These muscles extend from a superior rib inferomedially to the adjacent inferior rib. They elevate the ribs upon contraction, thereby increasing the transverse dimensions of the thoracic cavity during inhalation.
A. Internal intercostals
B. External intercostals
C. Scalenes
D. Transversus thoracis
E. Serratus posterior inferior
Answer: B
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Which structure connects the third and fourth ventricles?
A) Cerebral aqueduct B) Arachnoid villus C) Spinal canal D) Apertures
Which of the following is incorrect pertaining to the inguinal ligament?
A) It is composed of the aponeurotic fibers of the external oblique muscle. B) It extends primarily between the anterior superior iliac spine and the pubic tubercle. C) It is often perforated by a direct inguinal hernia. D) It has fibers that cross the midline to help form the reflected inguinal ligament. E) It is paralleled deeply by the iliopubic tract, which is composed of transversalis fascia.
Why might the drug orlistat, which blocks pancreatic lipase, helps an individual lose weight?
a) Pancreatic lipase is responsible for slowing down the body's overall metabolic rate. By blocking pancreatic lipase, the body will increase in metabolic activity, which potentially could lead to weight loss. b) Pancreatic lipase catalyzes the reaction that breaks the remaining polysaccharides into oligosaccharides but not into individual sugars, blocking them from being absorbed, potentially leading to weight loss. c) If pancreatic lipase is blocked, fat-soluble vitamins will not be capable of being absorbed by diffusion in the small intestines, potentially leading to weight loss. d) Blocking pancreatic lipase will, in turn,, block the chemical digestion and absorption of lipids, potentially leading to weight loss.
Many bones of the skull form by which type of ossification?
a. Incomplete b. Endochondral c. Appositional d. Intramembranous