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Flashcards in Combined Biology - 4.5 Deck (44)
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1

Name the cells that detect stimuli (changes in the environment)

Receptors

2

What is homeostasis?

The regulation of internal conditions of a cell or organism to maintain optimum conditions for function in response to internal and external changes

or

“Maintaining internal body conditions”

3

Why is homeostasis important?

To maintain optimum conditions for enzymes and all cell functions.

4

List three things that are controlled by homeostasis.

1) Blood glucose

2) Body Temperature

3) Water levels

5

What is the gap between two neurones called?

Synapse

6

What type of signal travels along neurones?

Electrical

7

What type of signal is transmitted across a synapse?

Chemical

8

1. What does CNS stand for?

 

2. What two organs make up the CNS?

1. Central nervous system

 

2. Brain and spinal cord

9

Name the organ from the CNS that is not involved in a reflex response.

Brain

10

List, in order, the neurones involved in a reflex response.

sensory neurone → relay neurone → motor neurone

11

What are the two types of effector?

Muscles and Glands

12

Put the following stages in order for a nerve response.

 

Effector / stimulus / response/ coordinator / receptor

  1. Stimulus
  2. Receptor
  3. Coordinator
  4. Effector
  5. Response 

13

What is reaction time?

The time it takes for an organism to respond to a particular stimulus

14

1. What is the name of the group of glands that produce hormones?

 

2. How do the hormones secreted by these glands get to their target organ?

1. Endocrine glands

 

2. They travel in the blood

15

Compare nerve and hormones responses 

• Hormones are slower and act in a more general way.

• Nerve responses are faster and act in a more precise way.

• Hormone responses act for longer than nerve responses.

• Hormones are chemical signals. Nerve responses are electrical signals.

16

1. What is the name of the ‘master gland’?

 

2. Where is the ’master gland’ located?

 

3. What is the job of the ’master gland’?

1. Pituitary gland

2. Brain

3. Stimulate other glands to secrete hormones

 

17

Can you locate the following glands on the human body? 

 

adrenal / thyroid / ovaries / testes / pancreas / pituitary

18

Which part of the body coordinates blood glucose concentration?

Pancreas

19

Name the hormone that reduces blood sugar levels.

Insulin

20

Describe how blood glucose is controlled if it gets too high.

• The pancreas produces insulin.

• Insulin causes glucose to move from the blood into the cells.

• In liver and muscle cells, excess glucose is converted to glycogen for storage.

21

What is the role of FSH in the menstrual cycle?

Causes an egg to mature

22

What is the role of LH in the menstrual cycle?

Stimulates the release of an egg

23

What is the role of Progesterone in the menstrual cycle?

Maintains uterus lining

24

 1. How does barrier method contraception work?

 

2. Name one type of barrier method contraception.

1. Prevents sperm reaching the egg

 

2. Examples include: condom, diaphragm e.t.c.

25

Name the hormone produced in the ovaries

Oestrogen

26

What is the name of the hormone produced in the testes?

Testosterone

27

On what day of the menstrual cycle is an egg released from the ovaries?

Day 14

28

What happens at ovulation?

An egg is released from the ovary

29

What type of diabetes is inherited?

Type 1 diabetes

30

Obesity is a risk factor for what type of diabetes?

Type 2 diabetes