Which of the following is NOT a function of the spinal cord?
a. It interprets the sensory nerve action potentials as sensations.
b. It carries motor nerve action potentials from the brain to the effectors.
c. It carries sensory nerve action potentials from the sensory receptors to the brain.
d. It serves as a reflex center.
Answer: a. It interprets the sensory nerve action potentials as sensations.
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A human mother’s genes seem to influence brain development while a human father’s genes seem to influence growth. What does this imply?
A. The mother imprints her brain development genes and the father imprints his growth genes. B. The mother imprints her growth genes and the father imprints his brain development genes. C. Mothers and fathers both imprint brain development genes. D. Brain development genes are present in the mitochondria, while growth genes are present in the nucleus. E. Brain development genes are on the X chromosome and growth genes are on the Y chromosome.
Paired homologous chromosomes are found at the spindle equator during
a. metaphase I. b. telophase I. c. prophase II. d. metaphase II. e. anaphase II.
The failure of chromosomes to separate during mitosis or meiosis is called
a. genetic displacement. b. trisomy. c. crossing over. d. nondisjunction. e. disjunction.
What is the purpose of vitamins in the human body?
A) Vitamins are sources of stored energy. B) Vitamins help enzymes function properly. C) Vitamins act as hormones that trigger cells to take up glucose. D) Vitamins are the basis of the plasma membrane.