Homeostasis And Response

Question 1

What maintains optimal conditions for enzyme action and all cell functions.?

Answer 1

Homeostasis

Question 2

In the human body homeostasis includes control of what?

Answer 2

• blood glucose concentration
• body temperature
• water levels.

Question 3

These automatic control systems may involve what kind of responses?

Answer 3

nervous responses or chemical responses.

Question 4

All control systems include:

Answer 4

• cells called receptors, which detect stimuli (changes in the environment)
• coordination centres (such as the brain, spinal cord and pancreas) that receive and process information from receptors
• effectors, muscles or glands, which bring about responses which restore optimum levels.

Question 5

What si receptors do?

Answer 5

Detect stimuli, any changes in the environment

Question 6

What does the coordination centre do?

Answer 6

receive and process information from receptors

Question 7

What are effectors and what do they do?

Answer 7

muscles or glands, which bring about responses which restore optimum levels.

Question 8

The nervous system enables humans to?

Answer 8

react to their surroundings and to coordinate their behaviour.

Question 9

Order of the nervous system?

Answer 9

stimulus receptor coordinator effector response

Question 10

In description describe to me the nervous system?

Answer 10

Information from receptors passes along cells (neurones) as electrical impulses to the central nervous system (CNS). The CNS is the brain and spinal cord. The CNS coordinates the response of effectors which may be muscles contracting or glands secreting hormones.

Question 11

What are reflex actions?

Answer 11

automatic and rapid; they do not involve the conscious part of the brain.

Question 12

Describe the endocrine system?

Answer 12

is composed of glands which secrete chemicals called hormones directly into the bloodstream. The blood carries the hormone to a target organ where it produces an effect. Compared to the nervous system the effects are slower but act for longer.

Question 13

What is classed as a master gland

Answer 13

The pituitary gland

Question 14

What does the pituitary do?

Answer 14

secretes several hormones into the blood in response to body conditions. These hormones in turn act on other glands to stimulate other hormones to be released to bring about effects.

Question 15

Blood glucose concentration is monitored and controlled by the what?

Answer 15

the pancreas.

Question 16

If the blood concerntration is too high what happens too the pancreas?

Answer 16

produces the hormone insulin that causes glucose to move from the blood into the cells.

Question 17

In liver and muscle cells excess glucose is converted to what?

Answer 17

Glycogen for storage

Question 18

Type 1 diabetes is a disorder in which what happens?

Answer 18

Pancreas fails to produce sufficient insulin

Question 19

Do people with diabetes type 1 produce high sugar levels or low sugar levels

Answer 19

High sugar levels

Question 20

How is type 1 diabetes treated?

Answer 20

With insulin injections