Delta is a type of fibre that transmits signals that are interpreted and perceived as pain.
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Delta fibres</h3>
A delta fibres (also known as A fibres) are a type of sensory fibre. They respond to cold and pressure stimuli, and as nociceptors, their stimulation is perceived as fast/first pain input. Because they are thinly myelinated, they transmit impulses quicker than unmyelinated C fibres but slower than other, thicker myelinated "A" class fibres.
Structure
They have myelinated axons that are thin (2 to 5 m in diameter) and have a moderate conduction velocity, or speed at which a nerve signal moves (2 to 30 m/s). These nerve fibres make up the afferent portion of the reflex arc that causes the body to "draw away" from noxious stimuli because they are linked to acute (sharp) pain (e.g. retracting your hand away from a hot stove). A part of A fibres is also linked to pressure and temperature perception (also known as "cold receptors" in mammals). Contrarily, slow-conducting, unmyelinated C fibres convey gradual, scorching pain.
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Answer:
The correct answer is A.They secrete enzymes that break down dead matter or living organisms and absorb the released nutrients.
Explanation:
Most of the fungi are saprophytic which means they grow on dead and decaying organic matter like fallen trees, leaves, and dead animals and get nutrition by digesting these dead organic matter.
Fungi do not have stomach so they secrete enzymes like α- amylase, cellulase, xylanase, etc from their hyphae that helps in digesting complex organic molecules into simple form which can easily be absorbed by these fungus.
By decomposing these organic matter they recycle the nutrients and clean the pollution from the environment. So the correct answer is A.
Answer:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Explanation:
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