Answer:
B.
Explanation:
When standing up straight, the top of your crutches should be about 1-2 inches below your armpits.
The handgrips of the crutches should be even with the top of your hip line.
Your elbows should be slightly bent when you hold the handgrips.
To avoid damage to the nerves and blood vessels in your armpits, your weight should rest on your hands, not on the underarm supports.
Delta is a type of fibre that transmits signals that are interpreted and perceived as pain.
<h3>
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.
Learn more about receptors here:-
brainly.com/question/14613585
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Answer:
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Answer:
Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.
the surroundings or conditions in which a person, animal, or plant lives or operates.
sources:https://www.google.com/search?q=what+is+enviorment&oq=what+is+enviorment&aqs=chrome..69i57j0l5.4423j0j7&sourceid=chrome&ie=UTF-8
