A display of the chromosomes of a somatic cell during metaphase of mitosis is the
A. karyotype.
B. autosome.
C. homolog.
D. locus.
E. genome.
A
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Thyroid hormone may increase cellular ATP production by binding to
A) the cytoplasm. B) the outer surface of the plasma membrane. C) the inner surface of the plasma membrane. D) the mitochondria. E) the vesicles.
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 endocrine system
A. secretes chemicals that reach their targets through the bloodstream. B. is isolated from the nervous system. C. releases neurotransmitters into ducts. D. communicates via frequency-modulated signals. E. contains organs called exocrine glands.
Eicosanoids are a family of ubiquitous, fatty-acid-derived, local chemical messengers
Indicate whether the statement is true or false.