Homeostasis and Suvival needs of the Body

Question 1

What is Homeostasis?

Answer 1

It is the tightly controlled internal environment of the body where it is kept in a fairly constant state.

Question 2

Examples od Physiological Variables of Homeostasis?

Answer 2

1. Core temperature
2. Water and Electrolyte concentration
3. pH of the body fluid
4. Blood glucose levels
5. Blood and tissue oxygen and carbon dioxide levels
6. Blood pressure

Question 3

Explain the Control System of Homeostasis?

Answer 3

• It detects and respond to changes in the internal environment
  Process:
  1. A input is received by the detector or sensor (afferent)
  2. Input is taken to the control centre and if adjustments is needed, the control centre responds and output is send to the effector (efferent)
  3. The effector carry out the output from the control centre

Question 4

What is Negative Feedback?

Answer 4

any movement of such a control system away from its normal set point is negated.

Question 5

An example of negative feedback?

Answer 5

Body Temperature

Question 6

What is a Positive Feedback?

Answer 6

The stimulus progressively increase the response, so that as long as the stimulus is continued the response is progressively amplified

Question 7

An example of Positive Feedback?

Answer 7

Labour Contractions

Question 8

What is Homeostatic Imbalance?

Answer 8

It is when the fine control of a variable factor in the internal environment is inadequate and its level falls outside the normal range

Question 9

What are the survival needs of the body?

Answer 9

1. Communication
2. Intake of raw materials and elimination of waste
3. Protection and survival

Question 10

Describe the Transport System?

Question 11

Describe Internal communication?

Question 12

Describe External Communication

Question 13

What components are involved in the survival need of intake of raw material and elimination?

Question 14

What is Protection and survival need?

Question 15

Describe the need of Body Movement?