If heart rate is 100 beats per minute and cardiac output is 5000 ml/min, then stroke volume is ______.
a. 5,000 ml
b. 500,000 ml
c. 100 ml
d. 50 ml
Ans: d. 50 ml
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Steroid hormones include
a. estrogens. b. growth hormone. c. melatonin. d. thyroid hormone. e. oxytocin.
In maize, some alleles at the seed coat locus influence our ability to visually determine the endosperm color phenotype
Specifically, an opaque seed coat prevents us from seeing the endosperm within, while we can readily see the endosperm in seeds with transparent coats. The opaque coat color allele thus appears to mask the expression of endosperm color alleles, providing an example of A) codominance. B) pleiotropy. C) polygenic inheritance. D) epistasis. E) maternal effect.
Trace the path of an inhaled air molecule in a human being.
A. nasal cavity-pharynx-larynx-glottis-trachea-bronchi-bronchioles-alveoli B. nasal cavity-pharynx-glottis-trachea-larynx-bronchi-bronchioles-alveoli C. nasal cavity-pharynx-glottis-larynx-trachea-bronchi-bronchioles-alveoli D. nasal cavity-pharynx-glottis-larynx-trachea-bronchioles-bronchi-alveoli E. nasal cavity-glottis-larynx-trachea-pharynx-bronchi-bronchioles-alveoli
Beer, wine, and spirits are produced as the result of cellular metabolism by:
A) bacteria occurring in the absence of free electrons. B) yeast occurring in the absence of oxygen. C) yeast occurring in the absence of free electrons. D) bacteria occurring in the absence of oxygen. E) pyruvate occurring in the absence of oxygen.