The reason why the animal that has been struck by the arrow
goes limp and quickly suffocates because the acetylcholine receptor sites are
blocked and this was made possible because of the drug curare they use in
poisoning the top of the arrows.
The brain loses 5-10 percent of its weight between the ages 20 & 90.
<span>The
peripheral nervous system (PNS) are all neurons located outside the brain and
spinal cord (which is the central nervous system [CNS]). There are two types of
peripheral nervous system: sensory (afferent) neurons and motor (efferent)
neurons. The former carries bits of information from the sense organs (touch,
smell, taste, hearing, and sight) around the body to the brain and spinal cord,
while the latter transports messages from the central nervous system (brain and
spinal cord to the muscles and glands.</span>
Answer:
The arc is 6.4 units long.
Explanation:
For a circle of radius R, the circumference is given by:
C = 2*pi*R
If we have a section of this circle defined by an angle θ (such that this section makes an arc), the length of that arc is:
A = (θ/360°)*2*pi*R
and 2*pi*R is the circumference, then we can write the length of the arc as:
A = (θ/360°)*C
qsIn this case, we know that the circumference is equal to 8 units, and the arc has an angle of 288°
Then the length of that arc is:
A = (288°/360°)*C = (288°/360°)*8 = 6.4
The arc is 6.4 units long.
