A mutation occurs that prevents the formation of intercalated disks. Which of the following muscular structures will be directly affected?
A. The heart
B. The stomach and intestines
C. The tongue
D. The legs
Answer: A
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Which statement is not correct?
a. Normally the effective plasma concentration of a hormone is regulated by appropriate adjustments in the rate of its secretion. b. In order to maintain homeostasis, the rate of hormone secretion remains constant. c. All hormones are regulated through negative feedback controls. d. Neuroendocrine reflexes produce a sudden increase in hormone secretion in response to a specific, usually external, stimulus. e. Some organs have endocrine and exocrine functions.
The __________ consists of the brain and spinal cord.
A. central nervous system B. peripheral nervous system C. all of the above
What varies from one isotope of an element to another isotope of the same element?
A) atomic number B) mass number C) number of protons D) both the atomic number and the number of protons
Which statement regarding age as a predisposing factor is false?
A. Children are more susceptible to diseases than adults because of their age. B. Children and the elderly are more susceptible to disease due to age. C. This predisposing factor can be controlled by an individual. D. As people live longer they become more susceptible to disease.