B5 - The Living Body Flashcards
B5 - The Living Body
Where are proteases active?
Stomach and small intestine.
B5 - The Living Body
Where is bile stored?
Gall bladder
B5 - The Living Body
What antibodies do blood group A have?
Anti-B
B5 - The Living Body
Why do the cilia beat?
To push microbe filled mucus out of the lungs as phlegm
B5 - The Living Body
What are the 2 ways doctors can measure heart function?
Electrocardiogram (ECG) and echocardiogram
B5 - The Living Body
What happens to muscles during inspiration?
Intercostal muscles and diaphragm contract, increasing volume of thorax which expands lungs and decreases pressure inside - draws air in.
B5 - The Living Body
Which groups can group O donate blood to?
Anyone
B5 - The Living Body
How is blood prevented form flowing in the opposite direction?
Atrioventricular and semilunar valves.
B5 - The Living Body
What is an antigen?
A substance that can trigger a response from a person’s immune system
B5 - The Living Body
What are examples of ball and socket joints?
Shoulder. Hip.
B5 - The Living Body
What happens to pull the lower arm upwards?
Biceps contract
B5 - The Living Body
Why is the stomach acidic?
Provides optimum pH for protease enzymes to work
B5 - The Living Body
What is one of the main problems with organ transplants?
Immune system can recognise new organ as foreign and attack it - rejection
B5 - The Living Body
What do the letters refer to in blood types?
Type of antigen on surface of red blood cells
B5 - The Living Body
What three measurements are taken to monitor baby growth?
Length, mass and head size
B5 - The Living Body
What happens to large insoluble molecules in the digestive system and why?
Broken down into small soluble molecules so they can be absorbed into blood plasma or lymph
B5 - The Living Body
What does the human respiratory tract consist of?
Trachea and bronchi
B5 - The Living Body
What is needed for IVF?
Sperm, eggs and a healthy uterus
B5 - The Living Body
How is sugar reabsorbed in the Kinsey nephron?
Using active transport
B5 - The Living Body
How often does dialysis have to be done and why?
Regularly. To keep dissolved substances at the right concentrations and remove waste.
B5 - The Living Body
What happens when the heart contracts?
Blood pushed around. Flows away from heart along arteries, through capillaries and back to heart via veins
B5 - The Living Body
What is the pH like in the stomach?
Very acidic (1-2)
B5 - The Living Body
Why do small intestines have a big SA?
For absorption
B5 - The Living Body
How is asthma treated?
Inhalers and some people take drugs to prevent attacks, but no cure.
B5 - The Living Body
What moves throughout the permeable membrane of a dialysis machine?
Waste substances like urea and excess water moves from blood into dialysis fluid.
B5 - The Living Body
What does the human respiratory tract consist of?
Trachea and bronchi
B5 - The Living Body
What does an ovary transplant involve?
Relatively new and rare procedure to transplant a healthy ovary from someone else.
B5 - The Living Body
What happens to muscles during expiration?
Intercostal muscles and diaphragm relax, thorax volume decreases and pressure in lungs increase, forcing air out.
B5 - The Living Body
What do animals with gills have?
Single circulatory system - 1 circuit of blood vessels from heart.
B5 - The Living Body
What antibodies do blood group AB have?
None
B5 - The Living Body
What happens during stage 1 of the menstrual cycle?
Menstruation starts. Uterus lining breaks down for about 4 days
B5 - The Living Body
How are bones at synovial joints held together?
By ligaments
B5 - The Living Body
What constantly flows through the open mouth of a fish?
Oxygen rich water which is then forced over gill filaments when mouth closes.
B5 - The Living Body
What does bile help with?
Fat digestion in small intestine
B5 - The Living Body
What does progesterone do?
Maintains lining of uterus. When levels of progesterone falls, lining breaks down. Inhibits production of LH
B5 - The Living Body
What is bone marrow?
Spongy substance that makes new blood cells
B5 - The Living Body
How do glucose and amino acids get into blood plasma and why?
Diffuse into blood plasma because they are small enough
B5 - The Living Body
What 3 things determine the concentration and amount of urine?
Heat, exercise and water intake
B5 - The Living Body
What happens to products which are not reabsorbed by the kidneys?
Continue out of the nephron, into ureter and down to the bladder as urine
B5 - The Living Body
What may damage to heart valves cause?
Valves to not open properly, causing high blood pressure. May even allow blood to flow in both directions so blood doesn’t circulate as effectively as normal.
B5 - The Living Body
What is the 2nd stage of the cardiac cycle?
Atria contract, pushing blood into ventricles. Semilunar valves closed. Atrioventricular valves open.
B5 - The Living Body
What moves in and out of the amphibians permeable skin?
Oxygen moves in. Carbon dioxide out.
B5 - The Living Body
Where are lipases active?
Small intestine
B5 - The Living Body
What range of pH does bile have?
Alkaline
B5 - The Living Body
What 4 ways can infertility be treated?
Artificial insemination (AI), FSH injections, In Vitro Fertilisation (IVF), ovary transplants
B5 - The Living Body
What happens when someone shows symptoms of an asthma attack?
Muscle relaxant drug is inhaled (from inhaler) to open airways.
B5 - The Living Body
What do multicellular organisms need in order to transport materials efficiently?
Blood circulatory system
B5 - The Living Body
What happens to carbon dioxide and the alveolus?
It diffuses out of blood into alveolus to get breathed out
B5 - The Living Body
What is cartilage?
Living tissue (rubbery)
B5 - The Living Body
What can blood plasma contain?
Anti-A or anti-B antibodies
B5 - The Living Body
What is an echocardiogram?
Ultrasound scan of heart
B5 - The Living Body
What is the 3rd stage of the cardiac cycle?
Ventricles contract forcing blood into aorta and pulmonary artery. Semilunar valves open. Atrioventricular valves close automatically.
B5 - The Living Body
What antigens do blood group A have?
A
B5 - The Living Body
What antigens do blood group O have?
None
B5 - The Living Body
What are the symptoms of an asthma attack?
Difficulty breathing, wheezing and tight chest
B5 - The Living Body
How do muscles move bones at a joint?
Contracting (can only pull, not push)
B5 - The Living Body
What do lipases break down?
Fats into fatty acids and glycerol
B5 - The Living Body
What is the middle of a long bone filled with?
Bone marrow
B5 - The Living Body
What does a pacemaker do?
Tells heart how fast to beat (pacemakers are a group of cells)
B5 - The Living Body
Where is bile made?
Liver
B5 - The Living Body
What can red blood cells have on their surface?
A or B antigens (or neither or both)
B5 - The Living Body
How can women who miscarry still have a baby?
Fertilised egg can be implanted into surrogate mother who gives birth to their baby
B5 - The Living Body
What does FSH do?
Cause egg to develop in one ovary. Stimulates ovaries to produce oestrogen.
B5 - The Living Body
What problems come with a longer life expectancy?
Shortages of housing and more environmental problems.
More old people and pensions are needed.
Older people have more medical conditions and their care is paid for by the taxpayer.
B5 - The Living Body
What are the 3 stages as blood passes through kidneys?
Ultrafiltration, reabsoption, release of wastes
B5 - The Living Body
When do doctors worry about a baby and its growth?
If size is above 98th percentile or below 2nd percentile. Or if there are inconsistent patterns.
B5 - The Living Body
How are asthmatics’ lungs different?
Overly sensitive to certain things
B5 - The Living Body
What did Claudius Galen do to investigate the heart?
Cut up animals to study them. Knew about chambers of heart. Thought arterial blood was made by heart, while blood in veins was made by liver, sucked through veins by heart and consumed by organs.
B5 - The Living Body
What does ADH control?
Amount and concentration of urine
B5 - The Living Body
What happens to blood when it reaches body cells which need oxygen?
It is released from red blood cells and diffuses into body cells
B5 - The Living Body
What mechanism affects hormone production in the menstrual cycle?
Negative feedback
B5 - The Living Body
What does a kidney dialysis machine do?
Filter a patients blood while they wait for a kidney transplant
B5 - The Living Body
What is the 4th stage of the cardiac cycle?
Blood flows along arteries, atria refill. Cycle repeats.
B5 - The Living Body
What other ethical concerns are there about organ donation?
People worry doctors might not save critically ill if organs are needed - safeguards in place. People may get pressured into being living donor - doctors make sure it is personal choice.
B5 - The Living Body
What is ovulation?
Happens at day 14 and is the development and release of an egg
B5 - The Living Body
What are bones made up of?
Living tissue/cells
B5 - The Living Body
How can you tell if a person is still growing?
Look at how much cartilage is present - lot = still growing
B5 - The Living Body
What happens to carbon dioxide at body cells?
Diffuses out of body cells and into blood which is carried back to lungs
B5 - The Living Body
What does the brain monitor (kidneys)?
Water content of blood
B5 - The Living Body
What happens when the brain detects water loss?
Pituitary gland releases more ADH and the ADH makes kidneys reabsorb more water
B5 - The Living Body
Why is the 4 chambered heart important?
Pump separately to lungs and body. Important to maintain high pressure.
B5 - The Living Body
How do ball and socket joints move?
All directions and rotate.
B5 - The Living Body
What do lungs contain millions of?
Little air sacs called alveoli
B5 - The Living Body
What does amniocentesis involve?
Using long needle to remove some fluid surrounding baby. Contains skin cells from baby and chromosomes can be analysed.
B5 - The Living Body
Why do unborn babies not need a double circulatory system?
Get oxygen from mother (placenta) - blood doesn’t need to go to lungs.
B5 - The Living Body
What 4 hormones are involved in the menstrual cycle?
Follicle stimulating hormone (FSH).
Oestrogen.
Progesterone.
Luteinising hormone (LH)
B5 - The Living Body
How does water help the gills of a fish?
Supports gills and keeps filaments separated from each other and prevent sticking together/suffocation
B5 - The Living Body
What does oestrogen do?
Cause lining of uterus to repair. Stimulates production of LH. Inhibits production of FSH.
B5 - The Living Body
What is the sequence of events in one complete heartbeat called?
Cardiac cycle
B5 - The Living Body
How are bones attached to muscles?
By tendons
B5 - The Living Body
How do the kidneys perform their roles?
By filtering the blood under high pressure and then reabsorbing useful things
B5 - The Living Body
What is a lifestyle choice which can cause lung disease?
Smoking
B5 - The Living Body
What happens when the brain detects water gain?
Pituitary gland releases less ADH and the lack of ADH means kidneys reabsorb less water
B5 - The Living Body
What does a heart-lung machine do?
Keep a patients blood oxygenated and pumping during heart or lung surgery.
B5 - The Living Body
What does the 50th percentile mean?
Mass that 50% of babies will reached at a certain age
B5 - The Living Body
What can CHD cause?
Reduced blood flow to heart muscle often results in heart attack.
B5 - The Living Body
What does synovial fluid do?
Lubricate joints, allowing easier movement
B5 - The Living Body
What are the lungs particularly prone to?
Infections because they’re dead end and microbes can’t get flushed out easily.
B5 - The Living Body
Where is oestrogen produced?
Ovaries
B5 - The Living Body
Which groups can group A receive blood from?
A and O
B5 - The Living Body
What else apart from exercise can affect heart rate?
Hormones e.g. Adrenaline - increases heart rate to ensure muscles have plenty of oxygen.
B5 - The Living Body
How can doctors measure lung capacity?
Using a spirometer
B5 - The Living Body
What does LH do?
Stimulates ovulation at day 14 and indirectly stimulates progesterone production.
B5 - The Living Body
What can a spirometer help diagnose?
Diagnose and monitor lung disease
B5 - The Living Body
Which groups can group AB donate blood to?
Only AB
B5 - The Living Body
Why do patients with kidney failure use dialysis?
They can’t filter their blood properly
B5 - The Living Body
What are the main type of joint in the body?
Synovial joints
B5 - The Living Body
What does dialysis contain and how much is there?
Same concentration of sodium and glucose as blood plasma, meaning they aren’t from blood.
B5 - The Living Body
Where is FSH produced?
Pituitary gland
B5 - The Living Body
What is different about the heart in single circulatory system?
2 chambers - 1 receives blood - 1 pumps blood out to gills and body.
B5 - The Living Body
What is the disadvantage of artificial parts in the heart?
Might not last very long and may need replacing.
B5 - The Living Body
What do your muscles need when you exercise and what does this do to the heart?
Need more oxygen to work harder, so you breathe faster and heart pumps faster to deliver more oxygenated blood to muscles.
B5 - The Living Body
Why is exercise important in determining the size an adult reaches?
Builds muscle and weight-bearing exercise can increase bone mass. It also stimulates release of growth hormone
B5 - The Living Body
What is the advantage of using artificial valves and pacemakers?
Rejection isn’t an issue. Made from metals/plastics which body doesn’t recognise as foreign like it does with tissue.
B5 - The Living Body
Why are long bones hollow?
Makes movement more efficient - lighter and stronger than solid bone of same mass).
B5 - The Living Body
What is CHD?
When coronary arteries supplying blood to heart get blocked by fatty deposits.
B5 - The Living Body
How can severe valve damage be treated?
Replace valve with an artificial one
B5 - The Living Body
Which groups can group A donate blood to?
A and AB
B5 - The Living Body
How does bile break down fat?
Breaks into tiny droplets and gives a bigger SA for lipase enzymes to work on.
B5 - The Living Body
What cell secretes mucus?
Goblet cell
B5 - The Living Body
What is different about the heart in a double circulatory system?
4 chambers - 2 circuits - 1 to body - 1 to lungs.