Coordination and control – the nervous system

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Question 5
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During intense exercise, the rate of aerobic respiration in muscle cells increases, resulting in a higher concentration of carbon dioxide (CO2CO_2CO2​) in the blood and a consequent decrease in blood pH. Homeostatic mechanisms are initiated to increase heart rate and accelerate the removal of carbon dioxide.

Nervous regulation of heart rate

Using the diagram, which row in the table correctly identifies:

  1. The type of receptor represented by Receptors B that detects this change,
  2. The specific functional centre of Brain Region A (the medulla oblongata) that coordinates the response,
  3. The type of autonomic nerve represented by Nerve Pathway C when active to increase heart rate, and
  4. The neurotransmitter released by Nerve Pathway C at the sinoatrial node (SAN)?
Receptors BCentre in Region ANerve Pathway CNeurotransmitterChemoreceptorsCardioacceleratorySympatheticNoradrenaline \begin{array}{c|c|c|c} \text{Receptors B} & \text{Centre in Region A} & \text{Nerve Pathway C} & \text{Neurotransmitter} \\ \hline \text{Chemoreceptors} & \text{Cardioacceleratory} & \text{Sympathetic} & \text{Noradrenaline} \end{array} Receptors BChemoreceptors​Centre in Region ACardioacceleratory​Nerve Pathway CSympathetic​NeurotransmitterNoradrenaline​​
Receptors BCentre in Region ANerve Pathway CNeurotransmitterBaroreceptorsCardioacceleratorySympatheticNoradrenaline \begin{array}{c|c|c|c} \text{Receptors B} & \text{Centre in Region A} & \text{Nerve Pathway C} & \text{Neurotransmitter} \\ \hline \text{Baroreceptors} & \text{Cardioacceleratory} & \text{Sympathetic} & \text{Noradrenaline} \end{array} Receptors BBaroreceptors​Centre in Region ACardioacceleratory​Nerve Pathway CSympathetic​NeurotransmitterNoradrenaline​​
Receptors BCentre in Region ANerve Pathway CNeurotransmitterChemoreceptorsCardioinhibitoryParasympatheticAcetylcholine \begin{array}{c|c|c|c} \text{Receptors B} & \text{Centre in Region A} & \text{Nerve Pathway C} & \text{Neurotransmitter} \\ \hline \text{Chemoreceptors} & \text{Cardioinhibitory} & \text{Parasympathetic} & \text{Acetylcholine} \end{array} Receptors BChemoreceptors​Centre in Region ACardioinhibitory​Nerve Pathway CParasympathetic​NeurotransmitterAcetylcholine​​
Receptors BCentre in Region ANerve Pathway CNeurotransmitterBaroreceptorsCardioinhibitoryParasympatheticAcetylcholine \begin{array}{c|c|c|c} \text{Receptors B} & \text{Centre in Region A} & \text{Nerve Pathway C} & \text{Neurotransmitter} \\ \hline \text{Baroreceptors} & \text{Cardioinhibitory} & \text{Parasympathetic} & \text{Acetylcholine} \end{array} Receptors BBaroreceptors​Centre in Region ACardioinhibitory​Nerve Pathway CParasympathetic​NeurotransmitterAcetylcholine​​

Coordination and control – the nervous system Questions

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