Water can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions
Several cells aid in maintaining and/or regulating the body temperature. Cells in the different system of the body including Sensors in the nervous system, hypothalamus in the CNS and sweat gland in the Endocrine system. Normal body temperature usually ranges at a set point from about 36.5 to 37.5 celsius.
When the body falls below or above this set points, several cells including those aforementioned aids to stabilize the body temperature back to its set point.
When there is a deviation from the set point, the sensors in the CNS and PNS send information to the hypothalamus which regulates temperature in the brain. Blood vessels then either constrict (if cold or below body temperature) to preserve heat) and the skeletal muscles contribute by helping the body to shriver in order to raise body temperature. Contrary, blood vessels will dilate if the body temperature has risen beyond 37.5 celsius. In this case, the sweat gland helps secrete sweat to help cool down the body.
Answer:
A typical neuron consists of a cell body (soma), dendrites, and a single axon. The soma is usually compact. The axon and dendrites are filaments that extrude from it. Dendrites typically branch profusely and extend a few hundred micrometers from the soma. The axon leaves the soma at a swelling called the axon hillock (<em><u>the axon hillock also has the greatest density of voltage-dependent sodium channels. This makes it the most easily excited part of the neuron and the spike initiation zone for the axon</u></em>) and it branches but usually maintains a constant diameter. At the farthest tip of the axon's branches are axon terminals, where the neuron can transmit a signal across the synapse to another cell.
<em>In general, dendrites receive the electrical signal from other neurons, and this signal is transmitted over long distances from the axon.</em>
Like all animal cells, the cell body of every neuron is enclosed by a plasma membrane, a bilayer of lipid molecules with many types of protein structures embedded in it. A lipid bilayer is a powerful electrical insulator, but in neurons, many of the protein structures embedded in the membrane are electrically active. These include ion channels that permit electrically charged ions to flow across the membrane and ion pumps that chemically transport ions from one side of the membrane to the other to generate the action potential that generates the electrical signal. They also have a highly developed synthetic apparatus for the production of neurotransmitters
Strengthening of trade winds and selection of crops.
T (time period) = t (times it took for oscillation)/ N (number of times it oscillated)
= 50/25 = 2
