Which of the following tissues has the highest mitochondrial density (is the most oxygen-dependent)?
a. nervous tissue
b. muscle tissue
c. blood tissue
d. respiratory epithelial tissue
e. Mitochondrial density is consistent between tissues.
A
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The following is a list of the events that occur during a muscle contraction. What is the correct sequence of these events?
1. Myosin cross-bridges bind to the actin. 2. The free myosin head splits ATP. 3. Calcium ion is released from the sarcoplasmic reticulum. 4. The myosin head pivots toward the center of the sarcomere. 5. Calcium ion binds to troponin. 6. The myosin head binds an ATP molecule and detaches from the actin.
Which of the following statements concerning structures of the spinal cord is false?
A. The ventral root is formed by the axons of neurons in the lateral and anterior horns. B. The ventral root of the spinal cord conveys motor (efferent) nerve impulses away from the spinal cord. C. The dorsal and ventral roots unite to form spinal nerves. D. The posterior horn of the cord contains the cell bodies of motor neurons. E. The dorsal root of the spinal cord conveys sensory (afferent) nerve impulses to the spinal cord.
Which of the following would help a therapist document their work on a client?
a. HIPPA b. S.O.A.P. c. ICD-9-CM. d. HPI.
Autologous chondrocyte implantation involves
A. injection of cartilage cells that had been cultured. B. replacement of articular cartilage with polyethylene. C. joint replacement with metal and plastic. D. use of cadaver ligaments to repair a joint. E. fusion of bones in a joint.