Which sequence presents the five steps of digestion in an upper-level animal in the proper order?
a. mechanical processing, secretion of enzymes, absorption, enzymatic hydrolysis, elimination
b. mechanical processing, absorption, secretion of enzymes, enzymatic hydrolysis, elimination
c. mechanical processing, secretion of enzymes, enzymatic hydrolysis, absorption, elimination
d. absorption, enzymatic hydrolysis, mechanical processing, secretion of enzymes, elimination
Answer: c. mechanical processing, secretion of enzymes, enzymatic hydrolysis, absorption, elimination
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In a DNA profile analysis using two loci, the chance of a match between two unrelated individuals at one locus is 1 in 400, and 1 in 1000 at the second locus. Therefore, the overall probability that two unrelated individuals will match at both loci is ____________________
Fill in the blank(s) with correct word
Which pair of organisms would be classified as prokaryotes?
a. Fungi and Plantae b. Bacteria, Archaea and Fungi c. Animalia and Plantae d. Fungi, Plantae and Animalia e. Bacteria and Archaea
Sometimes postmenopausal women are given a prescription for which of the following to help them maintain their bone calcium?
A) parathyroid hormone B) thyroid hormone C) calcitonin D) insulin
Which of the following statements correctly describe(s) T tubules and their role in conducting action potentials in muscle cells?
A. T tubules carry action potentials into the interior of the muscle cell via voltage-gated Na+ and K+ channels. B. T tubules lack the voltage-gated Na+ and K+ channels that are present in the plasma membrane. C. T tubules are infoldings of the plasma membrane that encircle the myofibrils and are in contact with the sarcoplasmic reticulum. D. Without T tubules, the muscle cell would not be able to contract. E. T tubules are extensions of the sarcoplasmic reticulum that are in contact with the plasma membrane. F. T tubules have receptor proteins that bind neurotransmitters released from the synaptic terminal of the motor neuron.