Lesson 5.1.5c
5.1.5c Muscles and coordinated responses Quiz: OCR Biology, Unit 5
20 questions
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Lesson 5.1.5c, Muscles and coordinated responses: 20 multiple choice questions for the OCR Biology (H020), Unit 5: Communication and homeostasis, written with Revision Ninja.
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The 20 questions
-
Which type of non-striated, involuntary muscle is found in the gut wall?
- Smooth muscle
- Cardiac muscle
- Skeletal muscle
- Voluntary muscle
-
Which type of muscle tissue is striated and under voluntary control?
- Cardiac muscle
- Smooth muscle
- Skeletal muscle
- Involuntary muscle
-
Which specific structures join adjacent cardiac muscle cells together?
- Intercalated discs
- Synaptic clefts
- Haversian canals
- Z-discs
-
What is the synapse between a motor neurone and a skeletal muscle fibre called?
- Relay junction
- Neuromuscular junction
- Sensory synapse
- Ganglion
-
Which filament slides over myosin during skeletal muscle contraction?
- Collagen
- Actin
- Troponin
- Tropomyosin
-
Which molecule provides the energy for muscle contraction by binding to myosin heads?
- Glucose
- Glycogen
- Creatine
- ATP
-
What is the main function of creatine phosphate in muscle contraction?
- Binding oxygen
- Storing calcium ions
- Regenerating ATP
- Synthesising glycogen
-
Which protein do calcium ions bind to during muscle contraction?
- Troponin
- Tropomyosin
- Actin
- Myosin
-
Which repeating functional units give skeletal muscle its striated appearance?
- Myofibrils
- Fascicles
- Sarcomeres
- Sarcoplasmic reticula
-
Which region of the sarcomere narrows during muscle contraction?
- M-line
- A-band
- H-zone
- Z-disc
-
What happens to a muscle fibre if ATP is completely depleted?
- Relaxes completely
- Hyperpolarises
- Remains contracted
- Contracts faster
-
What is the main function of creatine phosphate in muscle tissue?
- Hydrolyses glycogen
- Produces lactic acid
- Stores oxygen
- Regenerates ATP rapidly
-
Which nerve pathway and hormone both increase heart rate during exercise?
- Parasympathetic and thyroxine
- Sympathetic and insulin
- Sympathetic and adrenaline
- Parasympathetic and adrenaline
-
How does pulse rate typically change during exercise and recovery?
- Rises continuously
- Falls then rises
- Rises then falls
- Stays constant
-
Why is acetylcholine used instead of a hormone at neuromuscular junctions?
- Widespread effect
- Longer duration
- Slower diffusion
- Faster response
-
What happens to muscle fibres if calcium ion release is blocked?
- Contraction is prevented
- Contraction speeds up
- Muscle stays contracted
- Lactic acid accumulates
-
Which structural feature is present in cardiac muscle but absent in skeletal muscle?
- Intercalated discs
- Sarcomeres
- Striations
- Myofibrils
-
Which step in the cross-bridge cycle directly requires ATP hydrolysis?
- Exposing binding sites
- Binding calcium ions
- Detaching myosin heads
- Releasing troponin
-
Compared to hormonal control, how is nervous control described?
- Slower and widespread
- Faster and widespread
- Faster and localised
- Slower and localised
-
What is the role of cyclic AMP in adrenaline cell signalling?
- Second messenger
- Hydrolytic enzyme
- First messenger
- Membrane receptor
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