Which type of tissue is responsible for contracting to produce movement in the body?
Muscle tissue
Connective tissue
Epithelial tissue
Nervous tissue
The Correct Answer is A
A. Muscle tissue: Muscle tissue is composed of cells (fibers) that have the unique ability to shorten or contract. This contraction generates the force required for body movement (skeletal muscle), pumping blood (cardiac muscle), and moving substances through hollow organs (smooth muscle).
B. Connective tissue: The primary function of connective tissue is to support, bind together, and protect tissues and organs (e.g., bone, cartilage, blood, and adipose tissue). It provides structure but does not generate active movement through contraction.
C. Epithelial tissue: Epithelial tissue forms the covering of all body surfaces, lines body cavities and hollow organs, and is the major tissue in glands. Its main functions are protection, secretion, absorption, and excretion.
D. Nervous tissue: Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities by transmitting electrical signals (impulses), not by physical contraction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Bladder control:Voluntary bladder and bowel control is mediated by the sacral nerves (S2-S4). A C5 injury severs the connection between the brain and the lower spinal cord, typically resulting in neurogenic bladder (loss of voluntary control).
B. Full hand dexterity:The nerves controlling the hands and fingers originate from the C8 and T1 levels. A C5 injury usually leaves the patient with shoulder and partial biceps control, but paralysis of the wrists and hands.
C. Ability to breathe independently:The diaphragm is innervated by the phrenic nerve, which originates from spinal roots C3, C4, and C5("C3, 4, 5 keep the diaphragm alive"). While a C5 injury may weaken respiratory effort (due to loss of intercostal muscles), the diaphragm usually remains functional, allowing independent breathing.
D. Ability to walk unaided:The muscles for walking are controlled by the lumbar and sacral spinal nerves. A cervical injury (C5) results in quadriplegia (tetraplegia), involving paralysis of both the trunk and legs.
Correct Answer is D
Explanation
A. Flat bones: Protect internal organs (e.g., skull, ribs, scapula). Not applicable to femur or humerus.
B. Irregular bones: Have complex shapes (e.g., vertebrae, facial bones). Not applicable.
C. Short bones: Cube-shaped bones of wrist and ankle (carpals, tarsals).
D. Long bones: The femur and humerus are classic long bones, characterized by a shaft (diaphysis) and two ends (epiphyses). They support weight and facilitate movement.
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