Upgrade to remove ads
Only $35.99/year

Biology - Triple Biology Unit 3/ Nervous system, Brain, Eye, Endocrine system etc.

Terms in this set (19)

Name 3 symptoms of Type 2 diabetes
Urinating a lot, feeling tired, increasingly thirsty
Name 3 consequences of type 2 diabetes
Heart attacks, strokes and kidney failure
Define the term diabetes
The inability to control blood sugar levels
Name a treatment for type 1 and 2 diabetes
Type 1: Insulin injections Type 2: Exercise and healthy diet
What gland produces insulin
The pancreas
Fill the gaps:
Blood glucose levels increase (food)-
The 1.________ detects the level of glucose in the blood. The pancreas makes the hormone 2._______ and releases it into your 3._____ ______. Insulin travels to the 4._____. It causes the liver to take in 5._______ and turn it into glycogen. Blood glucose levels 6.____.
Gaps answers:
1. pancreas
2. insulin
3. blood stream
4. liver
5. glucose
6. fall
Fill the gaps:
Blood glucose levels decrease (exercise and no food)-
Drop in blood glucose level is detected by the 1.________. The pancreas makes the hormone 2.________ and releases it into the 3._____ ______. Glucagon travels to the liver. It causes 4.________ in the liver to be broken down into 5._______. This is released into the blood stream so glucose levels 6.____.
Gaps answers:
1. pancreas
2. glucagon
3. blood stream
4. glucagon
5. glucose
6. rise
Define the term Stimuli
Changes in the environment that can be detected e.g a loud bang
Define the term Receptor
Detects stimuli (changes in the environment)
Define the term effector
Muscle or gland that brings about a response to restore optimum levels
What is a Neurone
A nerve cell that carries information as tiny electrical impulses
What 2 things consist of in the CNS (Central Nervous system)
The brain and spinal cord
What does a sensory/relay/motor neurone do
sensory - Carry electrical impulses from the recpetors to the CNS
relay - Carry electrical impulses from the sensory neurones to motor neurones and are found in the CNS
motor - Carry electrical impulses from the CNS to effectors
Fill the gaps:
Electrical signals have to pass from one neurone to another. There is a junction called a 1._______ between two neurones which the signal has to cross. An electrical impulse travels down neurone 2.___ and reaches the synapse. This triggers the release of 3.________ ___________ substance such as acetylcholine. This chemical diffuses across the synapse and binds to the 4._________ on neurone 5.___. An electrical impulse is generated in the second neurone and the electrical impulse travels down neurone 6.___.
Gaps answers:
1. synapse
2. one
3. chemical transmitter
4. receptors
5. two
6. two
Define the term synapse
A junction between two neurones. Signals can cross this junction using chemicals
Define the term reflex
A very quick, automatic response that bypasses the brain
Fill in the gaps:
Homeostasis-
1.___________ is the regulation of the 2.________ conditions of a cell or organism in response to internal and external 3.__________. Homeostasis maintain optimal conditions for 4.______ action and all 5.____ functions e.g if temperature rises above this level, enzymes would be 6._________ and so would not function.
In the human body, these include control of: body 7.___________, blood 8._______ concentrations and 9._____ levels.
All factors are kept at a constant level by automatic 10._______ systems, which may involve 11._______ or chemical responses.
Gaps answers:
1. homeostasis
2. internal
3. conditions
4. enzyme
5. cell
6. denatured
7. temperature
8. glucose
9. water
10. control
11. nervous
Define the nervous pathway
Stimulus -> Receptor -> SENSORY NEURONE -> RELAY NEURONE (BRAIN (CNS)) -> MOTOR NEURONE -> Effector -> Response
Out of these words match up them with receptor/stimulus/effector/response for touching a hot pan
- touching hot pan
- temperature sensitive cells
- various muscles
- move hand
touching hot pan = stimulus
temperature sensitive cells = receptor
various muscles = effector
move hand = response
Verified questions
health
What was the effect of combining the taste of eggs with a sweet filling? With a savory filling?
Verified answer
biology
How do the chemical structures of ribose and deoxyribose differ?
Verified answer
computer science
In Python, getting user input is done with a special expression called a) for b) read c) simultaneous assignment d) input
Verified answer
biology
Using the general guidelines presented in chapter 17 and fi gure 22.3, explain how you can tell for sure if a fungal isolate is the actual causative agent or merely a contaminant.
Verified answer