Oscillation of the small intestion does all of the
following EXCEPT
a. move the food along the small intestine.
b. churn the food.
c. bring the contents to the wall of the tract where
they can be absorbed.
d. package the food into small portions.
e. mix the contents together.
Answer: d
You might also like to view...
Light that is absorbed by water is converted to:
a. short wave radiation. b. long wave radiation. c. heat. d. mass. e. green light.
Which statement best describes why an individual's antibodies and T cells do not attack their own cells?
A) Opsonins keep leukocytes from binding to the B and T cells B) B and T cells mature in the bone marrow and thymus; their antigen receptors are, in effect, tested for their potential to recognize and react against self. C) B and T cells develop into plasma cells which dissolve automatically into the plasma, thus they are not recognized as foreign. D) Interferons interfere with antibodies trying to attach to the B and T cells E) B and T cells have about 100,000 antigen receptors and so they can match anything in the human body.
Sutherland discovered that the signaling molecule epinephrine _____
A) brings about a decrease in levels of cAMP as a result of bypassing the plasma membrane B) causes lower blood glucose by binding to liver cells C) interacts directly with glycogen phosphorylase D) elevates cytosolic concentrations of cyclic AMP
Choose the correct statement regarding estrous and menstrual cycles.
A. Ovulation only occurs in animals with a menstrual cycle. B. Copulation can only occur during ovulation in the menstrual cycle. C. Menstrual cycles are longer than estrous cycles. D. The lining of the uterus is shed during menstruation and estrous. E. Animals with estrous cycles are sexually receptive only when they are ovulating.