The rise in blood glucose levels after eating stimulates the pancreas to secrete the hormone ___, causing blood glucose levels to ____.
What structures of the cytoskeleton are found in animal cells but not in plant cells?
Which of these statements is true with regard to this animation? which of these statements is true with regard to this animation? sodium and potassium ions are transported against their concentration gradients. the cell is not expending energy. sodium ions are transported down their concentration gradient. potassium ions are transported down their concentration gradient. the cell does not expend atp?
Final answer:
Sodium and potassium ions are actively transported against their concentration gradients by the sodium-potassium pump, a process that requires ATP, thus the cell expends energy.
Explanation:
The statement true with regard to the animation of the sodium-potassium pump is that sodium and potassium ions are transported against their concentration gradients. This process is an example of active transport and indeed requires energy in the form of ATP. This mechanism is crucial for maintaining the electrochemical gradients necessary for various cellular processes, including the propagation of nerve impulses in neurons.
The sodium-potassium pump actively transports sodium ions out of the cell and potassium ions into it, despite there being a higher concentration of sodium ions outside the cell and a higher concentration of potassium ions inside. This creates and maintains the necessary ion gradients. As part of this active transport system, ATP is hydrolyzed to provide the energy required for the pump to work, indicating that the cell does indeed expend energy - specifically ATP - in the process.
Which of these is a finger-like sac that has no known function in humans?
Your friend has suffered a broken nose which bones potentially could be involved
What do plants and animals only have in common? Why are the differences important?
What term did mendel used to signify his true breeding first generation?
During an allergic response, histamines are released by mast cells. these histamines bind to receptors on cells in the local environment only
What ethical issues could arise from using embryonic cells as opposed to adult stem cells?
Stem cell research offers great promise for understanding basic mechanisms of human development and differentiation, as well as the hope for new treatments for diseases such as diabetes, spinal cord injury, Parkinson’s disease, and myocardial infarction. However, human stem cell (hSC) research also raises sharp ethical and political controversies. The derivation of pluripotent stem cell lines from oocytes and embryos is fraught with disputes about the onset of human personhood. The reprogramming of somatic cells to produce induced pluripotent stem cells avoids the ethical problems specific to embryonic stem cell research. In any hSC research, however, difficult dilemmas arise regarding sensitive downstream research, consent to donate materials for hSC research, early clinical trials of hSC therapies, and oversight of hSC research. These ethical and policy issues need to be discussed along with scientific challenges to ensure that stem cell research is carried out in an ethically appropriate manner. This article provides a critical analysis of these issues and how they are addressed in current policies.
Through the process of photosynthesis, plants remove carbon dioxide from the air, while producing oxygen and sugar. In space, plants canl serve two main functions: oxygen production and food supply. A plant’s ability to supply the oxygen needs for a person depends largely on the species of plant and the intensity and quality of light it receives. Plant systems can also be used to help purify wastewater. Water evaporates from the leaves and resultant humidity can be condensed as a source of clean water. At very high light intensities, wheat could supply much of one human’s food and all their oxygen needs from an area as small as 15 square meters. At moderate light intensities, a mix of crops could supply a more complete diet for one person from about 50 square meters.
Your task is to design a plant growth chamber to be placed on the moon. You brainstorm with your team and come up with the following concerns"
I. The moon has no atmosphere
II. The moon's surface temperature ranges from -193C to 111C, depending on location and time of day.
III. Day length = about 27 Earth days
IV. Acceleration due to gravity = 1.6m/sec/sec (1/6 of Earth's)
V. No visible water
Consider items I - V. Which item(s) pose the biggest issue(s) with the task at hand: plants undergoing photosynthesis?
A) I.
B) I. and V.
C) I., III., and V
D) All five choices
Answer:
The correct answer would be B) I. and V.
Photosynthesis is the process by which autotrophs or green plants synthesize their food from carbon dioxide and water in the presence of chlorophyll and sunlight.
The oxygen is released as the byproduct of the process.
The overall equation can be written as:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Thus, carbon dioxide and water are the essential substrates for this process.
Hence, the absence of atmosphere and water would be the biggest issues with the given task.
Each of the food groups in MyPlate provide all of the nutrients you need; therefore, eating from any one group will provide all your daily nutrients.
A. True
B. False
Eric’s body returned to its state of constant internal environment after the traumatic incident by which process below?
Although growth rate is variable among types of bacteria the growth of bacteria is dependent on
Which of these is correct regarding the permeability of a specific capillary type?
This scientist focused his study on planetary motion.one of his laws is the planets orbit the sun in elliptical patterns.
Answer: Johannes Kepler
Explanation: Johannes Kepler was the German astronomer and mathematician who first wrote the defense of Copernicus's heliocentric system. He was one of the most important scientists during the scientific revolution, and is best known for his three laws of planetary motion. He found that all planets, when rotating around the sun, are moving along elliptical paths, not circular ones.
All the changes that occur as a living thing grows is called
1.The common pattern of energy flow through the environment is this: light from the sun drives photosynthesis; photosynthesis changes light, water, and carbon dioxide into _____; organisms ingest glucose in the form of food; cells transfer digested food into ATP.
Question 1 options:
carbon
plants
DNA
glucose
The pH indicator bromothymol blue turns yellow when CO2 gas is added to a solution and blue when CO2 is removed from a solution. An experiment will test how the intensity of light affects the rate of photosynthesis in algae. Which of these should be a control for this experiment?
A. Algae that are placed in a yellow solution and keep in the direct sunlight.
B. Algae that are placed in a blue solution and kept in direct sunlight.
C. Algae that are placed in a yellow solution and kept in the dark.
D. Algae that are placed in a blue solution and kept in the dark.
Answer:
The correct answer would be C. Algae that are placed in a yellow solution and kept in the dark.
In a scientific experiment, a control is a variable which is kept constant or unchanged throughout the experiment.
The results of other variables are compared with the control.
It increases the reliability of an experiment.
In the above experiment, algae must be kept in dark in order to prevent photosynthesis and thus, it prevents the utilization of carbon dioxide.
Similarly, the yellow color solution would also act as control as it would help in observing if any carbon dioxide is utilized from the solution. The utilization or removal of the same would convert the solution blue in color.
Why does someone who has lactose intolerance have gastrointestinal problems, such as abdominal distension, gas, cramping, and diarrhea? question 4 options: the lactose is an irritant to the stomach. the lactose in the small intestine neutralizes enzyme action. the undigested lactose in the intestine draws water into the large intestine and is broken down by bacteria. the presence of lactose in the small intestine causes the gall bladder to contract more forcefully?
When samer was born, stimulation in his brain resulted in a massive overabundance of synapses. neurons that were seldom stimulated soon lost their synapses. this process is known as?
A client who's 19 weeks pregnant comes to the clinic for a routine prenatal visit. in addition to checking the client's fundal height, weight, and blood pressure, what should the nurse assess for at each prenatal visit?
larger antlers in elk give a distinctive reproductive advantage to males why
What causes the bacteria to die in an extremely salty environment?
How do organisms use different types of carbon compounds?
Water molecules are ____________ due to _________bonding. This property helps water molecules to stick to each other and allows for the movement of water from plant roots up to plant leaves
Answer: cohesive , hydrogen
Explanation: Cohesion is the force of attraction between similar molecules. Water molecules are cohesive due to hydrogen bonding. This property of water allows the molecules of water to stick to each other.
Water forms hydrogen bond due to the presence of hydrogen atom and a electronegative oxygen atom. The formation of hydrogen bonds leads to the cohesive nature of the substance allowing plants to transport water from their roots up through stems to their leaves due to capillary action which is also a result of hydrogen bonding.
The cerebral cortex has two _____, each of which is further divided into four _____.
The orbital cavities , nasal cavity, paranasal sinuses, and the oral cavity are all located in what region of the body
These are all part of the head or skull. The cavities of the skull surround and protect the brain and sensory organs. There are five kinds of cavities of the skull which are:
nasal cavity (paranasal sinuses is included here) - The nasal septum split the respiratory system into two lateral halves, the nasal cavity is also part of the respiratory system.
cranial cavity - The large cranial cavity is split into a posterior cranial fossa and an anterior cranial fossa, a middle cranial fossa. Its function is to support the brain.
oral cavity - The oral, or buccal, cavity (commonly called the mouth) is a cavity of the head rather than a cavity of the skull because of its fleshy and muscular floor.
orbital cavity - supports and defends an eyeball and its linked muscle, vessels, and nerves.
middle ear cavity - From outer to inner, three small bones-malleus, incus, and stapes are situated within the middle-ear cavities in the petrous part of the temporal bones.
Male mammals inherit an x chromosome from which of their parents? their _____________.
A population is growing at a rate of 2 ,4, 8, 16, 32. Which type of growth does this describe?
The right answer is exponential.
In mathematics, economics and biology, we speak of an exponential (or geometric) growth phenomenon when the growth in absolute value of the population is proportional to the existing population, ie when the growth rate intrinsic is constant and positive.
When the phenomenon of exponential growth is continuous, we can model it by means of an exponential function: Nt = N0 exp (r.t)
N (t) is the number of individuals at time t, N (0) the number of individuals at time 0, r the intrinsic growth rate and t time, exp () being the Euler constant of approximately 2.718 .
Which group of organic compounds found in living things are not energy-rich?