Human Endocrine

Question 1

State the Characteristics of the type of glands that belong to the Endocrine system

Answer 1

-It releases hormones directly into the blood and it’s ducts

Question 2

Describe the interaction between the adrenal glands and the Kidney in maintaining homeostasis when salt levels in the blood is low

Answer 2

-low salt levels are detected by receptor cells in the kidney
-Adrenal glands are stimulated,
To secrete
-more Aldosterone
-which stimulates the renal tubules, to be more permeable to salt

Question 3

Explain the effect that a secretion of the pituitary gland will have on the Kidney when a person experiences dehydration

Answer 3

-The secretion of ADH
-will increase
-which will increase permeability
-of the renal tubules in kidney
- so more water is absorbed

Question 4

Name the disorder that will results when thyroid overstimulated and becomes enlarged

Answer 4

Goitre

Question 5

The Hormone that is expected to be high in the blood of the person with the disorder Goitre

Answer 5

Thyroid stimulating hormone (TSH)

Question 6

Hormone secreted by the pituitary gland that stimulates growth of a person

Answer 6

Growth Hormone (GH)

Question 7

Name the gland that secretes a hormone responsible for reducing glucose levels in the blood

Answer 7

Pancreas /islets of langerhans

Question 8

Name the the gland that secretes a hormone responsible for initiating puberty in males

Answer 8

Testes

Question 9

Name the gland that secretes a hormone responsible for controlling the metabolic rate

Answer 9

Thyroid gland

Question 10

What is a hormone

Answer 10

A regulatory substance in the body that stimulates cells to bring about change

Question 11

Explain how a lack of insulin affects blood glucose levels

Answer 11

-Excess glucose cannot be converted to glycogen in the liver
-thus, the glucose level in the blood remains above normal

Question 12

The Hormones that can be directly or indirectly affect blood glucose levels

Answer 12

-Thyroxin
-Adrenalin
-Glucagon

Question 13

Two functions of Thyroxin

Answer 13

-Controls metabolism
-influences heart rate

Question 14

Describe the Negative Feedback Mechanism that operates when the level of Thyroxin is higher than normal

Answer 14

-High levels of Thyroxin is detected
-Which leads to a decrease
-in the secretion of TSH
-activity of thyroid is slowed down