Which is not true regarding ligaments?
A. Intracapsular ligaments are within the articular capsule.
B. Ligaments are composed of dense regular connective tissue.
C. Extrinsic ligaments are physically separate from the articular capsule.
D. Intrinsic ligaments are thickenings of the articular cartilage.
E. Extracapsular ligaments are outside the articular capsule.
D
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Positive inotropic drugs such as glucagon and thyroid hormone cause
A) decreased heart rate. B) increased heart rate. C) increased contractility. D) decreased contractility. E) asystole.
Compared with skeletal muscle, which of the following is not true of smooth muscle?
A. There is one nucleus per cell. B. There are no striations. C. There are no Z discs. D. It has an ability to regenerate through mitosis. E. There are more T tubules.
Intact skin provides protection because
A. the skin enhances water loss from the body. B. macrophages roam in the epidermis. C. its secretions keep the skin slightly alkaline. D. the skin contains components of the excretory system. E. it forms a physical barrier against the entry of microbes.
Which of the following does not play a role in thermoregulation of the testes?
A) The dartos muscle B) The cremaster muscle C) The pampiniform plexus of veins D) The bulbospongiosus muscle E) The countercurrent heat exchanger