Which type of tissue is specialized for transmitting electrical impulses?
Epithelial tissue
Nervous tissue
Muscle tissue
Connective tissue
The Correct Answer is B
A. Epithelial tissue: Epithelial tissue covers body surfaces and lines cavities. It is specialized for protection, secretion, and absorption, not electrical transmission.
B. Nervous tissue: Nervous tissue consists of neurons, which are highly specialized cells capable of generating and conducting electrical signals (action potentials) to communicate information throughout the body.
C. Muscle tissue: While muscle tissue is "excitable" and can conduct an electrical signal along its membrane to trigger contraction, its primary physiological specialization is contraction/movement, not the transmission of information.
D. Connective tissue: Connective tissue provides structural support, transport (blood), and energy storage (fat). It does not conduct electrical impulses.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Osteocyte; maintaining bone tissue:Osteocytes are mature bone cells embedded within the bone matrix. Their primary role is to maintain the mineral concentration of the matrix and communicate mechanical stress to other cells, but they do not primarily break down or build bone mass.
B. Osteoclast; breaking down bone tissue:Osteoclasts are large, multinucleated cells responsible for resorption-the process of breaking down bone tissue to release minerals (like calcium) into the blood. In osteoporosis, osteoclast activity often outpaces osteoblast activity, leading to net bone loss.
C. Chondrocyte; forming cartilage:Chondrocytes are the cells found in cartilage, not bone. They are responsible for producing the cartilaginous matrix (collagen and proteoglycans).
D. Osteoblast; forming new bone tissue:Osteoblasts are the "builders." They synthesize the bone matrix (collagen) and coordinate the mineralization process. While essential for health, the question specifically asked for the cell responsible for resorption.
Correct Answer is B
Explanation
A. Distal:Distal means farther from the point of attachment or farther from the trunk/center of the body (used for limbs). It does not indicate “closer to the head.”
B. Superior: Superior (also called cranial) means toward the head or upper part of a structure - i.e., closer to the head.
C. Inferior:Inferior means below or toward the feet - farther from the head. It is the opposite of superior.
D. Proximal:Proximal means nearer to the point of attachment to the trunk or nearer to the origin of a structure (used for limbs). It does not mean closer to the head unless the trunk/attachment happens to be superior, so this term is not the correct general term for “closer to the head.”
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