What do all glial cells have in common?
A. They help to transmit the nerve signals.
B. They transfer blood to the various neurons.
C. They all attack pathogens.
D. They assist neurons in their respective functions.
E. They absorb extra blood and cerebrospinal fluid.
Answer: D
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Which secondary brain vesicle forms the portion of the adult brain that includes the epithalamus, thalamus, and hypothalamus?
A. Metencephalon B. Telencephalon C. Mesencephalon D. Diencephalon E. Myelencephalon
In general, the nervous system is composed of which two types of cells?
1. motor 2. neurons 3. sensory 4. glial 5. associative A) 2 and 4 B) 1 and 3 C) 3 and 5 D) 1 and 2 E) 3 and 4
Ribose is the sugar associated with DNA
Indicate whether the statement is true or false
Molecules that can cross a membrane unassisted due so either by
a. carrier mediated transport or facilitated diffusion. b. passive diffusion or active transport. c. conduction or passive transport. d. facilitated diffusion or active transport. e. none of these.