Steroids, peptides, and nucleic acids are the three classes of hormones
Indicate whether this statement is true or false.
FALSE
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Action potentials in neurons in the inspiratory center of the medulla oblongata result in action potentials in the ________ nerves to the diaphragm, which in turn cause ________ of the muscle, resulting in a/an ________ in the volume of the thoracic cage
A. motor; contraction; decrease B. parasympathetic; contraction; decrease C. sympathetic; contraction; increase D. motor; contraction; increase E. sympathetic; relaxation; increase
What is the spheroidal stage of early prenatal development with about 16 to 64 cells called?
A. Zygote B. Embryo C. Blastomere D. Morula E. Blastocyst
What is the correct sequence for lacrimal fluid production and drainage?a: Tears disperse across the surface of the eye.b: Tears are produced by the lacrimal gland.c: Fluid drains through the nasolacrimal duct.d: Fluid enters the nasal cavity.e: Fluid enters the lacrimal canaliculi and collects in the lacrimal sac.
A. b, a, e, c, d B. b, a, c, d, e C. a, b, c, d, e D. c, a, d, b, e E. c, a, b, e, d
The single most abundant protein in the body is ________.
A) DNA B) hemoglobin C) collagen D) glucose