If the hematocrit is 40, then the volume occupied by the
a. red blood cells is 60% of the total blood volume.
b. white blood cells is 40% of the total blood volume.
c. red blood cells is 40% of the total blood volume.
d. plasma and other cellular elements is 40% of the total blood volume.
e. more than one of these.
C
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Given two muscles of equal mass, a short, thick muscle and a long, thin muscle, one would expect the short, thick muscle to
A) Contract with a greater force. B) Have its sarcomeres arranged in series rather than parallel. C) Shorten faster and further, but generate less force. D) All of the above
The youngest female documented to have given birth to a healthy child was a 5-year-old girl in the 1930s; the father was never identified. She began having regular menstrual periods around eight months of age. She was diagnosed as pregnant after being taken to a doctor for suspicion of having an abdominal tumor; her periods had ceased several months earlier and her breasts were well-developed.
When do the reproductive organs normally develop? Describe the maturation her body underwent to render her fertile, specifying at what ages these changes normally take place. Even without a positive pregnancy test, what clues suggest pregnancy rather than a tumor? What is the earliest age at which gamete development normally begins and ends in both genders? What will be an ideal response?
With regard to the healing of a skin wound, macrophages ________.
A. produce and secrete collagenous fibers B. phagocytize and digest tissue debris C. release histamine to increase blood flow to the area D. stimulate epithelial cells to multiply E. make capillaries more permeable allowing white blood cells to migrate into the area
What are the functions of areolar tissue?
What will be an ideal response?