During an unforced exhalation/expiration, which would NOT be true? A) Intrapleur

Question

During an unforced exhalation/expiration, which would NOT be true? A) Intrapleural pressure becomes less negative B) Alveolar pressure becomes less negative, B) Alveolar pressure is greater than atmospheric pressure. C) The diaphragm relaxes. D) Kung volume decreases. E) Intrapleural pressure is greater than alveolar pressure Which of the following does NOT contribute to increased stroke volume during exercise? A) increased length of filling time during diastole B) increased contractility of cardiac muse C) increased end-diastolic volume D) increased venous return E) Increased sympathetic stimulation of ventricular muscle. Jane donates a pin! of blood to a blood bank A few minutes later, which of the following would be increased compared to pre-donation values A) her heart rate and total peripheral resistance B) her stroke volume and total peripheral resistance Q the percentage of her cardiac output flowing to her kidneys D) the blood flow to her brain E) her heart rate and mean arterial pressure Distinguishing characteristics of veins include which of the following? A) Veins have walls consisting only of endothelial cells. B) All veins have valves to ensure one-way movement of blood Q All veins carry deoxygenated blood D) All veins carry blood toward the heart E) All veins have thick, clastic walls Which is an example of long-loop negative feedback? A) stimulation of thyroid-stimulating hormone (TSH) release by thyrotropin-releasing hormone (TRH) B) inhibition of growth hormone-releasing hormone (GHRH) release by insulin-like growth factor- 1 C) inhibition of growth hormone-releasing hormone (GHRH) release by growth hormone (GH) D) inhibition of corticotropin-releasing hormone by adrenocorticotropic hormone (ACTH) E) simulation of dopamine release by prolactin

Explanation / Answer

17-E because the intrapleural pressure is always lower than the alveolar pressure during normal expiration.

18-A because the increased stroke volume during exercise results in lower heart rate wich results in increased diastolic volume which ultimately leads to more volume of blood ejected.

19-C this happens because of the change in the arterial and venous resistance that redistribute the blood volume and change the pressure gradients throughout the vasculature

20- D because the veins carry the deoxygenated blood from the tissues back to the heart for oxygenation.

21- D

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