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WorksheetsY12 Homeostasis I
Total questions: 25
Worksheet time: 13mins
What is homeostasis?
It is the control of blood glucose level
It is the control of water levels in cells
It is the control of a constant internal environment for a range of different factors
Why do the hairs on our skin sometimes stand up when we are cold?
to trap air under them in order to keep us warmer
To know when we are frightened
The hairs stand up in order to cool us down when we are too hot
Which part of the brain monitors body temperature?
Pituitary gland
Hypothalamus
Cerebellum
What happens during vasodilation?
Blood vessels narrow and shrink away from the skin’s surface
Blood vessels widen so more blood flows through capillaries in the skin
Blood vessels move down in the skin
Why does sweat help us to cool down?
The sweat sits on your skin and cools you down because it is a liquid
It makes your clothes damp and you feel cooler
Sweat removes thermal energy from the skin during evaporation
Here are the strategies used by the body to reduce body temperature, except?
Decrease muscle contraction
Vasodilation
Vasoconstriction
What type of feedback is involved in thermoregulation?
Negative
Positive
Neutral
When the environmental temperature decreases gradually, the hypothalamus releases a hormone which activates the anterior pituitary gland to release hormone called ………………….to stimulate thyroid gland to produce thyroxine
Antidiuretic hormone
TSH hormone
Adrenaline hormone
Here are the functions of thyroxine hormone, except
Increases metabolic rate
Increases heat production in liver
Give fight and flight response
If a person breathes air that has very high carbon dioxide content, this produces a high concentration of carbon dioxide in the blood. This is sensed by carbon dioxide receptors, which cause the breathing rate to increase. When the person breathes faster, taking in even more carbon dioxide. What is the name of feedback that happen in this event?
Negative
Positive
Neutral
If more proteins is eaten than is needed, the excess cannot be stored in the body. The removal amino group that happens in the liver is called....
Excretion
Ultrafiltration
Deamination
Other than urea, what are the two nitrogenous products excrete from the body?
Amino acid, nucleotide
Creatinine, creatine phosphate
Uric acid, creatinine
Here is the nitrogenous excretory product that created from nucleotide purines
Creatinine
Uric acid
Urea
Here is the molecular formula of urea
CO (NH2)
CO (NH2)2
CO (NH2)3
To make urea, ammonia (NH3) react with this substance
Carbon dioxide
Uric acid
Creatinine
A narrow tube that connects kidneys with the bladder is
Ureter
Urethra
Nephron
A section in the kidney where the ureter joins is in the….
Cortex
Capsule
Pelvis
Each kidney receives blood from
Renal artery
Renal vein
Arteriole
A section through a kidney, seen through a microscope shows it to be made up of thousands of tiny tubes called………….and many blood vessels
Bowman's capsule
Glomerulus
Nephron
One end of the tube that forms a cup-shaped structure in the kidney is called…
Bowman's capsule
Glomerulus
Nephron
The cup-shaped tubule structure surrounds a tight network of capillaries that is called a
Bowman's capsule
Glomerulus
Nephron
The tubule that forms a long hairpin loop in the medulla is called
Proximal convoluted tubule
Distal convoluted tubule
Loop of Henle
Here are kidney tubule that located in the cortex of the kidney, except
Bowman's capsule
Distal convoluted tubule
Collecting Duct
Each glomerulus is supplied with blood by a branch of renal artery called an…………arteriole
Efferent
Afferent
Ifferent
The capillaries of the glomerulus rejoin to form an…………arteriole
Efferent
Afferent
Ifferent
