Predict the effect of decreased levels of dopamine on the substantia nigra of the basal nuclei
What will be an ideal response?
The neurons of the substantia nigra are called dopaminergic neurons because they release the neurotransmitter dopamine. These dopaminergic neurons project to the caudate nucleus and putamen, and when dopamine binds their receptors, their inhibitory output to the globus pallidus is enhanced. The overall effect is an increase in the eventual activation of the upper motor neurons that will stimulate the desired motor activity. The input of the substantia nigra is thus vital for initiating movement. When dopamine levels decrease, a movement disorder such as Parkinson's disease can result.
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Answer the following statements true (T) or false (F)
1. In one square inch of skin, there are more oil glands than sweat glands. 2. In one square inch of skin, there are about twice as many pressure sensors as heat sensors. 3. The hypodermis is the layer of the skin found between the epidermis and the dermis. 4. Strong, tough collagen fibers can be found in both the dermis and epidermis of the skin. 5. Hair in certain parts of the body is stimulated to grow by the presence of hormones.
Whereas diffusion is more important for solute exchange between plasma and interstitial fluid, bulk flow is more important for regulation of the relative volumes of blood and interstitial fluid
Indicate whether the statement is true or false
Which condition is caused by roundworm infection and characterized by a dramatic accumulation of fluid, especially in the extremities?
A. Sickle cell disease B. Elephantiasis C. Lymphadenopathy D. Lymphadenitis E. Lymphoma
Which of the following is a purpose for bandaging?
a. protection c. immobilization b. prevention of movement d. all of the above