Physiology Flashcards
Which of the following is NOT true of connective tissue?
A. It consists of few cells surrounded by fibers and a group substance.
B. It includes such diverse tissues as bone, cartilage, tendons,adipose, and loose connective tissue.
C. It connects and supports other tissues.
D. It forms the internal and external lining of many organs.
D. It forms the internal and external lining of many organs.
Which of the following is NOT an organ system?
A. Skeletal
B. Connective
C. Digestive
D. Nervous
B. Connective
The diaphragm
A. Is a mesentery.
B. Increases the surface area of the lungs.
C. Is part of the mammalian reproductive system.
D. Separates the thoracic and abdominal cavities in mammals.
D. Separates the thoracic and abdominal cavities in mammals.
The interstitial fluid of animals
A. Is the internal environment within cells.
B. Provides for the exchange of nutrients and waste between cells and blood.
C. Is composed of blood.
D. Is found at the major exchange areas in lungs, kidneys, and intestine.
B. Provides for the exchange of nutrients and waste between cells and blood.
Negative feedback circuits are
A. Mechanisms that maintain homeostasis.
B. Activated when a physiological variable deviates from a set point.
C. Analogous to a thermostat that controls room temperature.
D. All of the above.
D. All of the above
Enzyme that hydrolyzes peptide bonds, works in the stomach.
Pepsin
Hormone that stimulates secretion of gastric juices
Gastrin
Enzyme that begins digestion of starch in mouth
Salivary amylase
Enzymes specific for hydrolyzing disaccharides
Disaccharidases
Enzyme that hydrolyzes peptide bonds at amino end of polypeptide
Aminopeptidase
BMR
A. Stands for bottom metabolic rate.
B. Is higher for ectotherms than for endotherms.
C. Is higher per gram for smaller animals than for larger ones.
D. All of the above are correct.
C. Is higher per gram for smaller animals than for larger ones.
The energy content of fats
A. Is released by bile salts.
B. Is inversely related to body size.
C. Is approximately two times that of carbohydrate or protein.
D. Can reverse the effects of malnutrition.
C. Is approximately two times that of carbohydrate or protein.
Incomplete proteins are
A. Lacking in essential vitamins.
B. A cause of undernourishment.
C. Found in proper proportion in meat, eggs, and cheese.
D. Lacking in one or more essential amino acids.
D. Lacking in one or more essential amino acids.
Vitamins
A. May be produced by intestinal microorganisms.
B. Are constant from one species to the next.
C. Are toxic in excess because they are deposited in body fat.
D. Are inorganic nutrients, needed in small amounts, that usually function as cofactors.
A. May be produced by intestinal microorganisms.
Which of the following is most prevalent in animals with gastrovascular cavities?
A. Absorption or predigested nutrients
B. Extracellular digestion.
C. Intracellular digestion.
D. Filter feeding.
C. Intracellular digestion.
The acid pH of the stomach
A. Hydrolyzes proteins.
B. Is regulated by the release of gastrin.
C. Is neutralized by gastric juice.
D. Is produced by pepsin.
B. Is regulated by the release of gastrin.
Which of the following statements is NOT true?
A. The average human has enough stored glycogen to supply calories for several weeks.
B. Eating less and/or exercising more can result in weight loss.
C. Conversion of glucose and glycogen takes place in the liver.
D. Excessive calories are stored as fat, regardless of their food source.
A. The average human has enough stored glycogen to supply calories for several weeks.
Which of the following is NOT a common component of feces?
A. Intestinal bacteria
B. Cellulose
C. Bile salts
D. Undigested ingredients of food
C. Bile salts
A gastrovascular cavity
A. Is found in cnidarians and annelids.
B. Functions to pump fluids throughout the body.
C. Functions in both digestion and distribution of nutrients.
D. Involves all of the above.
C. Functions in both digestion and distribution of nutrients.
Which of the following is NOT A SIMILARITY between open and closed circulatory systems?
A. Some sort of pumping device helps to move blood through the body.
B. Some of the circulation of blood is a result of movements in the body.
C. The blood and interstial fluid are indistinguishable from each other.
D. All tissues come into close contact with the circulating body fluid so that the exchange of nutrients and wastes can take place.
C. The blood and interstial fluid are indistinguishable from each other.
In a system with double circulation,
A. Blood is pumped at two locations as it circulates through the body.
B. There is a countercurrent exchange within the gills.
C. There is no mixing of oxygenated and deoxygenated blood in the heart.
D. Blood is repumped after it returns from the capillary beds of the gas- exchange organ.
D. Blood is repumped after it returns from the capillary beds of the gas- exchange organ.
During diastole,
A. The atria fill with blood.
B. Blood flows passively into the ventricles.
C. The elastic recoil of the arteries maintains hydrostatic pressure on the blood.
D. All of the above.
D. All of the above.
An atrioventricular valve prevents the backflow or leakage of blood
A. From a ventricle into an atrium.
B. Between ventricles.
C. From the aorta into the left ventricle.
D. From the pulmonary vein into the right atrium.
A. From a ventricle into an atrium.
Heart beat is initiated by contraction of the
A. SA node
B. AV node
C. Right atrium
D. Myogenic cardiac muscle cells
A. SA node