The diagram shows a pathway in the human body
1
What step would go in the blank box?
What step would go in the blank box?
4.5.2.1
If the environment gets cold, we will often shiver in order to:
Check ALL of the examples of homeostasis in the human body
Match the sense to its corresponding receptor type:
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Hearing | arrow_right_alt | Olfactory receptors in the nose |
Taste | arrow_right_alt | Hair cells in the cochlea |
Smell | arrow_right_alt | Taste buds on the tongue |
What is homeostasis?
Identify the sense and its receptor:
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Touch | arrow_right_alt | Vestibular receptors in the inner ear |
Balance | arrow_right_alt | Photoreceptors in the retina |
Sight | arrow_right_alt | Mechanoreceptors in the skin |
Which environment did the worm, in our practical, prefer?
List what we need to keep the same in our bodies to maintain balance.
What is homeostasis in living organisms?
What is ideal body temperature, in Celsius?
Which of the following statements explain why enzymes stop working at extremely high body temperatures?
Maintaining an optimum internal temperature is important in keeping us alive and healthy.
Complete the gaps in the sentences below.
Losing too much water can lead to
The diagram shows a pathway in the human body
What step would go in the blank box?
What are the names of the cells that transmit signals?
How do you think drugs work, a neurone level?
Which of the following are parts of the central nervous system (select all that apply)?
Which of the following are parts of the peripheral nervous system (select all that apply)?
What are the names of the cells that transmit signals?
What is homeostasis?
You receive a phone call, how your sensory neurons act here?
Which could be the response of your motor neurons?
Dentists often use medicines called local anesthetics when removing a tooth so that the patient does not feel pain. Which of the following statements describes how local anesthetics block pain?
A student does the following in the kitchen. Click on two tasks that require sensory neurons.
A student does the following in the kitchen. Click on two tasks that require motor neurons.
The diagram shows a pathway in the human body
What step would go in the blank box?
Put the steps in order for a reflex arc
Motor neuron
Sensory neuron
Stimulus
Relay neuron
Effector
Put the steps in order for a reflex arc
Muscles tense to pull your hand away
Signal goes down your arm to your muscles
Touch neurones send the signal up your arm
Touch a hot stove
Electrical signal goes through your spine
Many human actions are reflexes.
(a) Which statement describes a reflex action?
Which two human actions are reflexes?
Tick (✓) two boxes.
Many human actions are reflexes.
(a) Which statement describes a reflex action?
Put the steps in order for a reflex arc
Motor neuron
Sensory neuron
Stimulus
Relay neuron
Effector
Identify the stimulus and effector here
Is this a reflex action? Justify with reason
Spontaneous, automatic, involuntary response of our body to external stimulus is called
Which nerve carries information from spinal cord to muscles?
What is advantage of reflex action?
Label the glands on Figure 1.
thyroid gland
Hormones are special chemicals your body makes to help it do certain things – like grow up! Hormones are important when you start to go through puberty, which is when you begin developing into an adult. During this time, you're loaded with hormones that tell your body that it's time to start changing.
Example
Insulin is an important hormone. It regulates the amount of sugar in your blood. That sugar, called glucose, is the body's main source of fuel.
The glands of the endocrine system . They regulate all of the processes of the body and make sure they get to where they need to be on time.
Each hormone has . Glands are spread throughout the body. A lot of them are controlled by a gland in the brain called the . A pituitary gland also produces , which is what makes us grow big and tall. Teh pancreas makes insulin and the nervous system handles adrenaline.
Thyroid hormones regulate how from the food we eat. That is called metabolism. Adrenal glands control the release of adrenaline, which is some powerful stuff used in .
The is the biggest gland of the endocrine system. It produces insulin, a chemical that's help the body process energy from the food we eat.
The reproductive glands make sure that the body goes through the changes of puberty so that you can grow from a child to an adult. The ovaries oversee puberty in girls by secreting a hormone called . The testes secrete for development in boys. The are like sports team coaches.
If even a small amount of estrogen gets into waterways, it can have a huge impact on local fishes. The chemical disrupts the organs that enable them to reproduce. Most fishes are not born male or female. Instead, environmental factors, such as temperature, food availability, and social interactions, determine which sex organs they develop. In a healthy habitat, some fishes produce eggs and others produce the sperm to fertilize eggs. However, increased levels of estrogen in the water can affect the the expression of traits in fish.
Data collected in the field and in the laboratory show that estrogen affects how fish develop. When exposed to estrogen, males produce fewer or no sperm and some even produce eggs. Many female stop producing eggs. Without healthy males and females, these fish populations drop.
To understand estrogen's effects on wild fish, scientists released small amounts of the chemical into a lake in Ontario, Canada. They observed drastic changes in the fathead minnows that had been living thriving in the lake. The females produced fewer eggs. The males produced fewer sperm or began to develop eggs. After 3 years, the minnow population had nearly disappeared. Once scientists stopped adding estrogen, the fish population began to recover.
fishes are not born male or female. Instead, environmental factors, such as , food availability, and social interactions, determine which sex organs they .
Estrogen in wastewater
Once scientists stopped adding estrogen, did the fish recover?
To understand estrogen's effects on wild fish, scientists released small amounts of the chemical into a lake in Ontario, Canada. What drastic changes did they find?
Endocrine systems are another name for
Cells that are able to respond to a particular hormone are called . In order to be this kind of cell, the cell must have a for that particular hormone.
responding cells
carbohydrate
lipid
receptor
stem cells
non-target cells
ribosome
target cells
For each number listed from the diagram below, identify the name of that particular endocrine gland.
#3 -
#4 -
#6 -
#8 -
#9 -
Where is the thyroid located?
Cells in the pancreas detect blood glucose concentration.
What type of cells detect blood glucose concentration?
Tick (✓) one box
The pancreas produces insulin.
How is insulin transported from the pancreas to the rest of the body?
Which organ is a target organ of insulin?
Tick (✓) one box.
Which chemical is a store of glucose in human cells?
Tick (✓) one box.
When estrogen and progesterone levels drop, the process of _____ has begun to occur
Towards the "end" of the menstrual cycle, a person's uterine lining will begin to shed. This is known as a person's
Both LH and FSH are hormones that come from ________
Which hormone causes ovulation to take place?
Oestrogen and progesterone are used in combined oral contraceptive pills
Condom reduces transmission of Human Immunodeficiency Virus during sexual intercourse
Progestogen based contraception has a side-effect of irregular menstrual pattern
What is the only choice that is 100% effective in preventing STI's and pregnancy?
What is a dome shapped rubber cap with a flexible rim that covers the cerivc and blocks sperm from getting into the uterus?
In Vitro Fertilisation (IVF) can be used to treat infertility.
Which hormones are given to women having IVF treatment?
Tick (✓) one box.
Name the target organ of the hormones used for IVF.
The eggs are collected from the mother’s
Each egg is fertilised by a
Each fertilised egg develops into a ball of cells called an embryo.
One or two of these embryos are inserted into the mother’s
pituitary gland
Scientists studied women who had IVF treatment.
The table below shows the results.
| Number of women |
Received IVF treatment | 450 |
Successful IVF treatment | 135 |
Calculate the simplest ratio of the number of women who had successful IVF to the number of women who had unsuccessful IVF.
Give the ratio in whole numbers.
Match the hormone to the gland that it is secreted by.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Insulin | arrow_right_alt | Adrenal gland |
Adrenaline | arrow_right_alt | pituitary gland |
TSH | arrow_right_alt | Throid Gland |
Thyroxine | arrow_right_alt | Pancreas |
What is the mechanism called where the body detects changes in conditions, then reverses these changes to bring levels back to normal?
Put these steps in order to show the body's response to low levels of thyroxine.
Thyroxine levels increase back to normal.
Low thyroxine levels are detected.
The thyroid gland is stimulated to produce thyroxine.
The pituitary gland secretes TSH.
Which is true for when thyroxine levels are too high?
What causes blood glucose levels to rise?
When your blood glucose rises, insulin is released by what organ?
What is the function of insulin?
Insulin causes what organ to take up glucose?
What does glucagon do?