The smallest metacarpal bone in a dog is called the ________________________________________
Fill in the blank(s) with correct word
dewclaw
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To synthesize thyroid hormones, iodine is attached to
A. the amino acid tryptophan. B. acetyl coenzyme A. C. cholesterol. D. the amino acid tyrosine. E. the amino acid phenylalanine.
Select the most correct statement
A) Organ systems can be composed of cells or tissues, but not both. B) The immune system is closely associated with the lymphatic system. C) Organ systems operate independently of each other to maintain life. D) The endocrine system is not a true structural organ system.
A connective tissue fiber refers to a(n) ________ and a muscle fiber refers to a/an ________.
A. entire cell; complex of macromolecules B. entire cell; part of a cell C. complex of macromolecules; entire cell D. entire cell; tissue E. complex of macromolecules; part of a cell
In single-unit smooth muscle, ________.
A. cells display pacemaker activity B. all cells receive direct autonomic stimulation C. cells do not respond to stretch D. norepinephrine binds to muscarinic receptors and closes K+ channels