Hormonal Responses To Exercise

Question 1

What are hormones secreted from

Answer 1

Endocrine glands

Question 2

Plasma glucose when fasting or during exercise maintained through four processes:

Answer 2

1.mobilization of glucose from liver glycogen stores
2.mobilizatkon of FFA from adipose tissue
3.gluconeogenesis from amino acids, lactic acid and glycerol.
4. Blocking the entry of glucose into cells

Question 3

Describe the thyroid hormone

Answer 3

1.Influences the number of receptors on the surface of a cell for other hormones to interact with

2.the affinity of the receptor for the hormone

Question 4

Describe growth hormone

Answer 4

Gh increases protein synthesis in muscle and long bone growth.

High dose leads to adverse affects rather than benefits.

Question 5

What is cortisol

Answer 5

Steroid hormone derived from cholesterol and secreted from the adrenal cortex

Question 6

What are catecholamines

Answer 6

1.secreted from the adrenal medulla
Epinephrine and norepinephrine.

Question 7

Endurance training and catecholmaines :

Answer 7

Endurance training causes a very rapid decrease in catecholamine responses to a fixed intensity exercise bout

Question 8

Catecholamine responses to supramaximal exercise in trained invdiduals:

Answer 8

Trained individuals have a greater capacity to increase catecholamines compared to untrained

Question 9

Glycogenolysis is related to exercise intensity

Answer 9

High intensity exercise results in greater and more rapid glycogen depletion

Question 10

What is the role of plasma epinephrine

Answer 10

Is a powerful stimulator of glycogenolysis

High intensity exercise results in greater increases in plasma epinephrine

Question 11

Describe the pancreas

Answer 11

1.Both exocrine and endocrine functions
2.secretes counter regulatory hormones from the islets of langerhams

Question 12

What is insulin

Answer 12

1.promotes the storage of glucose, amino acids and fats

Question 13

What is glucagon

Answer 13

1.Promotes the mobilization of fatty acids and glucose
2.stimulates gluconeogenisis in the liver

Question 14

Changes in plasma during exercise:

Answer 14

During moderate intensity exercise insulin conc can drop by 50%

This favours the mobilization of glucose from the liver and FFA from adipose tissue

Question 15

What are the effects of catecholamines on insulin and glucagon secretion

Answer 15

When plasma glucose is relatively constant the sns can modify hormone secretion.(sympathetic nervous system)