Increased levels of carbon dioxide in the blood will result in
A) decreased blood flow to the lungs.
B) decreased parasympathetic stimulation of the heart.
C) decreased cardiac output.
D) decreased heart rate.
E) All of the answers are correct.
B) decreased parasympathetic stimulation of the heart.
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The defecation reflex
a. is initiated when mass movements force fecal material into the rectum, stimulating stretch receptors in the rectal wall. b. involves relaxation of the internal anal sphincter and contraction of the sigmoid colon and rectum. c. can be overridden by voluntary contraction of the external anal sphincter. d. both (a) and (b) above. e. all of these answers.
You have landed a job in a vet clinic that specialized in cardiovascular problems in cats and dogs. You and the vet are looking at an abnormal electrocardiogram, and you suggest it is due to the absence of ion channels in cells that produce the atrioventricular (AV) node delay. If you are right that depolarization spreads rapidly through the conducting system with no AV node delay, what symptoms would you expect to see?
A. Decreased end-diastolic volume leading to decreased cardiac output B. An increase in heart rate C. No depolarization of the atria D. Left and right ventricles won't contract at the same time
All of the following are regions of the adrenal cortex EXCEPT the ________
A) zona reticularis B) zona glomerulosa C) zona fasciculata D) zona medulla
Large carbohydrates are formed from smaller units called
A. lipids. B. phosphate groups. C. amino acids. D. monosaccharides. E. steroids.