Answer:
<h2>
Amount of urine and plasma osmolarity increases</h2>
Explanation:
Anti-diuretic hormone or ADH is the hormone produced by the posterior part of the pituitary glands when the osmoreceptors sense the low level of water in the body.
The ADH once released binds to the ADH receptors in the collecting tubules which are usually permeable to water. ADH causes the opening of the aquaporins II in the collecting tubules which causes the reabsorption of water back in the blood.
If ADH amount decreases then the water is nor re-absorbed in the tubules and thus is excreted out with the urine causing the production of increased concentration of urine.
Thus, Amount of urine and plasma osmolarity increases is the correct answer.
Answer:
d. Estrogen will bind to a receptor protein that enters the nucleus and activates specific genes.
Explanation:
Estrogens are small lipophilic molecules synthesized from cholesterol. This steroid hormone (estrogen) is able to directly enter into the cell nucleus to bind with their corresponding receptors. Subsequently, estrogen-receptor binding stimulates these receptors to form dimeric structures that bind to DNA and thus activate gene expression. Estrogen receptors interact with DNA and activate gene expression through zinc finger domains composed of four (4) cysteine residues surrounding a zinc atom.
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Answer;
-Organelles must work together and their
activities must be coordinated
Explanation;
Eukaryotic cells contains membrane bound organelles unlike proteins which are specialized to specific functions inside the cells. Such organelles include; mitochondria, lysosomes, golgi apparatus, etc.
These organelles are bound inside cell to make it more efficient for the cell to carry all its functions with each organelle specializing in z specific function.
All the organelles work together and their activities must be coordinated to enhance smooth running of activities inside a cell.
