SB7a

Question 1

What are Hormones?

Answer 1

Hormones are chemicals produced in
one organ/gland, released into the
blood to reach another organ (target
organ) and exert its effect (carry out
its function) there

Question 2

What is a Gland?

Answer 2

A gland is an organ that synthesises chemicals like hormones.

Question 3

What are the 2 groups glands and hormones are grouped into?

Answer 3

Endocrine
Exocrine

Question 4

What do we mean when we say hormones and glands are Endocrine?

Answer 4

hormones are secreted into the blood.

Question 5

What do we mean when we say hormones and glands are Exocrine?

Answer 5

hormones are secreted into a duct / tube.

Question 6

What are the 6 glands and what type are they?

Answer 6

Pituitary Gland
Thyroid Gland
Pancreas
Adrenal glands
Testes
Ovaries

Question 7

Name the 6 glands and the hormones each produces

Answer 7

Pituitary gland
ACTH
FSH
LH

Thyroid gland
Thyroxine

Pancreas
Insulin
Glucagon

Adrenal glands
Adrenaline

Testes
Testosterone

Ovaries
estrogen
Progesterone

Question 8

What is the Hypothalamus and state its purpose.

Answer 8

Hypothalamus is an area of the
brain that is responsible for
controlling the hormonal system
and maintaining homeostasis.

Question 9

What is Homeostasis?

Answer 9

Homeostasis is defined as the process through which organisms can
maintain internal body conditions within normal ranges while adjusting to changing external conditions.

Question 10

What do we mean when we say ‘Homeostasis is a dynamic process’?

Answer 10

Internal conditions vary continuously because organisms are exposed to different external conditions all the time

Question 11

What happens if we are uncapable of maintaining a homeostatic environment?

Answer 11

disease.

Question 12

State the 6 organs and their functions during homeostasis.

Answer 12

 Brain: controls temperature (hypothalamus), water and carbon
dioxide levels.

 Lungs: remove carbon dioxide.

 Pancreas: produces insulin and glucagon to control blood glucose
levels.

 Kidneys: control water and mineral ion levels (osmoregulation).

 Muscles: thermoregulation (shivering).

 Skin: thermoregulation.

Question 13

What are the Three essential components of
the homeostatic process?

Answer 13

 Receptors
 Control center
 Effectors

Question 14

What is the Nervous System?

Answer 14

Neural network the coordinates the functions of the body through impulses.

Question 15

What is the Hormonal System?

Answer 15

Collection of glands and hormones they release to control functions of the body.

Question 16

Compare and contrast Nervous System the and the Hormonal System.

Answer 16

The Nervous system uses Electrical Impulses in order to deliver messages while the hormonal system uses hormones

The speed of response of the nervous system is fast whiles the speed of response of the hormonal system is slow

The duration of the response of the nervous system is fast while the hormonal system is slow

The area of response of the Nervous System is Localizedy whilst the Hormonal System is Widespread, throughout the body