Answer:
amino acids can build proteins!
I think the correct answer from the choices listed above is option A. Skin and nerve cells have different appearances and characteristics from each other, although they contain the same DNA because the genes expressed in inskin cells may not be expressed in nerve cells and vise versa.
Answer:Desde un punto de vista evolutivo y biológico, la función del cerebro como órgano, es ejercer un control centralizado sobre los demás órganos del cuerpo.
Explanation:
A watershed is land that contributes water<span> to a stream, river, lake, pond, wetland or other </span>body of water<span>. The boundary that separates one watershed from another, causing falling rain or melting snow or spring </span>water<span> to flow downhill in one direction or the other, is known as a “watershed divide”.
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Answer:
The two types of motor neurons perform different activities: The upper motor neuron excites or inhibits the activity of the lower motor neuron, but the lower motor neuron always is excitatory because its axon connects directly to the skeletal muscle fibers. The cell bodies of motor neurons and most interneurons involved in the innervations and control of limb and trunk muscles reside in the spinal cord anterior horn and the gray matter zone between the anterior horn and the posterior horn. The neurons that innervate the head and neck are located in the motor nuclei of cranial nerves and in the reticular formation. Motor neuron axons form two types of motor pathways: The direct pathways are responsible for conscious control of skeletal muscle activity; the undirect pathways are responsible for subconscious or unconscious control.
