The answer is conjunctiva. It is a mucus membrane that is responsible of covering the eye. It is comprise of stratified squamous epithelium and even stratified columnar epithelium that makes the stretchable when pulled and back to its original shape.
What will change if you permanently increase the extracellular K+ concentration? (more than one answer is possible)
a. the amplitude of action potential
b. the resting membrane potential
c. the membrane capacitance
d. the permeability of the neuron cell
e. the k+ conductance
The correct answer is option (a.) the amplitude of action potential, (b.) the resting membrane potential and (e.) the K+ conductance.
Increasing the extracellular K+ concentration will depolarize the cell, leading to a less negative resting membrane potential. This change will decrease the resting membrane potential closer to the equilibrium potential for K+. Consequently, it will also decrease the electrochemical gradient for K+ ions and reduce the driving force for K+ efflux. As a result, the K+ conductance will decrease. Finally, the amplitude of the action potential may decrease because the smaller electrochemical gradient for K+ ions will lead to a smaller K+ efflux during repolarization.
The incorrect options are:
c. The membrane capacitance: The membrane capacitance refers to the ability of the cell membrane to store charge. Increasing the extracellular K+ concentration does not directly affect membrane capacitance. Instead, it primarily affects the electrical properties of the membrane through changes in ion concentrations and permeability.
d. The permeability of the neuron cell: Increasing extracellular K+ concentration primarily affects the resting membrane potential and the electrical properties of the cell membrane, but it doesn't directly alter the permeability of the neuron cell. Permeability changes typically occur due to alterations in ion channels or membrane properties, not solely due to changes in extracellular ion concentrations.
During glacial periods, the concentration of carbon dioxide in trapped air bubbles in glacial ice is ___ when compared to the concentration during interglacial periods. lower much higher higher the same
During glacial periods, the concentration of carbon dioxide in trapped air bubbles in glacial ice is lower compared to interglacial periods. Ice core data shows a range of about 180 ppm during glacial maxima to 280 ppm during interglacials.
During glacial periods, the concentration of carbon dioxide (CO2) in trapped air bubbles in glacial ice is lower when compared to the concentration during interglacial periods. This is evidenced by ice core data which shows that CO2 concentrations varied between about 180 parts per million (ppm) during glacial maxima and 280 ppm during interglacials. The lower levels of CO2 during glacial periods are linked to cooler global temperatures and are a result of various biological and geochemical processes.
During the last Ice Age, for example, CO2 levels were below 200 ppm and average temperatures were significantly colder than today. Studies, such as those involving foraminifera and ice core records, have demonstrated a tight connection between climate and the carbon cycle, indicating that changes in atmospheric CO2 concentrations can influence global climate patterns, as well as be affected by them.
We know that fetuses can hear before birth because newborns:
HELP
Solar panels allow us to harness ___________ energy and convert it to __________ energy to heat water. chemical; thermal electromagnetic; thermal solar; chemical thermal; electromagnetic
I think it is thermal to electromagnetic
Answer: Electromagnetic and thermal
Explanation: The solar panels allows us to harness the electromagnetic energy and convert it into thermal energy which is used to heat water.
The reason it is electromagnetic energy not solar because light is a form of electromagnetic energy.
Solar panels converts energy into different forms based on the type of conversion we want.
If the gametes produced by a given organism contain 6 chromosomes, how many chromosomes are found in that organism's body cells?
What does the chloroplast do?
Professionals using electroconvulsive shock therapy (ect) for patients suffering from severe depression have shown that the memory processes of consolidation ________.
The ECT treatment includes electric stimulus used to produce a generalized seizure. Professionals using electroconvulsive shock therapy (ECT) for patients suffering from severe depression have shown that the memory processes of consolidation may take years to return.
The ____ is/are involved in the synthesis of lipids.
A mutation that causes resistance in a population of beetles is an example of _______.
a.
macroevolution
b.
microevolution
c.
migration
d.
reproduction
Recurrent epidemics and widespread diarrhea, which kill millions of children each year, result from __________.
Which of the following is an assistive bioengineered product?
a. a hip replacement
b. a pair of crutches
c. a graft of artificial skin
d. a vaccination
A tobacco plant is heterozygous for the genes for long stems (Ss), large leaves (Ll), and fibrous roots (Rr). It is crossed with another tobacco plant with genotype ss ll rr. How many of the 80 offspring of this mating will be heterozygous for all three genes? These genes are not linked. Hint: create three separate Punnett squares and use the product rule
Most connective tissue, including bone, is highly vascular. which anatomical structures in mrs. morgan's compact bone house blood vessels? what sign or symptom in mrs. morgan's case is directly related to disruption of these structures by her bone fractures? how is the sign or symptom related to these anatomical structures?
The blood vessels are both housed by the Haversian canal and the Bolkmann’s canal.
The given info that she is bleeding so abundantly only means that she has a hemorrhage. Hemorrhage is the loss of blood due to rupture walls in the blood vessels.
This sign is related to these structures since one of the canals was actually ruptured when her bone was fractured and then forced out of the skin.
According to the Doppler effect, the sound of a police car siren is and pitched as it approaches the observer.
Answer:
On the basis of the Doppler effect, the sound of a police car siren is louder and higher pitched as it move towards the observer.
Explanation:
Whenever the police car with a siren moves towards an individual, the frequency of the siren will increase and the reverse happens when the police car moves away from the person. The individual can listen to the sound of the siren louder and clearer when the car approaches the individual, as the sound is highly pitched when it moves towards the observer. This phenomenon is known as the Doppler effect.
Which of the following events represented a distribution in access to the energy source needed by an organism?
In the above study, the investigators determined that a low concentration of DNP increased the average life span from 719 days (Control) to 770 days (DNP). If the U.S. population has an average life span of 79 years, then how many years would be added if the same percentage increase were observed?
Express your answer using two significant figures.
Answer:
Increase in average life span of U.S. in terms of years is [tex]5.6\\[/tex] years
Explanation:
The controlled average life span is [tex]719\\[/tex] days
The DNP average life span is [tex]770\\[/tex] days
Increase in the average life span is
[tex]770 - 719\\= 51\\[/tex] days
Rate of increase of average life span after using DNP
(Change in life span in day [tex]/\\[/tex] Base average life span) [tex]* 100\\[/tex]
[tex]= \frac{51}{719} * 100\\= 7.09\\[/tex] %
It is given that the average life span of US people will also increase by the same rate, then the new average life span would be
Base average life span [tex]+\\[/tex] Increase in average life span
[tex]= 79 + ((\frac{7.09}{100} ) * 79)\\= 84.60\\[/tex]
So the increase in average life span of U.S. in terms of years is [tex]5.6\\[/tex] years
"________________ measures blood flow to brain areas in the active brain."
Gonadal differentiation begins at approximately what point after conception?
"as a river enters the ocean, its current diverges and slows. the first particles to settle out of suspension are relatively ________."
name two conclusions that have been drawn about harappan civilization
The Harappan civilization is known for its advanced urban planning and civil engineering, as well as the lack of political power concentration in the hands of hereditary monarchs.
Explanation:The Harappan civilization, also known as the Indus Valley Civilization, was notable for two main aspects. First, it showed a tremendous understanding of urban planning and civil engineering. This is evident from their construction of advanced drainage systems, orderly streets, and the creation of standardized bricks. These discoveries suggest that the society was well-organized and technologically advanced for its time. Second, it is believed that the Harappan civilization did not hold political power in the hands of hereditary monarchs, as was the case with many concurrent civilizations.
Indicative of this is the common culture defined by shared architectural and societal norms, suggesting a unified central authority. Additionally, despite the large size and population of this civilization, the society showed little to no war dominance or monumental architecture used to display power or influence. Instead, the civilization seemed to progress holistically, progressing technologically, artistically, and spiritually.
Learn more about Harappan Civilization at:https://brainly.com/question/6100400
#SPJ2
Imagine your forearm, hand, and fingers as a giant model of a neuron. based on this model, fingers are to dendrites as _____ is to _____. forearm; cell body hand; axon hand; cell body forearm; myelin
Answer:
Imagine your forearm, hand, and fingers as a giant model of a neuron. based on this model, fingers are to dendrites as hand is to cell body.
Explanation:
Neurons have three basic parts: the dendrites, the axon and the cell body. If we use the forearm, hand and fingers to represent this structure, we can say that the fingers would be the dendrites, the hand is the body of the cell and the forearm the axon.
Dendrites are extensions of the neuron that guarantee the reception of stimuli, leading the nerve impulse towards the cell body. The vast majority of neurons have a large amount of dendrites.
The axon is the extension that ensures the conduction of the nerve impulse. Each neuron has only one axon, which is generally longer than the dendrites.
The cell body is the site of the neuron where the nucleus is present, most of the cell organelles, and where the extensions of that cell depart.
For many people, breakfast cereal is an important source of fiber in their diets. cereals also contain potassium, a mineral shown to be associated with maintaining a healthy blood pressure. an analysis of the amount of fiber (in grams) and the potassium content (in milligrams) in servings of 77 breakfast cereals produced the regression model modifyingabove potassium with caret equals 37 plus 26 fiberpotassium=37+26fiber. if your cereal provides 88 grams of fiber per serving, how much potassium does the model estimate you will get?
Using the regression model equation potassium=37+26fiber, you can estimate the amount of potassium in a serving of cereal. You do this by substituting the amount of fiber (in this case, 88 grams) into the equation. This highlights the nutritious value of breakfast cereal.
Explanation:The question is based on the regression model equation given as potassium=37+26fiber. In this model, potassium is predicted by the amount of fiber present. The number 37 is the constant (also known as the y-intercept), and 26 is the coefficient for fiber. This means that for each additional gram of fiber, potassium increases by 26 milligrams.
To find out how much potassium you get from cereal with 88 grams of fiber, plug the value into the equation: potassium = 37 + 26*88. Solving this gives you the estimated potassium content. It demonstrates the vital role of breakfast cereal as a source of crucial nutrients and emphasizes the importance of a balanced diet.
Learn more about Prediction of Nutrient Content here:https://brainly.com/question/35164736
The _____ of an embryo differentiates into the nervous system and the skin.
What is the advantage of the rough surface lining of the intestine?
Final answer:
The rough surface of the intestine, characterized by villi and microvilli, greatly expands the surface area for digestion and absorption, slows the passage of chyme, and ensures efficient nutrient uptake into the blood and lymph vessels.
Explanation:
The advantage of the rough surface lining of the intestine, such as the villi and microvilli, is that it significantly increases the surface area available for nutrient absorption. The mucosa of the small intestine is wrinkled and covered with villi, which number about 20,000 per square inch, and each villi is topped with even finer projections called microvilli, further boosting the surface area. This anatomy allows for maximum exposure to digestive enzymes and efficient absorption of nutrients into the bloodstream.
These structures not only enhance the surface area but also slow down the passage of chyme, providing more time for digestion and absorption of nutrients. The internal structure of each villus includes a dense network of blood and lymph vessels, which transport the absorbed nutrients throughout the body. Hence, the bumpy interior of the intestines, which can be likened to a shag carpet with folds, is foundational to the digestive and absorptive functions of the small intestine.
Overall, this complex interior design allows for a staggering increase in surface area – up to 600 times compared to a smooth tube – which is crucial for effective nutrient uptake. More surface area equates to more interaction with enzymes and nutrient molecules, facilitating a more efficient and thorough absorption process.
In animals, the bulk of energy is stored as __________.
a. fatty acids
b. triacylglycerols
c. glycogen
d. waxes
e. glycerophospholipids
Final answer:
The bulk of energy in animals is stored as triacylglycerols or triglycerides, which are made of glycerol and three fatty acids, and provide long-term energy storage.
Explanation:
In animals, the bulk of energy is stored as triacylglycerols, also known as triglycerides. These molecules are the primary form of long-term energy storage in animals and consist of one glycerol molecule esterified to three fatty acids. After being made, triglycerides are stored in specialized cells called adipocytes. When energy is needed, enzymes called lipases hydrolyze the triglycerides, releasing fatty acids that can be catabolized through a process called beta-oxidation. This occurs in the mitochondria, generating two-carbon acetyl units which enter the citric acid cycle as acetyl CoA, to be ultimately used for ATP production. Glycerol, on the other hand, can be phosphorylated and enter glycolysis to further contribute to cellular energy supply.
List two functions of territory in the animal kingdom and provide one example of how territory in human culture is different.
What structures connect each spinal nerve to the spinal cord?
In cell f7, create a formula that calculates the salary for joan dickinson. her salary is calculated by adding her base salary (cell b7) to her total bonus (cell e7). (hint: do not use the sum function.)
Blood glucose levels are regulated by secretions of ________ by the pancreas.
a. orexin
b. insulin
c. leptin
d. pyy
_________, a common mineral found in igneous rocks, is the most abundant mineral in detrital sedimentary rocks.