Integumentary, Skeletal + Endocrine

Question 1

What are the two type of feedback loops, give examples

Answer 1

Negative feedback - homeostasis

Positive feedback - reproductive system

Question 2

What are 2 structural components that protect from physical and invasion from foreign organisms?

Answer 2

Melanocytes - protect from harmful UV rays and the epidermis to shield from invasion

Question 3

What are 4 components that regulate body temp?

Answer 3

Hair to trap heat, capillaries to allow blood flow to the skin, sweat gland/pore to expel sweat to cool skin when in evaporates and fat cells to maintain insulation

Question 4

What 2 components allow for excretion of salts, water and oily compounds ?

Answer 4

Sweat glands/pores to excrete salt, sebaceous glands to excrete oil

Question 5

2 structural components for the sensation of environmental stimuli, such as touch, pain, hot + cold

Answer 5

Nerve fibres to detect tactile corpuscle which is responsible for sensitivity to light/ touch

Question 6

What are the 5 parts of a feedback loop?

Answer 6

Stimulus 
Endocrine gland/cells
Hormone
Target organ/ cells
Response

Question 7

4 parts of endocrine system

Answer 7

Adrenal glands
Pancreas
Ovaries
Testes

Question 8

How can you determine the skin on the sole of a foot?

Answer 8

Thick horny layer to provide more protection. Also contains a sweat gland, tactile corpuscle, apidose tissue

Question 9

How can you determine skin on armpit?

Answer 9

A prince gland - special type of sweat gland. Also contains sebaceous gland, pilot erector muscle, sweat gland, hair and adipose tissue

Question 10

How can you determine the skin of the scalp?

Answer 10

Contains more hair than armpit.

Has sebaceous gland, sweat gland, pilor erector muscle, hair root, hair and adipose tissue

Question 11

Why are able to sense being touched at two different points?

Answer 11

More than one tactile corpuscle is being activated

Question 12

What does minimum distance of the to point discrimination depend on?

Answer 12

Density of the touch receptors on a particular part has of skin

Question 13

What would be considered sensitive patches of skin? Why are they sensitive??

Answer 13

Fingers tips -used for touch; touch receptors

lips- same

Question 14

Insensitive patches of skin?

Answer 14

Underneath foot, elbow

Question 15

What are the 5 key functions of the mammalian skeletal system? Describe the differences in the functions of these systems.

Answer 15

Shape
Support 
Moment 
Protection
Blood cell production

Question 16

Draw negative feedback loop of thyroxine (T4)

Answer 16

Search up

Question 17

Explain how manipulating one component of a specific feedback loop will affect other components

Answer 17

Feedback loop components rely on each other to produce an input and output. If we were to manipulate one component of the chain, the rest of the components would be affected, for example, if we got rid of the stimulus, out endocrine would not be stimulated, so there would be no response.

Question 18

Explain how a feedback loop would restore homeostasis following a disturbance

Answer 18

Posterior pituitary secretes anti-diuretic hormone, which then goes to target kidney, in this case, the kidneys. ADH begins reabsorption of water in the collecting duct in the nephron and regulates water balance in the body.

Question 19

Name at least 3 examples of hormones - describe effects

Answer 19

Thyroid stimulating hormone - stimulates thyroid gland

Anti-diuretic - help regulate water balance

Growth - promotes bone lengthening

Question 20

Explain structural differences between animal skeletal system by describing the differences of the functions of these systems

Answer 20

Humans have 3 curvatures in the spine to allow a straight, upright posture. Animals, like cats for expample, have a two curved spine a long with a tail for increased balance on four legs.