Answer:
The five parts of reflex arc are sense organs (receptor) followed by sensory neuron, then the inter neuron, motor neuron and lastly by the muscles/body organs.
Explanation:
The five parts of reflex arc are -
a) The first part is the receptor which comprises of sense organ whose function is to sense the impulse and pass the perceived information to the sensory neuron.
b) The sensory neuron then carry the information from sense organs to the central nervous system (CNS) for processing.
c) The inter neurons carry the information from CNS to the motor neuron
d) After receiving processed information/ action potential from inter neuron it is sent to the other parts of the body and away from the CNS
.
e) Lastly, the muscles/body organs which receive information from the motor neuron, enact as directed by the CNS as a response to the impulse received.
A basic tenet of modern biology, first stated by Matthias Schleiden and Theodor Schwann in 1838–39, that cells<span> are the basic units of structure and function in living organisms. ... A </span>theory<span> of heredity must be reconciled with the </span>cell theory<span>.</span>
Answer:
D. Each receptor triggers one particular type of cell behavior, for example, activating gene expression.
Explanation:
- Each extracellular signal molecule can induce different responses depending on the target cell.
- Lipophilic receptors diffuse or carried across the cell's plasma membrane and bind to an intracellular receptor. For example steroid hormones are transported via carrier proteins.
- Some signalling molecules only induce response from specific cells.
- A single receptor can be activated by different signal molecules.
Answer:
The answer is b. the theory must be changed or abandoned.
Explanation:
If a scientist finds a contradictory fact to an already existing theory, then after a scientific validation of the new found fact, the existing theory has to be changed or be replaced with a new one.
The rest of the answer options are silly and incorrect!
