The human body is very complex and seeks to maintain a constant internal environment. This state of dynamic equilibrium is called homeostasis. Some diseases such as diabetes can impact the body's ability to maintain homeostasis. To maintain a relatively constant internal environment, the human body uses negative and positive feedback.
1. As a medical professional, how would you explain the role negative and positive feedback plays in maintaining homeostasis to a newly diagnosed diabetic patient?
In: Biology
Which of the following is a characteristic of a cytotoxic T cell?
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Which of the following cells can be classified as a professional antigen presenting cell?
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Which of the following destroys virus-infected cells?
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What type of immunity results from recovery from mumps?
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What type of immunity results from vaccination?
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In: Biology
What are the macroscopic features (neuropathology) of chronic TBI? How is the structure of the brain affected?
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fetus as an Allograft but not occur rejection ?why
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1. The krill Euphausia pacifica, feeding on the diatoms, increased in dry weight by an average of 1.6 mg per month, while consuming an average of 5.0 mg dry weight of prey. This krill assimilates its prey with 80% efficiency. Calculate the gross growth efficiency and the net growth efficiency for this krill.
2. In general, growth efficiency for marine fish is much higher than that in terrestrial mammals. Explain reasons for that.
In: Biology
different between MHC class 1 and MHC class 2 (Table)
In: Biology
In: Biology
How does allosteric modulation regulate glycolysis, gluconeogenesis, and glycogen levels?
In: Biology
There are two types of genetic drift. Describe and give an example of both the bottle neck effect and the founder effect.
Your assignment should be 250-500 words in length.
In: Biology
1. What is activation energy?
| A. The energy used by the active site to split a substrate. |
| B. The energy released when a substrate binds to an active site. |
| C. The energy required to start a metabolic reaction. |
| D. The energy required to raise the temperature of 1 gram of water by 1 degree Celsius. |
2. Which statement defines your body's metabolic rate?
| A. The speed at which chemical reactions occur when you are resting but awake |
| B. The number of Calories needed to keep your weight stable |
| C. All of the chemical reactions in your body |
| D. A measure of your body’s energy use |
3. Which statement about enzymes is true?
| A. One enzyme can catalyze many different types of reactions for a variety of substrates. |
| B. The shape of an enzyme determines its specificity. |
| C. Enzymes eliminate the activation energy barrier. |
| D. An enzyme molecule is permanently changed by the substrate molecule. |
4. Which reaction occurs during glycolysis?
| A. Glucose is converted into carbon dioxide. |
| B. Glucose is converted into water. |
| C. Glucose is converted into ATP. |
| D. Glucose is converted into pyruvic acid. |
In: Biology
Sensory systems allow us to perceive different types of stimuli in the environment. Compare similarities and differences of sensory transduction processes in the visual, hearing, vestibular and somatosensory systems. Discuss common causes, molecular mechanisms of sensory transduction dysfunction and potential treatment approaches for correcting sensory transduction in the aforementioned sensory systems
In: Biology
In: Biology
Discuss the main pathways underlying the bi-directional cross-talk between the gastrointestinal system and the brain. How is this cross-talk regulated by multiple signals including glucose, metabolic hormones and microbiota under the physiological condition? How can these pathways be targeted to develop potential treatments for some neurological disorders?
In: Biology