Which hormone(s) is/are released by the posterior pituitary?
A) Oxytocin
B) Thyroid-stimulating hormone
C) ACTH
D) Vasopressin (Antidiuretic hormone)
E) Both a and d.
Ans: E) Both a and d.
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In a cross section of the spinal cord, the peripheral white portion consists of __________ forming nerve tracts, and the central gray portion consists of __________, dendrites, and axons.
A) unmyelinated axons, neuron cell bodies B) myelinated axons, sensory receptors C) myelinated axons, neuron cell bodies D) all of the above
Which phrase below correctly describes metaphase?
A)The chromosomes in a sister chromatid begin to separate from one another B)The centromeres are positioned continually along the spindle C)Centrosomes are attached at the metaphase plate D)Sister chromatids are aligned at the metaphase plate
What action is most responsible for the resting membrane potential in cardiac muscle cells?
A. movement of K+ through voltage-gated K+ channels B. movement of Na+ through open Na+ channels C. movement of Ca2+ through voltage-gated Ca2+ channels. D. closing of Na+ and K+ voltage-gated channels
Muscle cells contain numerous __________ because of their high demand for ATP.
A. mitochondria B. endoplasmic reticula C. lysosomes D. nuclei E. Golgi complexes