The striations in striated muscle correspond with actual molecular structures. Which of the following is the Z disk?
A) a band where only actin myofilaments are found
B) a band where only myosin myofilaments are found
C) an attachment point for actin myofilaments
D) an attachment point for myosin myofilaments
Answer: C) an attachment point for actin myofilaments
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A. Circular folds (plicae circulares) B. Intestinal length C. Microvilli D. Villi E. Rugae
Which is characteristic of cartilage connective tissue?
A. Matrix of protein fibers B. Cells called chondrocytes C. Gel-like ground substance D. Avascular E. All of the choices are correct.
A football player can hear his coach's voice above the noise of the crowd and can sense an opponent about to run him down. These abilities are due to the action of what part of the brain?
A. Pons B. Epithalamus C. Pineal body D. Thalamus E. Hypothalamus
The ________ gland is larger in children because they are exposed to many new infections.
A. thymus B. thyroid C. thalamus D. tinnitus