The type of muscle tissue present in the walls of blood vessels and intestine is:
A. Voluntary muscle
B. Cardiac muscle
C. Skeletal muscle
D. Smooth muscle
Answer: Option D
Solution (By JKExamLibrary)
Smooth muscle is non-striated, spindle-shaped, involuntary muscle found in the walls of hollow organs like intestines, blood vessels, uterus, and bladder. It controls peristalsis, vasoconstriction, and other autonomic functions. Skeletal muscle is voluntary and striated, cardiac muscle is striated but involuntary.
In plant physiology, the 'Guttation' is the process by which water is exuded from the plant in liquid form. This typically occurs from specialized structures at the leaf margins called:
Explanation:
Guttation is the exudation of water in liquid form from the intact, uninjured surfaces of plants, typically from the margins or tips of leaves. This occurs when root pressure is high (usually at night or early morning when transpiration is low and soil moisture is high) and the rate of water absorption exceeds the rate of transpiration. The water is forced out through specialized structures called hydathodes (or water stomata), which are located at the leaf margins and lack the mechanism to close like regular stomata.
Consider the following statements about the pancreas:
1. It has both endocrine and exocrine functions.
2. Alpha cells secrete insulin.
3. Beta cells secrete glucagon.
Which of the above is/are correct?
Explanation:
A gomphosis is a specialized fibrous joint where a peg-like tooth fits into a socket in the jawbone, connected by the periodontal ligament. Sutures are between skull bones, synovial are movable, cartilaginous slightly movable.
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