PDF 3,4,5 Endocrine system TSU

What is the molecular weight of human growth hormone (GH)?

• 15 kDa

• 22 kDa

• 44 kDa

• 50 kDa

GH stimulates growth primarily through:

• Dopamine

• IGF-I (somatomedin C)

• Cortisol

• Estrogen

The half-life of GH in plasma is:

• 5–10 minutes

• 15–25 minutes

• 20–50 minutes

• 1–2 hours

GH is secreted by:

• Thyrotrophs

• Somatotrophs

• Lactotrophs

• Gonadotrophs

The most direct metabolic effect of GH is:

• Hypoglycemia

• Lipogenesis

• Lipolysis

• Glycogen storage

GH release is stimulated by:

• Somatostatin

• GHRH

• ACTH

• TSH

IGF-I resembles which hormone structurally?

• Estrogen

• Cortisol

• Insulin

• Glucagon

Prolonged fasting increases GH secretion due to:

• Glucose elevation

• Decreased amino acids

• Increased fatty acids

• Elevated insulin

Placental lactogen mimics the actions of:

• ACTH

• GH and prolactin

• Oxytocin

• FSH

The main regulator of IGF-I production is:

• Cortisol

• GH

• Estrogen

• Progesterone