Identify and discuss the factors that contribute to systemic vascular resistance
What will be an ideal response
1 ) Blood viscosity is dependent on the ratio of formed elements and proteins to plasma. In general, increased viscosity, via increased formed elements or decreasing plasma volume, increases resistance. 2 ) Total blood vessel length is directly proportional to resistance; thus, increasing length of circuit (by adding new blood vessels to serve added tissue) increases resistance. 3 ) Diameter/radius of blood vessels, which is primarily controlled by ANS, has a major effect on resistance. Increased vessel diameter decreases resistance, thus increasing flow. In general, changes in the diameter of small vessels (e.g. arterioles) have greater effect because more surface area is in contact with blood.
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Newborns are at much higher risk for dehydration than adults. Why?
What will be an ideal response?
Describe the functions of osteogenic cells and osteoblasts
A) Osteogenic cells are stem cells that form osteoblasts. Osteoblasts are immature bone cells that secrete the organic components of bone matrix. B) Osteogenic cells are immature bone cells that secrete the organic components of bone matrix. Osteoblasts are mature bone cells that maintain the bone matrix. C) Osteogenic cells are stem cells that form osteoblasts. Osteoblasts are cells that remove bone matrix. D) Osteogenic cells are cells that remove bone matrix. Osteoblasts are immature bone cells that secrete the organic components of bone matrix. E) Osteogenic cells are mature bone cells that maintain the bone matrix. Osteoblasts are cells that remove the bone matrix.
Which type of joint is found between the carpal bones?
A) saddle B) gliding C) hinge D) ball-and-socket E) pivot
Where are follicles located?
A. Medulla of the ovary B. Cortex of the ovary C. Center of the ovum D. Epithelium of the endometrium E. Epithelium of the placenta