The correct answer is: C) secreting releasing and inhibiting factors into a tiny portal system.
Hypothalamus is part of the brain that consists of many nuclei and has the function to connect the nervous system to the endocrine system via the pituitary gland. Hypothalamus is linked with the anterior pituitary via hypothalamic–adenohypophyseal axis. Releasing hormones or factors produced in hypothalamic nuclei are first released from the prolongation of the hypothalamus and then into a tiny portal system called hypophyseal portal system. This system of blood vessels transports hormones to the anterior pituitary where they act on the secretion of adenohypophyseal hormones.
Answer:
a. a complete loss of voluntary movement
Explanation:
Spinal nerves serve as the paths of communication between the spinal cord and specific regions of the body. Roots refer to the bundles of axons that serve to connect each spinal nerve to a segment of the spinal cord via smaller bundles of axons called rootlets. The ventral root also called the anterior root and the associated rootlets contain axons of motor neurons.
These motor neurons of ventral root conduct nerve impulses from the CNS to effector organs. Muscles and glands are the effector organs. As these effector organs receive motor information, voluntary movements are generated. If the ventral root of the spinal nerve were cut, the effector organs will not get the motor information and no voluntary movements will be generated.
<span>One important mechanism of evolution, natural selection, </span>does<span> result in the evolution of improved abilities to survive and reproduce; however, this does not mean that evolution is progressive — for several reasons
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Even a country in which the birthrate and death rate are equal can experience population growth if it also has immigration.
- In evolutionary time, migration will often quickly converge gene frequencies among populations. Migration is a powerful mechanism for balancing the gene frequencies of subpopulations in a species in the absence of selection. Gene frequencies will eventually equalize if the migration rate is larger than zero.
- Migration refers to the movement of people, groups, or populations. Migration facilitates gene flow, or the transfer of genes from one population to another, in terms of genetics. Migration—or, to be more precise, gene flow—alone will quickly bring the gene frequencies of the two populations together if they initially had distinct gene frequencies and if selection is not at work.
Therefore, immigration is the correct answer.
Learn more about immigration:
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It is meant primarily to produce red blood cells.
