____________________ along axons reduces resistance and, hence, increases impulse velocity
Fill in the blank(s) with correct word
myelin
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Which of the following is unique to meiosis?
nuclear membrane breaks down DNA organizes into chromosomes crossing-over chromosomes align along the central plate of the cell None of the choices are correct.
The "tanning" effect (darkening of the skin) that occurs when a person is exposed to the sun is due to the increased presence of ________
A) melanin B) keratin C) oil D) epidermis dendritic cells E) sweat
Antidiuretic hormone
A) increases the permeability of the collecting ducts to water. B) is secreted in response to low potassium ion in the blood. C) causes the kidneys to produce a larger volume of very dilute urine. D) is secreted by the anterior pituitary. E) release is insensitive to the osmolarity of interstitial fluid.
Excessive thirst is called ____
a. polydipsia b. polynurea c. polyphagia d. glycosuria