Adrenaline and noradrenaline are hormones that can act as

Options

A. Energy producing agents
B. Neurotransmitter
C. Energy yielding agents
D. Biocatayst

Answer

To solve the question regarding the functions of adrenaline and noradrenaline, we can follow these steps:

### Step 1: Understand the hormones
Adrenaline (also known as epinephrine) and noradrenaline (also known as norepinephrine) are hormones produced by the adrenal glands. They are part of the body's response to stress and are involved in the 'fight or flight' response.

### Step 2: Identify their roles
Both adrenaline and noradrenaline play critical roles in the body. They are involved in increasing heart rate, blood pressure, and energy availability during stressful situations.

### Step 3: Determine their classification
Adrenaline and noradrenaline are not only hormones but also function as neurotransmitters. Neurotransmitters are chemicals that transmit signals across a synapse from one neuron to another.

### Step 4: Analyze the options
1. **Energy producing agents** - This is not accurate as they do not directly produce energy.
2. **Neurotransmitter** - This is correct since they transmit nerve impulses.
3. **Energy yielding agents** - This is misleading as they do not yield energy directly.
4. **Bio catalyst** - This is incorrect as they do not act as catalysts in biochemical reactions.

### Conclusion
Based on the analysis, the correct answer is that adrenaline and noradrenaline act as **neurotransmitters**.

### Final Answer
Adrenaline and noradrenaline are hormones that can act as **neurotransmitters**.

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