BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 28, Problem 2SA

_________ allow cardiac muscle cells to contract in unison.

a. Tight junctions c. Gap junctions
b. Adhering junctions d. all of the above
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Cardiomyocytes are similar to skeletal muscle because: a. they beat involuntarily b. they are used for weight lifting c. they pulse rhythmically d. they are striated
1. The tunica media of blood vessels are composed of _____ that are interposed betweenthe smooth muscle cells.A. Elastin B. reticular fibers C. collagen fibers D. proteoglycans 2.Tunica adventitia in veins provides ____.A. structural stability B. collagen and elastic fibersC. intercellular clefts D. primary site of WBC3. Which is a characteristic of lymph?A. has low protein content B. moves from the heartC. has complete blood cells D. has more lipid and protein content\ 4. Cell-mediated immune response includes the following except to ______.A. activate B lymphocyte B. provide specific immune protectionC. secrete antibodies D. involve T lymphocytes 5. Which of the following is NOT under the secondary lymphatic organ?A. spleen B. lymph nodes C. lymphatic nodules D. thymus
This diagram shows a _______ and the green things being released into the space are _____. A. cardiac pace maker cell; calcium B. sarcoplasmic reticulum; calcium C. synapse; Sodium ions D. neuromuscular junction; neurotransmitters
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