Commissural fibers connect:
a. lobes
b. hemispheres
d, adjacent gyri
d. thalamus to cerebrum
Answer: b. hemispheres
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When women with breast cancer undergo surgery to remove the tumor or the entire breast, the axillary lymph nodes are often removed as well. Why?
A. In removing the breast, the blood supply to the nodes is removed and they will inevitably cease to function. B. The axillary lymph nodes receive lymph from the breast and may contain cancer cells. C. The nerves that supply the axillary lymph nodes are often cut during the breast surgery. D. It is impossible to remove the breast without physically damaging the lymph nodes. E. With the removal of the breast, there is no further need for lymph drainage and filtering in that part of the body.
Polar bears have black skin. This characteristic helps them deal with cold stress by
a. increasing the amount of air trapped next to the skin. b. increasing the absorption of radiant energy from the sun. c. increasing the insulation provided by subcutaneous fat. d. reducing heat loss by restricting blood flow to the skin.
Glucose is transported ______
A) through the basolateral membrane by cotransport with sodium B) through the apical membrane by facilitated diffusion C) through the basolateral membrane by facilitated diffusion D) through the basolateral membrane by secondary active transport
If a blood cell is placed in a hypertonic solution:
a. water will enter the cell b. water will leave the cell c. it will crenate d. both B and C above