Which of the following is a portal system?
A) Heart ? artery ? arteriole ? capillary bed ? venule ? vein ? vein ? heart
B) Heart ? artery ? vein ? heart
C) Heart ? artery ? arteriole ? capillary bed ? arteriole ? capillary bed ? venule ? vein ? heart
D) Heart ? artery ? artery ? arteriole ? capillary bed ? venule ? vein ? heart
C
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The pituitary hormone that promotes egg development in ovaries and sperm development in testes is
A) TSH. B) ACTH. C) FSH. D) LH. E) GH.
More than 95 percent of the protein in a red blood cell is
A) albumin. B) porphyrin. C) hemoglobin. D) immunoglobulin. E) fibrinogen.
Describe a typical strand of hair
A) A keratinous strand produced by basal cells within a hair follicle. B) A small connective tissue peg filled with blood vessels and nerves. C) A bundle of smooth muscles attached to a hair follicle. D) A layer of epithelial cells surrounding a deep layer of connective tissue. E) Many layers of dead, tightly compressed cells packed with keratin.
The epidermal ________ are downward waves that are extensions of the epidermis and lie between the dermal papillae.
Fill in the blank(s) with the appropriate word(s).