Questions
State two problems faced by viruses with RNA genomes, and explain how these viruses address these...

State two problems faced by viruses with RNA genomes, and explain how these viruses address these challenges.

In: Biology

How do protein pumps move ions and small molecules across a cell membrane?

How do protein pumps move ions and small molecules across a cell membrane?

In: Biology

PROTOZOAN GENUS NAMES TO MATCH TO THE CASE STUDY:       Giardia                            &nbs

PROTOZOAN GENUS NAMES TO MATCH TO THE CASE STUDY:      

Giardia                                                                                           Toxoplasma                                                      Trichomonas

Trypanosoma                                                                         Plasmodium

Case 4:

An 11-year-old boy in Thailand was admitted to the hospital due to a sustained fever for 10 days prior to admission. He presented with fever and chills. There were no symptoms of cough or other respiratory tract involvement. There was no jaundice, but two days before admission, there was a stomach-ache and vomiting, but no diarrhea. He complained about myalgia (muscle aches) but did not have any rash or hemorrhages.
His fever was 103oF on admission, and his heart rate was 140 bpm. He had mildly enlarged tonsils, a swollen left submandibular lymph node and tachycardia. There was mild tenderness in the upper right quadrant of the abdomen, with mildly enlarged margins of the liver. His spleen was normal. He had drowsiness but was still oriented.
A peripheral blood smear showed normal-sized Red Blood Cells with a few ring-forms of a trophozoite inside the RBCs. On occasion, faint red dots were seen on the surface of the RBCs.
The patient was placed on Malarone and began to show signs of recovery within a few days.


Question 1: What is the name of this parasite?

Question 2: where is the trophozite of this parasite, usually reside?

_____________________________________________________________________________________________________________________________________________

Case 5

A pregnant woman who lived on a farm with many dogs and cats as outdoor pets presented to an urgent care clinic during the 15th week of her pregnancy. She presented with fever, headache, enlargement of a lymph node on her neck, and symptoms of a common cold.   She was placed on the antibiotic Cefixime, but she remained symptomatic despite the prescription.
An ultrasound of the fetus was taken at week 17, and it showed no anomalies. But since the patient was still symptomatic, she was referred to an ENT (Ear-Nose-Throat) specialist. Fluid was extracted from a swollen lymph node which had continued to swell in size. No parasites were seen in a stain of the fluid. But a follow-up serological blood test was positive for antibodies to the suspected parasite. Under the microscope, the trophozoite of this parasite would be crescent-shaped, 6 micrometers in length, with a prominent nucleus, a pointed anterior end, and a rounded posterior end.
The patient was given pyrimethamine and sulfadiazine, but she could not tolerate them, developing a petechial rash. Spiromycin was then prescribed.
At the 24th week of pregnancy, a fetal scan showed pronounced hydrocephaly and decreased amniotic fluid. The physician recommended termination of the pregnancy, and it was terminated at 178 days. The male fetus was covered in meconium and had developed the same petechia as the mother had during her drug reaction.

Question 1: what is the risk factor in this case?

Question 2:what is the caustive agent?

In: Biology

A disaster such as a meltdown in a nuclear power plant requires close examination of potential...

A disaster such as a meltdown in a nuclear power plant requires close examination of potential impacts on organisms. Which of the following would be useful to biologists in such a situation?

Use a molecular clock to time the divergence of species in an area from those far away.
Measure continental drift to determine if the disaster had accelerated movement of continents.
Use radiometric dating to determine if new species are forming.
Examine the mutation rate of species in the area.

In: Biology

Provide ạn exạmple of eạch for control of glycogen metạbolism: ạ. Hormone control b. Ạllosteric control...

Provide ạn exạmple of eạch for control of glycogen metạbolism:

ạ. Hormone control

b. Ạllosteric control

c. Control by covạlent modificạtion

In: Biology

10. Glutamate is an example of an excitatory amino acid neurotransmitter that acts via direct synaptic...

10. Glutamate is an example of an excitatory amino acid neurotransmitter that acts via direct synaptic transmission when it is released from presynaptic neurons in the brain.

Which of the following is a mechanism by which an action potential is LEAST likely to occur in the associated postsynaptic neuron? Summation of ionic events


  1. temporally from rapid stimulation of the presynaptic neurons that release glutamate

  2. spatially from the glutamate-releasing neurons and other neurons releasing an excitatory neurotransmitter that acts via an indirect mechanism

  3. spatially from the glutamate-releasing neurons and other neurons releasing the excitatory transmitter, aspartate

  4. spatially from the neurons releasing glutamate and other neurons releasing the inhibitory transmitter, GABA

  5. spatially from many postsynaptic neurons that release glutamate.

In: Biology

Draw a diagram that shows how the element Calcium might cycle through the components of a...

Draw a diagram that shows how the element Calcium might cycle through the components of a terrestrial ecosystem, including different trophic levels. Label all arrows that show Calcium fluxes and depict the direction of Calcium flow with the direction of arrows. Include all major components and fluxes in an ecosystem nutrient cycle.

Some hints: Calcium originates from rocks and soil minerals. There is hardly any in the air except in dust. Calcium is needed by all organisms, in large quantities for bones and shells in animals, but also for essential cell functions in bacteria, other microbes, plants, and animals.


Create a flow chart diagram with labeled arrows and either labeled boxes or labeled drawings of ecosystem components.

In: Biology

1. Name the three phases of an action potential. Describe for each the underlying molecular basis...

1. Name the three phases of an action potential. Describe for each the underlying molecular basis and the ion involved. Why is the term voltage-gated channel applied to Na+ channels involved in the generation of an action potential?
2. Explain why the strength of an action potential doesn’t decrease as it travels down an axon.
3. Neurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What is the name of the extension of the neuron at which such signals are received? How does the neuron integrate these signals to determine whether or not to generate an action potential?

In: Biology

Explain how epinephrine regulates the breakdown of glycogen. can you have clear steps & explanations  

Explain how epinephrine regulates the breakdown of glycogen.

can you have clear steps & explanations  

In: Biology

Antibiotics are routinely used to control bacterial infections. Would compounds targeting the peptidoglycan layer of bacteria...

Antibiotics are routinely used to control bacterial infections. Would compounds targeting the peptidoglycan layer of bacteria be useful as antibiotics? Explain the reason behind your answer?(HINT: Think about the concept of selective toxicity)

In: Biology

Please Use your keyboard (Don't use handwriting) PHC 261 I need new and unique answers, please....

Please Use your keyboard (Don't use handwriting)

PHC 261

I need new and unique answers, please. (Use your own words, don't copy and paste)

( Please i need more than 500 words please)

Q. 1. Write essay note on Occupational safety and health protection of health workers from acute respiratory diseases during respiratory diseases outbreaks
following subtitle: (Minimum & Maximum 2-3 pages)
1.   Mention the epidemic and pandemic respiratory diseases recommended for protection of health workers
2.   As a health worker how can protect your self-form diseases mention above?
3.   What is the role of the administrations to protect health workers?

___

please complete my answer to be 500 words...

Safety is done by taking some precautions like avoidance of iritant through its removal from workplace or through technical shielding by the use of potent irritant in closed systems or automations ,,, improve the related laws about health safety, by taking care of adaptation and adjustment of workers.

All workers should wear mask on face.

They should always wash their hands with hand wash, or use sanitizers if handwash is not available..

Avoid contact with people who are seems to b unhealthy or having cold like symptoms  

They should always use tissue papers for cleaning nose or use tisse papers during sneezing for closing the nose.

1)...

Epidemic disease like weil syndrome, yellow fever, bubonic plague, influenza, small pox, chicken pox, typhus, syndemic infection, hepatitis B and D.

Pendamic- cholera, covid 19, ebola, influenza etc.

2) by taking the same precautions which are written above according to particular disease.

3) labour inspection

Training and education about safety

Develop a safety compliance plan.

B

In: Biology

Imagine two species of snakes that live in a tropical rain forest of Malaysia do not...

Imagine two species of snakes that live in a tropical rain forest of Malaysia do not typically interbreed. In nature, one species is ground-dwelling and feeds mainly on insects and small amphibians near water, whereas the other snake feeds in the lower to mid-canopy of trees and vines rising from the forest floor. However, at a zoo in Singapore where they were kept in the same gallery exhibit, the two species were observed interbreeding and produced viable offspring. Which of the following reproductive barriers is most likely preventing these species from interbreeding in the forest?

  • habitat isolation
  • gametic isolation
  • reduced hybrid viability
  • a postzygotic barrier
  • mechanical isolation

In: Biology

A previous group of students wanted to investigate the factors that contribute to female fecundity (total...

A previous group of students wanted to investigate the factors that contribute to female fecundity (total number of eggs a female lays).  They wondered if the female’s body weight might play a role.  The students collected and weighed 15 newly-emerged virgin female bean beetles.  Each female was mated and given plenty of black-eyed peas on which to lay eggs.  Each day the students checked the beans for eggs, counted the number of eggs, and gave the female fresh beans.  When the female died, the students added up the total number of eggs each female laid.

  1. What is the independent variable?  What are the potential values for this variable? What is the dependent variable?  What are the potential values for this variable?
  2. What are the study subjects?  Be specific!
  3. What might be the researchers’ hypothesis?
  4. What type of scientific study did the researchers conduct?
  5. If this study is an experiment, what are the treatments?  Label the treatments as either experimental or control.
  6. What was the sample size of this study?
  7. List three potentially confounding variables that were or should have been controlled in this study.

In: Biology

How does cyanide poisoning relate to respiration? limit to 1 paragraph

  1. How does cyanide poisoning relate to respiration? limit to 1 paragraph

In: Biology

Codes of ethics and standards for professional nursing practice have been developed by some professional nursing...

  1. Codes of ethics and standards for professional nursing practice have been developed by some professional nursing organizations. These codes and standards guide us in our practice and our interactions with consumers, other nurses, and other health care professions. Select at least one of the ethical standards or one of the standards of practice and tell us how you implement this in your current practice or how you will implement it in your future practice. Which standard is most challenging to you, and why?
  2. Please provide an example of an ethical dilemma you have experienced. How were these issues be addressed/resolved?

IN YOUR OWN WORDS! 100 WORDS FOR EACH QUESTION.

In: Biology