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What age group is mostly affected by scurvy?

Scurvy can affect individuals of any age, but it is most commonly seen in older adults, individuals with poor diets lacking in vitamin C, or those with certain medical conditions that affect nutrient absorption.


explain why hormones in the bloodstream are able only to affect target cells/organs and not other cells/organs?

Hormones in the bloodstream are able to affect target cells/organs and not other cells/organs because of selective permeability. This means that hormones are only able to pass through the cell membrane of certain cells and organs, and not through the cell membrane of other cells and organs. The cell membrane of the target cells and organs are specialized to allow the hormones to pass through, while the cell membrane of other cells and organs are not specialized and are therefore impermeable to the hormones. This is due to the presence of receptor proteins on the cell membrane of the target cells and organs. These receptor proteins can bind to the hormones and facilitate their entry into the cell. Since these receptor proteins are not present on the cell membrane of other cells and organs, the hormones are unable to bind to them and therefore unable to cross the cell membrane. In addition, hormones can be broken down by enzymes in the bloodstream, which means they can’t reach their target cells and organs if they are exposed to the enzymes. This further ensures that hormones only affect the target cells and organs, and not other cells and organs. In summary, hormones in the bloodstream are able to affect target cells and organs and not other cells and organs because of selective permeability and the presence of receptor proteins on the cell membrane of the target cells and organs. Other cells and organs do not have these specialized receptor proteins and therefore cannot be affected by the hormones.


What gland secretes hormones into the bloodstream to affect the sex organs?

The pituitary gland secretes hormones into the bloodstream to affect the sex organs. It releases the luteinizing hormone (LH) and follicle-stimulating hormone (FSH) that regulate the functioning of the testes and ovaries.


What food deficiency causes scurvy?

Scurvy is caused by a deficiency of vitamin C in the diet. Vitamin C is necessary for the body to make collagen, which is important for healthy skin, blood vessels, and connective tissues. Symptoms of scurvy include fatigue, weakness, swollen and bleeding gums, and joint pain.


Hormones affect specific tissues called?

Hormones affect specific tissues called target tissues or target cells. These tissues have receptors that bind to hormones, triggering a response or change in cellular activity.