QCE Biology Unit 2: Maintaining the internal environment quiz

Keeping internal conditions perfectly and completely unchanging at all times

Allowing internal conditions to match the external environment exactly

Stopping all internal chemical and physical change entirely

Maintaining a relatively constant internal environment around a set point

Stimulus, receptor, control centre, effector, response

Effector, receptor, stimulus, response, control centre

Receptor, stimulus, effector, control centre, response

Control centre, stimulus, response, receptor, effector

It amplifies and accelerates the change

It opposes and reverses the change

It has no measurable effect on the change

It permanently fixes the variable in place

Sweating that occurs when the body temperature rises

Insulin release that lowers the blood glucose level

Oxytocin and uterine contractions during childbirth

ADH increasing water reabsorption in the kidney

Shivering and vasoconstriction

Piloerection and increased metabolic rate

Vasoconstriction and adrenaline release

Sweating and vasodilation

It increases water reabsorption in the kidney collecting ducts

It decreases water reabsorption, producing a large volume of dilute urine

It stimulates extra sweating to remove water from the body

It converts blood glucose into stored glycogen

Insulin and ADH

Insulin and glucagon

Adrenaline and thyroxine

Oxytocin and glucagon

Antibody production by plasma cells

Formation of memory B cells

Phagocytosis and the inflammatory response

Cytotoxic T cell killing of infected cells

It directly kills any pathogen that is already present inside the body at the time

It supplies ready-made antibodies that last a lifetime without any immune response

It acts as an antibiotic that prevents bacterial growth in the body

It introduces an antigen that triggers a primary response and forms memory cells

Random mutation produces resistant bacteria that survive and reproduce while susceptible ones die

Individual bacteria deliberately change themselves in order to survive being exposed to the antibiotic

The antibiotic itself causes brand-new resistance mutations to appear in every single cell

All bacteria are naturally resistant to antibiotics from the moment of birth onwards