Explore BrainMass

Human Biology


Matching: Match the following conditions to their correct characteristics. 1. ___ pituitary dwarfism A. affected adults are proportionally similar to average-size people but larger. 2. ___ gigantism B. affected adults are proportionally similar to average-size people but much smaller. 3. ___ diabetes insipidus C. excessive


A. nutrition B. infections C. prescription drug D. alcohol E. cocaine f. cigarette smoke G. anti-acne drugs H. all of the preceding threats 1. About 60-70 percent of newborns of these women have FAS. 2. In the case of rubella, there is a 50 percent chance of some organs won't form properly. 3. In cases of exposure to

Compare & contrast the molecular/biochemical events

Compare & contrast the molecular/biochemical events associated with short-term sensitization and long-term sensitization in Aplysia. How is LTP (both early and late) of the mammalian hippocampus similar to and/or different from sensitizations in Aplysia?

Partial Pressures of Gases in Blood

When our professor was teaching this subject she kept referring to how this correlates to atmospheric pressure. Others in the class and myself asked her to be more specific but, it did not help. Can this be explained a little better, just how does pressure of gases in blood correlate with atmospheric pressure? Can you explain H

Study Question

A minature end plate potential (MEPP) is : Which of the following A quantal depolarization that occurs at the specialized region of a muscle fiber (end plate) at a neuromuscular junction. Is produced by the activation of post-synaptic receptors by the ligand acetylcholine (a neurotransmitter) Causes hyperpolarizati

Study Question

Explain the fundamental differences between senstization , habituation, and classical conditioning?

Does NYC meet the criteria as being a "livable" city?

Does NYC meet the criteria as being a "livable" city? Why or why not? and if there is any room for improvement? Why or why not? **Note** The world's most livable cities are not those with "perfect" auto access between all points. Instead, they're cities that have taken measures to reduce outward sprawl, diminish automobile tr

Agression and the amygdala

One treatment for overly agressive people is Prozac (fluoxetine), a serotonin reuptake inhibitor. Please provide speculation on how the amygdala in conjunction with serotonin works to alter behavior. Thank you.

Motor neurons and GABA

Why are most neurons GABAergic? What are the advantages to have GABA neurons in motor systems? Thank you.

Reducing Air Pollution: Designing a City

How would you create a city that does not produce more air pollution than the atmosphere can cleanse naturally? In creating this more sustainable environment, consider livability, safety, and convenience. Consider this as your personal game of Sim City. How do you design a city that does not produce more air pollution than th

ADH and Angiotensin

Explain in layman's terms the interconnected roles of ADH and angiotensin. PLEASE include a diagram.

How many items in your salad were locally grown? Opinion may be required.

------------------------------- You are eating a fruit salad that contains the following ingredients: bib lettuce, bananas, apples, coconut, kiwi, mango, avocado, figs, and almonds. Make a list or each item in your salad and their countries of origin. Include why each fruit grows well in that particular area. Then, search the

Organisms - Biology Study Guide

I would like to have a study guide for my biology exam coming up this week. Could you find the answers to these questions? 1. Does a clam have no body symmetry, bilateral symmetry, or radial symmetry? 2. Indicate each of the following organisms whether they are classified under the Porifera phylum, the Cnidarian phylum,

An practical investigation into the kidney's homeostatic functions

An investigation into the kidney's homeostatic functions Introduction The kidneys contribute to the regulation of the water and electrolyte balance and the acid-base status of the body through hormonal influence on renal activities. There is a wide variation between individuals in the formation of urine, in any one individ

Biological concepts from the non-science major perspective

The stem cells are captured from embryonic cells, but they also can be captured from the placenta and umbilical cord. a. If this is the case, why is there so much controversy on the subject? (It is not unethical after all to capture stem cells from the placenta or umbilical cord after the birth of a child). b. Also,


What would happen if a person was intravenously injected with distilled water instead of isotonic saline? And how would haemolysis rates change of a person who hand sickle cell disease?

Lumps and Bumps

I have been reading a lot about fibromyalgia lately and in a book by a Dr. Amand, as reported by a couple of Drs. 25 years ago - states that calcium remains immobile due to a lack of Action potentials because people with FMS have a 25% drop of ATP levels in their muscle thus not allowing calcium to be moved via active transport.

Calcium and Calcitonin

Trying to figure something out-if there were an excess of Calcium due to Action potentials stopping for some reason, what, if anything would prevent calcitonin from lowering the level? Is there anything else responsible for lowering calcium? What would happen if the calcium just stayed in one placed unchecked-lumps/bumps??

Hemostasis and the Endocrine System

How does the pancreatic endocrine hormones {glucagon and insulin} work antagonistically to maintain homeostasis in the body, during times of feast and times of famine? How is this process related to negative feedback?

Endocrine System Experiment

Experiments on young rats suggest that exposure to stress in early life is important if an animal is to develop a well functioning endocrine system and thrive. How does stress stimulate a person's endocrine system? What are the hormones involved in the stress response? How do these hormones enable a person to better mee

Osmosis & Kidney Functioning are correlated.

Why is osmosis important to proper kidney functioning? Include how osmosis is related to nephron physiology. How does the nephron perform filtration, reabsorption and tubular secretion? What are some examples of "water following salt." These areas are encompassed.

Homeostasis is related to blood pressure.

How do negative feedback mechanisms contribute to homeostasis? What are some examples in terms of temperature regulation and blood pressure maintenance? What would happen if temperature regulation were suddenly controlled by a positive feedback loop? These questions are pondered.

Smell receptors

You are invited to go sailing while on vacation at the ocean. When you first step on the boat, the smell of sea water is strong and you feel the motion of the water beneath your feet. After a few minutes, the smell fades and you no longer notice it, but the rolling motion of the boat remains and within an hour you begin to feel

Drosophilla crosses are calculated.

In a lab strain of Drosophila, cinnabar (cn) and brown (bw) are recessive eye colour mutations known to be 41 m.u. apart on chromosome 2. When similar mutant alleles were induced in a strain from nature, the same linkage of cn and bw was observed. However, when a wild-type strain from nature was crossed with a cn bw/cn bw lab st

Punnett Square tests are noted.

You do a Punnett Square on a dihybrid cross and end up with two classes of individuals. Is there a problem? What could be a reason for this? Ideas are explained.

Epinephrine's purpose in vaccination is traced.

Physicians administering live, attenuated mumps and measles vaccine prepared in chick embryos keep epinephrine available. Epinephrine will not treat these viral infections. What is the purpose of keeping this drug on hand?