The fluid that accumulates in tissues causing edema when lymphatic drainage is impaired is:
A. Plasma
B. Synovial fluid
C. Lymph
D. Serum
Answer: Option C
Solution (By JKExamLibrary)
Lymph is interstitial fluid that has entered lymphatic capillaries. When lymph vessels are blocked (e.g., filariasis), lymph accumulates, causing swelling (lymphedema). Plasma is blood fluid, synovial in joints, serum is plasma without clotting factors.
Explanation:
The cochlea, a spiral-shaped organ in the inner ear, contains the organ of Corti with hair cells that transduce mechanical vibrations into electrical impulses. The eardrum and ossicles conduct sound to the cochlea. The auditory nerve transmits impulses to the brain. Thus, transduction occurs in the cochlea.
Explanation:
Ethylene is a gaseous plant hormone that is widely known for its role in promoting the ripening of fruits. It increases the respiration rate during fruit ripening (climacteric rise) and breaks down cell walls, converting starches to sugars, making the fruit softer and sweeter. It is also involved in leaf abscission and the triple response in seedlings.
Explanation:
Acetylcholine is an excitatory neurotransmitter at neuromuscular junctions and many CNS synapses. GABA and glycine are generally inhibitory in the CNS. Serotonin modulates mood but can have inhibitory or excitatory effects depending on receptors. Neurotransmitters are chemical messengers released from synaptic vesicles into the synaptic cleft to bind to postsynaptic receptors.
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