Lecture notes Senses & endocrine Flashcards Preview

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Flashcards in Lecture notes Senses & endocrine Deck (25):
1

Briefly describe endocrine system

Ductless glands
• Secrete directly into blood stream
• Produce hormones
• Action on another tissue or organ – Target cells or target organs

2

Gonadotropin does what?

Stimulates gonads to produce other hormones or causes sex cell maturation

3

Hormone production results in increased hormone production

Positive feedback loop

4

Hormone production results in decreased hormone production

Negative feedback loop

5

Give an example of a baby getting milk from its mother as a positive feedback loop

Suckling on mammary
• Oxytocin produced
• Milk ejection
• More suckling
• More oxytocin
• More milk ejection
• Stops when baby stops
Hormone production results in increased hormone production!

6

Give an example of how glucose is a negative feedback loop

Glucose rises in blood
• Insulin produced
• Glucose level falls
• Insulin production falls
• Glucose level rises
Hormone production results in decreased hormone production

7

1) Steroids
2) Peptides
3) Biogenic amines = amines

Hormones

8

Derived from cholesterol; secreted mostly by reproductive organs & adrenal cortex


Steroids

9

Amino acid derivatives & thus small; thyroid hormones & melatonin from the pineal gland are examples


Amines

10

string of amino Too large to pass through cell membranes, Most hormones are “peptide hormones”; e.g.-ALL pituitary hormones

Polypeptide & protein

11

Control center, controls in 3 ways; 1) Hormones stimulate anterior pituitary 2) Posterior pituitary hormones are actually made by hypothalamus, ADH & oxytocin travel down the axons in the infundibulum to be released by the posterior pituitary 3) Stimulates adrenal medulla

Hypothalamus

12

This gland is controlled by the hypothalamus. Nervous and endocrine systems combined

Pituitary

13

Sometimes called the “master gland”
Produces many hormones that effect other endocrine glands

Pituitary

14

What hormones does the pituitary gland have?

1) FSH
2) LH
3) ACTH
4) TSH
5) MSH
6) Prolactin
7) Growth hormone (GH)

15

The pineal gland has

Melatonin & circadian rhythm

16

The thyroid gland has

Thyroid hormone> metabolism
Calcitonin> decreases Ca++ in blood

17

The parathyroid has

Parathyroid hormone & increase Ca++ in blood

18

Numerous hormones & immune response

Thymus

19

The adrenal glands have

Adrenalin (epinephrine)
Noradrenalin (norepinephrine)
Corticosteroids

20

Pancreas

Insulin
• Glucagon
– Glucose balance

21

Gonads are

Ovaries and Testes
• Sex Hormones
• Estrogen, Progesterone & Testosterone

22

Interpret stimuli

Receptors

23

Transducers

Change stimulus into action potential

24

Large area v small area

Receptive fields

25

Degree of muscle tension (or force); Reflex causes muscle relaxation Proprioception

Golgi tendon organ