PNB 2274 EXAM 1 PRACTICE QUESTIONS AND ANSWER

PNB 2274 EXAM 1 PRACTICE QUESTIONS AND ANSWERS In the skull of a newborn baby, the space between the developing skull bones is known as a. Lacuna b. Aversion canals c. Fontanel d. Intramembranous canal e. Central canal - Ans:-c. Fontanel You recently identified a disorder in which the activity of osteoblasts exceeds the activity of osteoclasts. How will the properties of the long bone be affected? a. The bone would have a reduced inorganic content; as a result it would be weaker and more elastic. b. The bone would have an increased inorganic content; as a result it would be weaker and more elastic c. The bone would have a reduced inorganic content; as a result it would be tougher and less ductile. ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/18 d. The bone would have an increased inorganic content; as a result it would be tougher and less ductile e. The bone would have a reduced inorganic content; as a result it would sustain greater compressive forces - Ans:-d. The bone would have an increased inorganic content; as a result it would be tougher and less ductile The method of mammary gland secretion is: a. Apocrine b. Mesocrine c. Merocrine d. Fullcrine e. Holocrine - Ans:-a. Apocrine Mutation in connexin26 (Cx26) underlie a range of serious human pathologies. More recently, it was also reported that Cx26 hemichannels linked to keratitis-ichthyosis-deafness syndrome, are associated with disordered breathing in humans. Mutation in connexin26 most likely will disturb: a. Tight junctions b. Adhering junctions c. Gap junctions ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/18 d. Desmosomes - Ans:-c. Gap junctions Which of the following is TRUE? a. Homeostatic mechanisms work through positive feedback b. Homeostasis functions to ensure internal conditions fluctuate around a set-point c. Circadian thythms affect set points d. Both A and B is true e. Both B and C is true - Ans:-e. Both B and C is true How does PTH help increase the calcium ion concentration of the blood? a. PTH decreases urine calcium output b. PTH increases blood calcium levels by decreasing osteoclast activity c. PTH increases blood calcium levels by increasing osteoblast activity PTH increases calcium blood levels by increasing the rate of calcium uptake to osteocytes - Ans:-a. PTH decreases urine calcium output When doing a handstand, the stomach is ____ to the lungs. a. Inferior ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/18 b. Dorsal c. Superior d. Medial - Ans:-a. Inferior In a homeostatic system, an integrating center a. Is the disturbance or a change that sets the pathway in motion b. Evaluates incoming signals and compares it with the setpoint c. Is the minimum stimulus that must be achieved to return to the d. Is an electrical and/or chemical signal that travels to the effector - Ans:-b. Evaluates incoming signals and compares it with the setpoint Which of the following statements is TRUE about carriers?