Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Transcribed Image Text:Which of the following statements regarding heart valves is NOT true?
a) They are flaplike structures.
Ob) There are four valves in the heart.
Oc) They prevent backflow of blood.
d) They must remain tightly closed in order to work properly.
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- Local control of blood flow through a tissue a) maintains a blood flow independent of changes in blood pressure b) is controlled via a relaxation or contraction of precapillary sphincters c) is controlled by changes in oxygen levels in the tissue d) is controlled by changes in carbon dioxide levels in the tissuearrow_forwardWhich nerve(s) transmit an action potential from the brain to the heart? a) the vagus nerve only b) the vagus and glossopharyngeal nerves c) the vagus and phrenic nerves d) the phrenic and glossopharyngeal nerves e) the phrenic nerve onlyarrow_forwardWhich of the following forms of shock occurs as a result of expansion of the vascular compartment? Question 17 options: a) Cardiogenic b) Neurogenic c) Hypovolemic d) Obstructivearrow_forward
- Which of the following changes happen at birth or a couple hours afterward? A) The connection between the right and left ventricles gets sealed. B) The connection between the left pulmonary artery and aorta gets sealed. C) The connection between the right ventricle and pulmonary trunk gets sealed. D) The connection between the left atrium and left ventricles gets sealed.arrow_forward1) Which of the events below occurs when the semilunar valves are open? A) Ventricles are in diastole. B) Blood leaves pulmonary arteries and the aorta. CAV valves are closed. D) Both A & B E.) None of the abovearrow_forwardArrange the following in the ascending order of individual resistance from the lowest to the highest 1. aorta 2. artery 3.arteriole 4. capillary a) 4,3,2,1 b) 3,4,1,2 c) 2,3,4,1 d) 1,2,3,4arrow_forward
- An increase in mean blood pressure may be due to? a) an increase in heart rate b) an increase in peripheral resistance c) an increase in stroke volumearrow_forward12arrow_forwardA patient who has recently had a myocardial infarction (MI) has started therapy with a beta blocker. The nurse explains that the main purpose of the beta blocker for this patient is to a) cause vasodilation of the coronary arteries.b) prevent hypertension.c) increase conduction through the SA node.d) protect the heart from circulating catecholaminesarrow_forward
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