The two types of cells that make up the nervous system are
A. macrophages and mast cells.
B. neurons and glial cells.
C. neurons and chondrocytes.
D. mast cells and fibrocytes.
E. neurons and mast cells.
Answer: B
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On day 14 of a typical 28 day menstrual cycle, LH concentration in the blood will be ________. The endometrium will be ________. Estrogen concentration in the blood is ________
A. level; sloughing off; low B. at or near a peak; near the end of the proliferative phase; relatively high C. low but rising; in the secretory phase; high D. at or near a peak; in the secretory phase; low E. level; starting the proliferative phase; level but high
An arteriovenous __________ is a route by which blood flows from an artery to a vein without passing through capillaries.
A. atheroma B. sinus C. thoroughfare channel D. anastomosis E. valve
Hair color is due to a pigment known as ________
A) hemoglobin B) carotene C) keratin D) melanin
Nitric oxide (NO) acts as a neuromodulator by altering synaptic function
Indicate whether the statement is true or false