During inhalation/inspiration, the diaphragm contracts and the alveolar pressure is less than atmospheric pressure; during exhalation/expiration, the diaphragm relaxes and the alveolar pressure is greater than atmospheric pressure.
Answer the following statement true (T) or false (F)
True
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Large wrinkle-like folds in the stomach lining, present when the stomach is empty, that allow for expansion when the stomach is filling are called ________
A) villi B) haustra C) microvilli D) rugae
Answer the following statements true (T) or false (F)
1. The terms integument, skin, and cutaneous membrane refer to the same structure. 2. Serous membranes are made up of columnar epithelial tissue attached to a basement membrane. 3. Pleurisy and peritonitis are both inflammations of a serous membrane. 4. Mucus membranes are all made of squamous epithelial tissue attached to a basement membrane. 5. The eyelid is an example of a mucocutaneous junction.
Answer the following statements true (T) or false (F)
1. The pelvis is an expansion of the upper end of the ureter. 2. The pelvis is the triangular division of the medulla of the kidney. 3. Calyces are part of the renal pyramids. 4. The papillae are a division of the renal pelvis. 5. The calyces are part of the renal pelvis.
Nervous stimulation of skeletal muscle results in a wave of depolarization along the plasma membrane. This electrical signal is carried into the interior of the muscle cell via the membranes of the:
a. Intercalated disks b. Nuclear envelope c. Sarcomere d. Sarcoplasmic reticulum e. T-tubules