Which type of receptor binds norepinephrine on cardiac muscle, thus increasing cardiac activity?
a. cholinergic
b. nicotinic
c. alpha
d. beta-1
e. beta-2
D
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Although the integument is a covering, it is by no means simple, and some of its functions include ________.
A) the dermis providing the major mechanical barrier to chemicals, water, and other external substances B) resident macrophage-like cells whose function is to ingest antigenic invaders and present them to the immune system C) cooling the body by increasing the action of sebaceous glands during high-temperature conditions D) epidermal blood vessels serving as a blood reservoir
If NADH and FADH2 fail to be oxidized as part of the electron transport chain (ETC), what is affected?
A) the phosphorylation and oxidation of glyceraldehyde-3-phosphate B) the regeneration of oxaloacetate C) the electromotive force required to drive the electron transport chain (ETC) D) the formation of acetyl-CoA
A sample of food is put into a bomb calorimeter and its caloric content is measured. The final measurement reads 100 (large) Calories. How many joules of energy does this food contain?
A. 418.4 joules B. 4,184 joules C. 100,000 joules D. 4.184 joules
Monocytes leave the circulation to become ____________________.
mast cells microphages macrophages A and B are correct all of the choices are correct