Which condition is stimulated by allergens and results in bronchoconstriction, airway inflammation, and difficulty in exhaling?
A. Emphysema
B. Tuberculosis
C. Pulmonary fibrosis
D. Chronic bronchitis
E. Asthma
E. Asthma
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In the diagram, which is a melanocyte?
a) A b) B c) E d) F e) G
If multicellular organisms have distinct cell types, this means that
A) The different cell types express different genes. B) Each cell can be different. C) Some of the organism's cells will grow larger over time. D) Some cells will have cell walls and others won't.
The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal
pigmentation and a = albinism) are A) phenotypes-50% normal and 50% albino; genotypes-all homozygous recessive. B) phenotypes-50% normal and 50% albino; genotypes-50% homozygous recessive and 50% homozygous dominant. C) phenotypes-25% normal and 75% albino; genotypes-25% homozygous dominant and 50% heterozygous and 25% homozygous recessive. D) phenotypes-75% normal and 25% albino; genotypes-25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.
Also known as the pneumotaxic center, this area allows for smooth transitions between inspiration and expiration.
A. Dorsal respiratory group B. Ventral respiratory group C. Medullary respiratory center D. Carotid body E. Pontine respiratory center