An 8-year-old boy is brought to the endocrinologist for testing. He is already as tall as an adult man. His muscles are well developed, and he has little body fat despite eating huge amounts of food. Blood work shows elevated levels of glucose
The endocrinologist should suspect
A) elevated parathyroid hormone levels.
B) decreased thyroxine levels.
C) elevated growth hormone levels.
D) elevated estrogen levels.
E) elevated testosterone levels.
C
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Communication within and between cells of an embryo can include all of the following EXCEPT _____
A) increased concentration of signaling molecules B) changes in binding to regulatory sequences C) changes in gene transcription D) changes in gene sequences
Signals are sent from one neuron to another at a synapse, where vesicles release molecules of ________ that travel to the postsynaptic cell
a. sodium ions b. calcium ions c. neurotransmitter d. potassium ions
Long term, heavy drinking can lead to ____, a disease characterized by inflammation and destruction of the liver
a. hepatoblastoma b. gall stones c. fatty liver disease d. jaundice e. hepatitis
Which term refers to duplication of the complete set of chromosomes in an organism's cell, followed by the separation of the duplicated chromosomes into two new cells?
a. zygote formation b. mitotic cell division c. binary fission d. meiotic cell division