During axonal projection, multiple axons cluster together using (A)__________. This process is known as (B)__________.
a. (A) extracellular matrix (ECM) (B) cell migration
b. (A) extracellular matrix (ECM) (B) fasciculation
c. (A) cell adhesion molecule (CAM) (B) cell migration
d. (A) cell adhesion molecule (CAM) (B) fasciculation
Answer: d. (A) cell adhesion molecule (CAM) (B) fasciculation
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The most significant finding from the "split brain" patients studied by Roger Sperry and his collaborators was that
A. to evaluate the functional capacity of each hemisphere in split-brain patients, it is essential to provide information to one side of the brain only. B. in most human brains, the left hemisphere is specialized for processing verbal and symbolic material; the right hemisphere is specialized for visuospatial and emotional processing. C. the severing of the corpus callosum is a necessary and effective remedy for halting grand mal seizures in epilepsy. D. the right and left hemispheres are mirror images of each other and equally dominant in producing and understanding language in humans.
Answer the following statements true (T) or false (F)
1.All tropisms result from differential growth in which one side of the responding organ grows faster than the other. 2.An organ is composed of two or more interacting tissues. 3.A tissue is defined as a group of interacting cells that provide a specific function. 4.Epithelial tissues never have a free surface exposed to a space inside the body. 5.Both loose and dense connective tissue contain fibroblasts.
The breakdown of pyruvate in the Krebs cycle
results in the release of a. energy. b. carbon dioxide. c. oxygen. d. hydrogen. e. all except oxygen.
What allows fetal hemoglobin to remove oxygen from maternal hemoglobin?
A. Fetal blood contains twice as many hemoglobin molecules than maternal blood. B. Fetal hemoglobin molecules are much larger than maternal hemoglobin molecules. C. Fetal hemoglobin has an extra heme group. D. Fetal hemoglobin has a higher affinity for oxygen than does maternal hemoglobin. E. Oxygen is more soluble in fetal blood than maternal blood.