Hormones in Plants and Animals.

[vlc1500]

Hi, im having trouble with a question.

Both plants and animals
a) have special tissues or glands for producing hormones.
b) have some hormones involved in the control of growth and development.
c) cease producing hormones at sexual maturity
d. use their vascular systems to transmit essentially all of their hormones within their bodies
e) two of the above are true

[asutoshsahu]

(a) and (b) are true i.e choice e

[vlc1500]

Hi, i got just one more question

Which of the following statements about hormones is false?
a. Hormones are broadcast only to specific target cells.
b. Hormones are secreted in minute quantities.
c. hormones generally have longer lasting effects than nervous impulses.
d.Hormoes are slower acting than nervous impulses
e. Hormonal Systems occur in both plants and animals.

[MrMistery]

a

[blazblazni]

well a) is kind ot true as well. Only the cells with the appropriate receptors can recieve hormones (target cells) so they are broadcast to only specific cells. That is my opinion anyway.

[sachin]

well a) is kind ot true as well. Only the cells with the appropriate receptors can recieve hormones (target cells) so they are broadcast to only specific cells. That is my opinion anyway.

Me too.... Hormones affect on specific cells not all....

eg FSH.... to gonads.... not to Urinary system...
ADH ..... to Urinary system... not to Gonads...

[Dr.Stein]

C

Because hormone is secreted in pulsatory method or when there is a signal/order to secrete, then the effect only can be seen/felt when the hormone is around.

After some period, the hormone will be inactivated in liver to anticipate excessive endogenous hormone and too much effect/expression.

[Doc44]

Hormones when secreated go everwhere.... not just to a specific cell or tissue, but specific hormones influence specific target cells or tissues. FSH affects graffin follicles not melanocytes.

Doc44

What is an auxin?

[sachin]

Auxin is plant growth hormone...

[Doc44]

Do plants have auxins and hormones?

Doc44

A rose by another name with still stick you finger.

[Linn]

Yes
Auxins are plant hormones which regulate growth.
as pointed out by Sachin.

Also with plants, how much hormone released results in different effects.
For example increase or inhibit growth..

[sachin]

ANd May be species dependant...