A product of the anterior pituitary gland that causes color changes in it's target cells is melanocyte stimulating hormone (MSH) .
Hence the correct answer is option D .
<h3>
What is the pituitary gland ? </h3>
Pituitary is known as the master gland of our body, because it controls and coordinates the development and functions of other endocrine glands. It is found in the base of the brain in a bony cavity called 'sella tursica' and is attached to the hypothalamus.
It has two parts - anterior pituitary ( also known as adenohypophysis) and posterior pituitary ( neurohypophysis).
<h3>
What is anterior pituitary?</h3>
The anterior pituitary has two parts para distalis and pars intermedia. Of this , FSH, LH, TSH, ACTH etc., is released by pars distalis, and the only hormone from pars intermedia is the MSH .
- FSH - Follicle Stimulating Hormone - Stimulates the growth of ovarian follicles for next menstrual cycle.
- LH - Luteinizing Hormone - Induces ovulation of fully mature follicles and maintains corpus luteum.
- TSH - Thyroid Stimulating Hormone - Stimulates secretions of Thyroid gland.
- MSH - Melanocyte stimulating hormone - acts on melanocytes ( cells with melanin, a pigment ) and regulates the pigmentation of the skin.
Hence from the above points ,we can conclude that MSH causes color changes in it's target cells.
So correct answer is option D .
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Answer:
Which nonspecific defense mechanism increases the resistance of cells to viral infection and slows the spread of disease?
the nonspecific defense mechanism that increases the resistance of cells to viral infection and slows the spread of disease is called phagocytic barrier
Explanation:
Phagocytic barrier helps to attack any foreign materials that enteiers the body system sych as bacteria, viruses among others.
Answer:
Using the host's cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle. Like the lytic cycle, in the lysogenic cycle the virus attaches to the host cell and injects its DNA.
Photosynthesis starts when a photon- a tiny packet of light is absorbing a molecule of chlorophyll.
Option (III) .Cephalization, the clustering of neurons and interneurons in the anterior part of the animal, is apparent in <u>Planaria.</u>
What is planaria?
- Planaria is a genus of planarians in the family Planariidae.
- When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual.
- Currently the genus Planaria is defined as freshwater triclads with oviducts that unite to form a common oviduct without embracing the bursa copulatrix and with an adenodactyl present in the male atrium.
- The testes occur along the whole body.
- Planaria originally have habitats in dark, murky water which results in such sensitivity .
- They are also sensitive to other stimuli such as chemical gradients, vibration, magnetic and electric fields .
- Their central nervous system includes the anterior (head, brain and eyes) and middle (abdominal trunk and pharynx).
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