d. receptor, sensory neuron, interneuron, motor neuron, effector
Explanation:
Receptor is the first component of the reflex arc with the function to receive signal (it detects the change in environment, external or internal).
Sensory neuron is responsible for the transport of signal from the receptor to the interneuron which is then connected with the motor neuron.Motor neuron further sends the signal to the effector which produces the response (e.g. muscle contraction).
I believe the correct answer among the choices listed above is option B. A gland secretes enzymes through a duct onto the surface of a body part is a salivary gland. It is under the classification of exocrine glands. Hope this answers the question.
Innate immunity is also referred to as inherited or natural immunity. It is the type of immunity that one is born with. It is passed on from mother to offspring. This form of immunity is non-specific as it offers protection from many types of antigens.
