which term refers to a phenomenon in which one gene produces multiple phenotypic effects (i.e. Alkaptonuria)?
a) codominance
b) pleiotropy
c) multiple alleles
d) polygenic inheritance
b) pleiotropy
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Membrane renewal vesicles are formed by
A) the endoplasmic reticulum. B) the Golgi apparatus. C) lysosomes. D) mitochondria. E) nucleoli.
Decreased blood calcium level would result in increased secretion of which hormone?
A) parathyroid hormone B) calcitonin C) growth hormone D) thyroid stimulating hormone E) cortisol
Which of the following is NOT a component of a negative feedback mechanism?
A. effector B. stabilizer C. control center D. receptor
Which of the following statements regarding regulation of local blood flow is true?
A. Increased metabolic rate in a tissue increases capillary blood flow into the tissue. B. Blood flow through capillaries is continuous. C. Contraction of precapillary sphincters will increase blood flow to a capillary bed. D. Increased levels of carbon dioxide increase the contraction of precapillary sphincters. E. Tissue need for oxygen and amino acids will cause precapillary sphincters to contract.