ions. These ion channels include leakage channels, which are always open and allow ions to move according to their concentration gradient; and gated channels, which open or close in response to certain stimuli.
In the olfactory receptor, a special type of sodium channel is utilized that opens upon the binding of an odorant molecule. For the Pacinian corpuscle, which is sensitive to vibration and pressure, mechanosensitive ion channels are used that open in response to physical distortion of the cell membrane. Lastly, for free nerve endings, which are involved in pain perception, temperature-sensitive ion channels (like the TRPV1 channel) and ion channels responsive to chemicals (like the ASIC channels for acid sensing) are utilized.
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Which type of lipoprotein takes cholesterol from cells or atherosclerotic deposits back to the liver? very low density lipoproteins (vldls) low density lipoproteins (ldls) intermediate density lipoproteins (idls) high density lipoproteins (hdls)?
Functions of the smooth endoplasmic reticulum include ______. 1
The smooth endoplasmic reticulum (SER) has key functions including lipid synthesis and detoxification. It is also involved in carbohydrate metabolism, steroid hormone production, and calcium regulation.
Explanation:The smooth endoplasmic reticulum (SER) serves many key functions within cells. Two important roles are lipid synthesis and detoxification. Lipids, or fats, are essential for cell membrane structure and function, and SER is the site where many of these lipids are synthesized. Additionally, the SER plays a crucial role in detoxifying certain drugs and toxins in the body, rendering them less harmful or even harmless. Other functions of the SER include the metabolism of carbohydrates, steroid hormone production, and regulation of calcium concentration, among others.
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Heme iron is absorbed better than non-heme iron.
a. True
b. False
What are the functions of mitosis in a multicellular eukaryotic organism such as plants and animals?
Glucose + glucose —> _____ by _____. glucose + glucose —> _____ by _____. cellulose + water ... hydrolysis maltose + water ... dehydration synthesis starch + water ... dehydration synthesis lactose + water ... hydrolysis sucrose + water ... dehydration synthesis
Glucose and glucose can form maltose through dehydration synthesis, while cellulose can be broken down into glucose through hydrolysis. Sucrose can also be formed through a condensation reaction, and glucose and galactose combine to form lactose.
Explanation:In biology, glucose and glucose can be combined through a dehydration synthesis reaction, which forms maltose and a water molecule. Conversely, cellulose can be broken down into glucose and water through a hydrolysis reaction. Additionally, other reactions involving glucose include the formation of sucrose through condensation reaction and the formation of lactose through the combination of glucose and galactose.
The inflammatory response increases the temperature of a skin cell above its normal range. This prevents the cell from quickly performing certain enzyme-catalyzed reactions. Why would this occur?
High temperatures denature the enzyme, slowing the reaction.
High temperatures denature the substrate, slowing the reaction.
High temperatures denature the enzyme, ending the reaction.
High temperatures denature the substrate, ending the reaction.
Answer:
As the temperature of a skin cell increases it causes denaturation of enzymes thereby slowing the reaction.
Explanation:
Enzyme activity is affected by change in temperature. All enzymes are protein in nature and with increase in temperature it causes denaturation of protein structure. If the protein denatures it results in loss of active sites where the substrate molecules must bind to get converted to product. During denaturation the tertiary and secondary structure of proteins is lost.
As we know that the role of enzymes is to increase the reaction rates, so in the absence of enzymes the reaction rate will be slowed down but doesn't ends the reaction.
Rory is trying to identify a tree from one of its leaves. A question on the dichotomous key that he is using asks whether the leaf has 3-5 lobes or more than 5 lobes. Rory cannot tell whether the leaf in his hand has 5 or 6 lobes. What should Rory do to continue identifying the tree?
Look at other leaves from the same tree, and count how many lobes they have.
Skip this question, since one question does not make a difference.
Start over from the beginning of the dichotomous key.
Find a different dichotomous key to use that does not ask this question.
The answer would be:
Look at other leaves from the same tree, and count how many lobes they have.
If you'd like to know why, read on:
A dichotomous key helps identify an organism based on observable traits. One option leads to another question, which would be more specific based on the choice made before it, so skipping it would not be a good option. Even if you start over from the beginning of the dichotomous key, you will end up with the same question because you are examining the same thing.
Looking at the other leaves is the best choice because the other leaves are part of the organism you are observing, so it would be the same thing.
The most common type of leukocyte is a/an __________.
You are watching your favorite television program and you see a commercial for a new medication. it states that the medication can alleviate depression. "since depression is a chemical imbalance, new venlafaxine extended release can help with mood, sleep, arousal, and alertness by working on the two key neurotransmitters involved in depression." these two neurotransmitters are serotonin and _____.
Final answer:
The other key neurotransmitter involved in depression, alongside serotonin, that the medication venlafaxine extended release works on is norepinephrine. As an SNRI, it helps increase the presence of these neurotransmitters in the brain, which can improve symptoms of depression.
Explanation:
In the given medication advertisement for a new antidepressant, it states that the medication works on two key neurotransmitters involved in depression. The neurotransmitters responsible for mood, sleep, arousal, and alertness are serotonin and norepinephrine. Antidepressant medications, particularly serotonin and norepinephrine reuptake inhibitors (SNRIs), are designed to improve these neurological functions by increasing the availability of these neurotransmitters in the brain. The increased presence of norepinephrine alongside serotonin in the synaptic cleft is believed to contribute to the alleviation of depressive symptoms.
A trait has two alleles, which are represented by p and q. If p = 0.44, what is q?
Answer:
.56
Explanation:
A P E X
Tara is in her final month of pregnancy. she is writing a birth plan and would like to know how the use of epidural analgesia might impact her baby. you can tell tara that exposed newborns tend to
Which statement about soil color is true?
a-Soils vary in color based on their depth.
b-Soils do not vary in color based on their depth.
c-Soils close to Earth's surface are always darker.
d-Soils far from Earth's surface are always darker.
The statement that is true about soil color is a-Soils vary in color based on their depth.
Whst is a soil?Soil is the upper or top mostvlayer of the earth that support existence of plants and are use for various things by man.
They are use for construction, buildings and many more.
Therefore, The statement that is true about soil color is a-Soils vary in color based on their depth.
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Which describes a function of the pons? controls several autonomic body functions secretes many of the body's hormones controls blood flow and consciousness relays information to the cerebrum?
Which of the following best describes computer modeling in biology?
a.A computer is used to create a spreadsheet showing the relationship of the algae population in a lake to the nitrate pollution
b.A computer is used to simulate the growth of algae in a lake due to increasing nitrate pollution.
c.A computer is used to calculate a scale of a lake’s turbidity due to algal growth from too much nitrate pollution in the water.
d.A computer is used to store data and create a database of the changing algae populations in a lake due to nitrate pollution.
Answer:
The answer is B
Explanation:
A computer model is mostly used for simulations. In other words, the computer program can generate scenarios showing the response of the organisms under study when we enter variations in the conditions such as temperature, salinity and rainfall or variations in resources, such as prey type or availability of nesting sites or nutrients.
While performing high-quality cpr on an adult, what action should you ensure is being accomplished?
The right answer is Call the emergency number (like 911 in USA).
If you have to make a single gesture it must be that one! They are well organized and relatively fast, but without warning them, there will be no help!
Things you have to say in the call:
* Describe the situation quickly.
* Give the number of victims.
* Give the apparent state of the victim.
* Specify if you did something and if you need the font).
* Give the address of the place.
What purple-flowered spice is often used in making soaps and potpourri?
Which definition is the best for “semipermeable membrane”? It is a barrier that prevents materials from moving from one side to the other. It is a barrier that allows materials to move freely from one side to the other. It is a barrier with tiny openings that let some, but not all, materials pass through. It is a barrier that helps materials move from one side to the other.
Answer:
Option C, It is a barrier with tiny openings that let some, but not all, materials pass through
Explanation:
A semipermeable membrane is a biological membrane that allows some substances to pass through it. Such type of membranes are also referred as selectively permeable membrane as they do not allow all substances to pass through it non-distinctively.
For example the cell membrane , wall of arteries, wall of intestine etc. are semipermeable membrane.
Hence, option C is correct.
Describe one way that this event would affect the biosphere or the geosphere.