Wk 10- Homeostasis & Endocrine System

Question 1

What are the 5 five main endocrine organs?

1. P? Glands
2. T?
3. P?
4. A? Glands
5. Gonads

Answer 1

1. Pituitary glands
2. Thyroid
3. Pancreas
4. Adrenal glands
5. Gonads

Question 2

What is homeostasis?

Keeps the body f? working in ideal e?.
Ph blood 7.?5- 7.4?
Body Temp 37 degrees

Homeostatic regulation = adjustments to ph? systems responding to st?.

Answer 2

Functions, environment
7.35-7.45
Physiological ,stimuli

Question 3

Homeostasis requires 3 components, what are they?

1. R?
2. C? Centre
3. E?

Answer 3

Receptor
Control
Effector

Question 4

Homeostasis:

Receptors= d? change in stimulus / e? conditions
Control centre= p? in? from receptors and tissues and sends commands to e?
Effectors= cell/ organ responds to commands from control centre and either en? or op? stimulus.
This is either p? or n? feedback

Answer 4

Detect , environmental
Processes information, effector
Enhances , opposes
Positive/ negative

Question 5

Homeostasis:

Negative feedback=
Majority of homeostatic systems response
O? original stimulus (^ body temperature detected = decrease temperature by s?)
E? mechanism is turned off

Answer 5

Oppose, sweating

Effector

Question 6

Homeostasis:

Positive feedback=
E? original stimulus (blood c? to prevent blood loss)

Answer 6

Enhance , clotting

Question 7

Hormones > target cells

Hormones travel in the b?
Bind to r? cell on the cell surface
Bind to specific t? cell = specific receptors for specific hormones
In turn this modifies the structure/ b? property of the target cell

Answer 7

Blood
Receptors
Target
Biochemical

Question 8

What are the 3 components of endocrine control?

1. H?
2. H?
3. N?

Answer 8

Hormonal
Humoral
Neural

Question 9

Endocrine control:
1. Hormonal~
Reg? hormones are secreted by the hy?

2. Humoral~
   P? cells monitor Ca++ (?) irons in the blood
3. Neural~
   Signals from the n? system

Answer 9

Regulatory , hypothalamus
Parathyroid , calcium
Nervous

Question 10

Hormonal:

Secretion of ?H regulated by GHRH (?) from the p? Gland

Answer 10

Growth , growth hormone releasing hormone

Pituitary

Question 11

Humoral:
Endocrine cells respond to the concentration of ions/ molecules in the blood.
Beta islet cells from the p? respond to the increase of blood g? levels by releasing ?
Alpha cells = g?
Beta cells = I?

Answer 11

Pancreas, glucose, insulin
Glucogen
Insulin

Question 12

Neural:

Endocrine cells respond to signals from the nervous system. In danger n? from the s? nervous system cause the secretion of e? and n?e?.

Answer 12

Neurons, sympathetic, epinephrine , nor epinephrine