Explanation

• A synapse is the junction where a neuron communicates with another neuron or another cell, such as a muscle or gland cell.
• At a chemical synapse, the neuron releases chemical messengers called neurotransmitters to transmit signals across the synaptic cleft.
• Synapses help control important functions such as movement, learning, memory, and reflex actions.

Last verified on 28-10-2026

Explanation

• The peripheral nervous system (PNS) includes 12 pairs of cranial nerves that originate from the brain.
• These nerves primarily control functions of the head, neck, and some internal organs like the heart and lungs.

Last verified on 28-10-2026

Explanation

Explanation

• Observation is the first step in the scientific method, which is used to solve biological problems.
• Scientists make observations about the natural world, notice patterns or phenomena, and ask questions about what they have observed.

The correct order of the scientific method is:

• Observation
• Question
• Hypothesis
• Prediction
• Experimentation
• Data analysis
• Conclusion

Last verified on 28-10-2026

Explanation

• Epimysium is the connective tissue membrane that surrounds the entire skeletal muscle.
• Perimysium surrounds a bundle of muscle fibres called a fascicle.
• Endomysium surrounds each individual muscle fibre.
• These three connective tissue layers support muscle structure.
• It help transmit the force generated during muscle contraction.

Last verified on 28-10-2026