The muscle fascicle arrangement that is wider in the center and tapered at each end is properly called:
a. convergent
b. parallel
c. fusiform
d. multipennate
Answer: c. fusiform
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A group of rats are bred in a laboratory to study muscle function. This group possesses a genetic defect that causes the myosin heads to bind ADP irreversibly. The rats are entirely paralyzed. Which of the following correctly explains the impact of the defect on the muscle?
A. Because ADP is permanently bound, the myosin heads can never bind to the actin binding sites of the thin filament. B. ATP won't bind to the myosin heads, preventing the actin binding site of the thick filament from being revealed. C. ATP won't bind to the myosin heads, causing the thin filament to be constantly pulled in the power stroke of contraction. D. Because ADP is permanently bound, the myosin heads will be irreversibly cross-bridged with the actin binding sites of the thin filament.
A dead human body has been discovered in the woods near your home. No, you are not a homicide suspect; rather you are an expert hematologist, and the body is still warm. Implausibly, this adult corpse has no gender cues (no sexual organs, and skeletal features that are in between those expected for males or females). How can you assist the detectives in determining the gender of this person,
using the hematology lab in your garage? What will be an ideal response?
During systemic gas exchange, oxygen diffuses from the blood to the tissues and carbon dioxide diffuses from the tissues to the blood.
Answer the following statement true (T) or false (F)
The triceps brachii muscle inserts on the ________.
Fill in the blank(s) with the appropriate word(s).