Lesson 5.1.1a
5.1.1a Communication systems and homeostatic control Quiz: OCR Biology, Unit 5
20 questions
In partnership with Revision Ninja
Lesson 5.1.1a, Communication systems and homeostatic control: 20 multiple choice questions for the OCR Biology (H020), Unit 5: Communication and homeostasis, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
Which term describes the maintenance of a stable internal environment despite external changes?
- Homeostasis
- Excretion
- Transduction
- Osmoregulation
-
What is the main function of a receptor in a homeostatic system?
- Cause responses
- Secrete hormones
- Process information
- Detect stimuli
-
How does negative feedback affect the stimulus that initiated the response?
- Maintains the change
- Amplifies the change
- Prevents all change
- Reverses the change
-
Which biological structures act as effectors in a human homeostatic response?
- Nerves and receptors
- Sensory neurones
- Brain and spinal cord
- Muscles and glands
-
What is the primary effect of positive feedback in a physiological system?
- Amplifies the change
- Reverses the change
- Restores set point
- Maintains constant state
-
How do adjacent or neighbouring cells primarily communicate with each other?
- Myelinated neurones
- Circulating hormones
- Local diffusion
- Active transport
-
How are signals transported to distant target cells in animals?
- Neurotransmitters in synapses
- Cytoplasmic bridges
- Hormones in blood
- Local diffusion
-
Which physiological responses occur in an endotherm when its body temperature drops?
- Vasoconstriction and shivering
- Vasodilation and shivering
- Vasodilation and sweating
- Vasoconstriction and sweating
-
How do ectotherms like lizards primarily regulate their internal body temperature?
- Metabolic rate changes
- Behavioural responses
- Sweating and panting
- Vasoconstriction alone
-
What is a key difference between thermoregulation in endotherms and ectotherms?
- Ectotherms maintain temperature
- Endotherms use physiology
- Endotherms lack behaviour
- Ectotherms generate heat
-
Which feedback mechanism switches a heater off when temperature reaches a set point?
- Open-loop feedback
- Positive feedback
- Feedforward control
- Negative feedback
-
What type of feedback loop accelerates the process of blood clotting during injury?
- Reversible feedback
- Negative feedback
- Neutral feedback
- Positive feedback
-
Which muscles contract to make skin hairs stand upright in cold conditions?
- Smooth arterioles
- Intercostal muscles
- Erector pili muscles
- Skeletal muscles
-
What type of feedback loop reverses a change to maintain a constant set point?
- Action potential
- Negative feedback
- Feed-forward control
- Positive feedback
-
Why do multicellular organisms require internal communication systems?
- To coordinate organs
- To lower temperature
- To produce waste
- To prevent diffusion
-
A mechanism that restores elevated body temperature back to normal is an example of what?
- Co-dominance
- Deamination
- Positive feedback
- Negative feedback
-
What type of cell signalling involves chemicals communicating between adjacent cells?
- Endocrine signalling
- Autocrine signalling
- Paracrine signalling
- Neuronal signalling
-
In homeostasis, what term describes the target physiological value maintained by the body?
- Set point
- Action potential
- Threshold level
- Optimum pH
-
Which hormone lowers blood glucose concentration towards its set point after eating?
- Thyroxine
- Insulin
- Adrenaline
- Glucagon
-
Which region of the brain acts as the central temperature control centre in mammals?
- Pituitary gland
- Hypothalamus
- Cerebellum
- Medulla oblongata
Related quizzes
- Excretion and the liver Quiz · 5.1.2a · 20 questions
- Kidney structure and osmoregulation Quiz · 5.1.2b · 20 questions
- Neuronal communication and synapses Quiz · 5.1.3a · 20 questions
- Hormones and blood glucose regulation Quiz · 5.1.4a · 20 questions
- Diabetes and its treatment Quiz · 5.1.4b · 20 questions
- Plant responses and plant hormones Quiz · 5.1.5a · 20 questions
- Nervous system, brain and reflexes Quiz · 5.1.5b · 20 questions
- Muscles and coordinated responses Quiz · 5.1.5c · 20 questions
- Microscopy and observing cells Quiz · 2.1.1a · 20 questions
- Specialised exchange surfaces and mammalian gas exchange Quiz · 3.1.1a · 20 questions