Answer the following statements true (T) or false (F)
1.A fever has no defense function, but only acts as a sign that an infection is present in the body.
2.Lymphatic capillaries help to recycle the contents of blood plasma, thus helping maintain homeostasis in the circulatory system
3.The primary immune response produces memory cells that stimulate a faster immune response on a subsequent exposure to the same foreign antigen.
4.Secondary immune responses, to diseases, depend on and follow primary immune responses.
5.Human development is an example of direct development.
1.FALSE
2.TRUE
3.TRUE
4.TRUE
5.TRUE
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Members of the ____ Lophotrochozoan phylum are acoelomate, dorsoventrally flattened,and do not have circulatory
or respiratory systems.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
Depression is treated by drugs that slow the uptake of which neurotransmitter?
a. epinephrine b. adenosine c. dopamine d. serotonin e. endorphins
Elephants can live for between 50 and 70 years
and a cow (female elephant) typically gives birth to 3 or 4 calves. What type of survivorship curve applies to them?
a. type I b. type II c. type III d. none of these types e. more than one of these types
In the nitric oxide signaling pathway, nitric oxide activates an enzyme that can convert many molecules of GTP into molecules of cGMP. cGMP is a small molecule that can diffuse through the cytoplasm and bind to an enzyme called protein kinase G (PKG). Binding of cGMP to PKG leads to a change in the confirmation of PKG that leads to its activation. What type of signaling molecule is cGMP?
A. Adapter protein B. Enzyme C. Second messenger D. Scaffold