Which of the following statements concerning the spinal cord is false?
a. It shows some plasticity and ability for training.
b. It serves as a nerve corridor from the body to the brain.
c. It is responsible for some reflexive actions.
d. It is composed of cell bodies, dendrites, and axons but not glial cells.
e. It contains both sensory and motor nerve
D
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Which area of the cerebral cortex is important for the formulation of thoughts into speech?
A. Broca's area B. the pons C. the medulla oblongata D. Wernicke's area E. the cerebellum
Why must T cell activation take place outside the thymus?
A. An activated T cell could destroy the other maturing T cells. B. An activated T cell could then destroy the thymus gland itself. C. Many T cells are self-reactive and must be eliminated in the thymus before any possibility of activation. D. Other cell types might be accidentally activated in the thymus.
Answer the following questions true (T) or false (F)
1. Nearly half the antibiotics used in the United States go into animal feed as growth stimulants. 2. Malaria is caused by a bacterium. 3. Most protists are unicellular.
A measurement of a microbe is reported as 1 × 10-6 m, also known as
A. centimeters (cm). B. millimeters (mm). C. micrometers (?m). D. nanometers (nm). E. yards.