Concept explainers
Introduction :
A muscle consists of groups of fibers or muscle cells that are bound together. Muscles are classified according to their structure and function. There are three types of muscles named smooth muscle, cardiac muscle, and skeletal muscle.
Answer to Problem 6STP
Correct answer :
The correct answer is option (A) in the heart.
Explanation of Solution
Explanation/justification for the correct answer :
Option (A) in the heart. In the given table the missing description of cardiac muscle is that it is found only in the heart. The involuntary muscle present only in the heart is known as cardiac muscle. So, this is the correct option.
Explanation for incorrect answer :
Option (B) in the kidneys. The muscles of the kidneys are smooth. Cardiac muscles are only found in the heart. So, this is an incorrect option.
Option (C) lining the blood vessels. Cardiac muscle cells are arranged in a network or web that allows the heart muscle to contract efficiently and rhythmically. Cardiac muscles are only found in the heart. So, this is an incorrect answer.
Option (D) lining the lymph vessels. Lymph vessels are made up of smooth muscle. This muscle is involuntary because it cannot be controlled consciously. So, this is an incorrect answer.
Chapter 34 Solutions
Biology Illinois Edition (Glencoe Science)
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