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Why have both an endocrine and a nervous system? Although we have not yet studied the endocrine system, you know enough about it to answer the question. Both systems use chemical messages (hormones or neurotransmitters) and they are often identical molecules. The endocrine system releases hormones into the bloodstream and they are carried everywhere. The nervous system stores neurotransmitters at nerve endings in synaptic vesicles and they are released at a very specific location. (You may want to read some basic information about each system.) Speed of action is an obvious answer, but it is not an acceptable answer. Neither is duration of action (both can cause long and short term effects). There is a more important difference in the action of the two systems. To answer the question, consider how each system would do some simple job normally done by the other system (it can be done). You can assume that any neurotransmitter could be a hormone (stored and released by an endocrine gland), and that any hormone could be a neurotransmitter (stored and released from synaptic vesicles).
Explain the events that occur when epinephrine binds to a G-protein coupled receptor in the membrane of a cell. Begin with the binding of the epinephrine and end with the activation of adenylyl cyclase.
Genetic variation in the population of organisms is good; but, sometimes mutations can be harmful or cause genetic disorders.
Sickle cell anemia is a disease of red blood cells in which the genetic mutation in DNA leads to a mutation in hemoglobin. A single base vary alters the DNA sequence CTC to CAC which codes for the wrong amino acid. What amino acid is coded for throug..
Cellular Respiration and the Photosynthesis co-exist as the paired metabolic processes. Photosynthesis utilizes light energy to transform carbon dioxide into glucose, a simple sugar.
Hormone Z, responsible for maintaining normal blood levels of chemical A, binds to membrane-bound receptors on its target cells. These target cells use G-protein and cyclic AMP to carry out the response of hormone Z. compute the consequences if a dru..
What is estimated density of firs in the forest. Why then is the gene called Dorsal, and not, for instance, Ventral.
How do plant and animal cells metabolize energy in complementary ways? What does this suggest about the flow of energy and the recycling of elements through living organisms? Could we think of any other similar relationships.
Jill is motivated by money and the things money will bring her. Jack is motivated by a belief in the significance of doing good things, and his incentives are based on that belief. Which theory incorporates both these types of motivational causes.
Imagine looking during a microscope at a squashed onion root tip. The chromosomes of many of cells are plainly visible. In some cells, replicated chromosomes are aligned along center (equator) of the cell. These particular cells are in which stage of..
Imagine that the sample of sediments are cemented together to form a sedimentary rock. After that, that rock is heated and compressed into a metamorphic rock.
What offspring phenotypes would you expect from mating between a 15-cm and 30-cm pig. How many pairs of genes are regulating the tail length character? (Hint: count the phentotypic classes, or find out the sum of the ratios of the classes)
What are the underlying mechanisms that help assist a species to originate using sympatric speciation although they are not reproductively isolated like in allopatric speciation.Diversity within species that is using sympatric speciation.
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