Engocrine System

Question 1

What is the endocrine system

Answer 1

response to resistance training by secreting a multitude of hormones from across the endocrine system and aimed at virtually every tissue/cell type in the body.
Helps restore Homeostasis

Question 2

Autocrine

Answer 2

When the hormone acts on the cell that produced it

Question 3

Paracrine

Answer 3

When the hormone acts on the adjacent cells to the production cells

Question 4

Importance of systemic changes

Answer 4

• Blood flow redistribution during exercise , more blood delivered to working muscles
• Exercise can alter the concentration and sensitivity of receptors to their specified hormone

Question 5

Hormones released during resistance training

Answer 5

Adrenaline
Noradrenaline
Growth hormone
Testosterone

Question 6

Hormones released after resistance training

Answer 6

Growth hormone
Testosterone
IGF-1 - Insulin (nutrition mediated)

Question 7

TESTOSTERONE

males

Answer 7

95% of testosterone produced in testes and 5% produced by adrenals

Question 8

How long does steroidogenesis take

Answer 8

35 minutes

Question 9

testosterone response to resistance exercise

Answer 9

Both genders show increase

- Females also seem to show increase in estrogen post exercise – Return to baseline in 1 h

Question 10

Testosterone on muscle tissue Acute effects

Answer 10

• Stimulates production of neurotransmitters = force
• Facilitates calcium release from sarcolemma = force
• Increases muscle protein synthesis

Question 11

what glands secretes growth Hormone

Answer 11

pituitary gland

Question 12

Role of growth hormones

Answer 12

• Interacts directly with target tissues, which include bone, immune cells, skeletal muscle, fat cells, and liver tissue
  – GH stimulates liver to make IGF
  – Regulated by neuroendocrine feedback mechanisms and mediated by secondary hormones (IGF-I)
  – Also known as Somatotropin

Question 13

When is GH highest in secretion

Answer 13

During sleep.

woman have higher blood level of GH

Question 14

Acute GH response to exercise

Answer 14

• Exercise stimulates GH production
• Longer duration exercise causes more GH to be made (fuel mobilization)
• Concentration peaks after exercise – tissue repair role
• GH response depends on load, rest, and volume of exercise
• GH is stimulated by increased blood lactate
• Only binds with muscle cells that have been active

Question 15

Chronic training adaptations in GH

Answer 15

Resting GH levels

– There is little change in single measurements of resting GH concentrations in resistance-trained individuals

Question 16

Insulin-Like Growth Factors

Answer 16

Secreted by the liver through stimulus by effects of GH
– Muscle also produces its own IGF
– may be more important than blood IGF from liver