Compare the hearts of a trained athlete and a non-athlete
What will be an ideal response?
The athlete's heart will be more massive, and will have a higher resting stroke volume and a lower resting heart rate. During maximum activity, stroke volume will be much greater for the athlete, and cardiac output of the athlete may approach 30 liters/minute compared to 20 liters/minute of the non-athlete. Maximum heart rates will be about the same despite the much larger cardiac output, due to the larger stroke volume.
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The inner cell mass
A. becomes part of the placental membrane. B. gives rise to the embryo. C. becomes part of the chorion. D. forms the amnion.
The sacrum consists of how many fused bones?
A) 7 B) 5 C) 4 D) 3 E) 6
Astrocytes produce myelin for the cells of the central nervous system.
Indicate whether the statement is true or false.
What condition results from elevated pressure within the eyeball due to inadequate reabsorption of aqueous humor?
A. Macular degeneration B. Astigmatism C. Myopia D. Glaucoma E. Cataracts